diff --git a/docs/api-reference.md b/docs/api-reference.md
index 97bf879a..8f43b8c5 100644
--- a/docs/api-reference.md
+++ b/docs/api-reference.md
@@ -448,7 +448,7 @@ solely by the separate external-pad policy, not by these two settings.
 
   The answers of a public share (`/api/v1/public/...`) carry the codes that can come up there - `waiting_binding` and `pad_too_large` - but not `missing_binding` or `missing_frontmatter`: what a client does on those needs a signed-in user. Their messages are translated, one sentence for each kind of trouble.
 
-  A response without a `code` may still be machine-readable through its HTTP status and other documented fields — a locked `.pad` answers `503` with `retryable: true`, signed in and public alike, for instance, and so does a request this instance's Etherpad could not be reached for. Every `503` of this app carries `retryable: true`, and it never answers `502` or `504`: the clients take any of the three without it for a proxy's or a maintenance page's. A file's row that another request made first (`BindingNotCreatedException`, two initialisations at once, say) answers `400` with `retryable: true` too: the next open finds that request's pad. The create endpoints answer it with their own sentence and neither field. One Etherpad answered and refused answers `400` without it: trying again gives the same answer. What is never a stable identifier is the `message` text.
+  A response without a `code` may still be machine-readable through its HTTP status and other documented fields — a locked `.pad` answers `503` with `retryable: true`, signed in and public alike, for instance, and so does a request this instance's Etherpad could not be reached for. Every error this app answers is JSON, it never answers `502` or `504`, and every `503` of its own carries `retryable: true`; what the clients make of a 5xx that is none of these is in `docs/architecture.md` ("Errors of the API"). A file's row that another request made first (`BindingNotCreatedException`, two initialisations at once, say) answers `400` with `retryable: true` too: the next open finds that request's pad. The create endpoints answer it with their own sentence and neither field. One Etherpad answered and refused answers `400` without it: trying again gives the same answer. What is never a stable identifier is the `message` text.
 
 ## Cookie Behavior (Protected Pads)
 
@@ -490,8 +490,9 @@ solely by the separate external-pad policy, not by these two settings.
     - `epnc:host-sync-now`
 - `src/embed-create-main.js`
   - powers the minimal `/embed/create-by-parent/{parentFolderId}` page.
-  - uses same-origin `POST /api/v1/pads/create-by-parent`.
+  - uses same-origin `POST /api/v1/pads/create-by-parent`, without a time limit, as it writes.
   - redirects to returned `embed_url` after successful pad creation.
+  - tells the host `epnc:create-succeeded` or `epnc:create-failed`; after `reason: 'network'` the outcome is not known (`docs/architecture.md`, the create flow).
 
 ## URL Control in Files App
 
diff --git a/docs/architecture.md b/docs/architecture.md
index b730965a..7f009b5d 100644
--- a/docs/architecture.md
+++ b/docs/architecture.md
@@ -169,7 +169,14 @@ Primary flow (minimal blank create launcher page):
 5. `PadCreateController::createByParent` performs server-side validation of `name`, `accessMode`, and the writable target folder before creating the `.pad` file and binding.
 6. Before redirecting, `src/embed-create-main.js` posts the host page one of two structured events so the surrounding UI can react without scraping the iframe DOM:
    - `epnc:create-succeeded` — payload `{embed_url, file_id, pad_id, access_mode}`. Fires once on the success path, immediately before the iframe self-redirects to the embed-open URL.
-   - `epnc:create-failed` — payload `{reason, status, message}`. Fires on any error. `reason` is one of `'invalid'` (client-side validation), `'conflict'` (HTTP 409 — e.g. duplicate filename), `'server'` (any other 4xx/5xx), or `'network'` (fetch itself failed).
+   - `epnc:create-failed` — payload `{reason, status, message, code, retryable}`. Fires on any error. `reason` is one of:
+     - `'invalid'`: client-side validation failed; nothing was sent.
+     - `'conflict'`: a `409`, a name taken or a file that changed while its pad was set up; `code` tells them apart.
+     - `'server'`: refused with any other 4xx, by this app or by a proxy before it, so nothing was created; or failed by this app with a 5xx of its own, which it rolls back as far as it can; or answered in a way the page cannot use.
+     - `'network'`: no answer from this app (see "Errors of the API"), so the pad may have been created anyway. `status` carries what came, if anything, and the message says to look in the folder before trying again.
+
+     `code` and `retryable` are the server's (`docs/api-reference.md`), `null` and `false` without them: `retryable` says the same create may work later, a locked folder say.
+   The create has no client-side time limit, as it writes: a slow create is not a failed one, and the page reports nothing until the server or a proxy answers. A host that stops waiting on its own must assume the pad may still be created.
    The inline error rendering inside the iframe is unchanged — `postMessage` is purely additive for hosts that want to act on the outcome. Target-origin is `*` because the page doesn't know the host's origin up-front; the `frame-ancestors` allowlist already constrains who can be the parent.
 7. On success the launcher redirects itself to the returned `embed_url`, after which the normal embed-open flow takes over.
 
@@ -305,7 +312,7 @@ Primary flow (native viewer):
 
 - `PadControllerErrorMapper` (signed in) and `PublicViewerControllerErrorMapper` (public shares) answer an error with a translated sentence of their own; `code` and `retryable` come from `ApiErrorCode`, and `docs/api-reference.md` lists the codes. An exception's message is for the log; only a refusal translated where it is thrown, and the reason a pad on another server cannot be linked or read, reach the reader as they are.
 - The viewer and the embed page offer "Try again" where the same open may work later (`isRetryableOpenError()` in `src/lib/pad-open-flow.js`); the button runs the whole open again. That is every answer with `retryable` (`docs/api-reference.md` lists the cases); `pad_file_changed`, which an open meets only while initialising the file, after the server undid its part; and any step of the open that got no answer, the initialise too. The second try opens first and finds a pad the first try set up, and one still being set up is safe to meet: the server compares the file before it writes, a file has one binding row, and a pad that lost either race is rolled back.
-- `fetchJsonWithTimeout()` marks a request that got no answer from this app as `unanswered`: its own timeout, a failed network, also while the body streams in, and a `502`, `503` or `504` without `retryable`, since this app never answers 502 or 504 and every 503 of its own carries it; a proxy or Nextcloud in maintenance answers in its place. It says only that, since whether another try is safe depends on the request. A recovery that got no answer is not offered again: the clients open the file instead, which shows the pad if it went through and the recovery card if not. Both clients say "no answer" in a translated sentence of their own rather than the browser's English.
+- `fetchJsonWithTimeout()` marks a request that got no answer from this app as `unanswered`: its own timeout, a failed network, also while the body streams in (the status, if one came, goes along), and a 5xx that cannot be this app's answer by what `docs/api-reference.md` says of its errors: one whose body is not JSON, or a 502, 503 or 504 without `retryable`. A proxy, Nextcloud in maintenance or PHP dying midway sent it. It says only that, since whether another try is safe depends on the request. A recovery that got no answer is not offered again: the clients open the file instead, which shows the pad if it went through and the recovery card if not. Both clients say "no answer" in a translated sentence of their own rather than the browser's English.
 - After a click whose button goes away or is disabled with the focus on it, a second try or a recovery, the viewer and the embed page hand the focus to the card's first action, or to its message (`src/lib/hand-focus.js`). Not on the first load. The embed page does it without scrolling, since it sits in another page. The message of each error card is `role="alert"`, so an error is read out when it appears, the first one too.
 - This instance's Etherpad not reachable answers `503` with `retryable`; a refusal from it (`EtherpadRefusedException`: a pad or group it does not have, a key it does not take) `400`. A pad on another server (`ExternalPadException`) is neither. Which is which the exceptions say (`EtherpadClientException::isEtherpadUnreachable()`); the answer and the log both go by it.
 - Each error answered is logged once, by `ApiErrorLog`; the services under the mappers leave it to it, save the few lines that explain a refusal nothing else would (a name another create has locked, a file a create will not write over, a refused legacy migration):
diff --git a/js/etherpad_nextcloud-embed-create-main.mjs b/js/etherpad_nextcloud-embed-create-main.mjs
index 8530a0f8..6d270e8b 100644
--- a/js/etherpad_nextcloud-embed-create-main.mjs
+++ b/js/etherpad_nextcloud-embed-create-main.mjs
@@ -1,2 +1,2 @@
-import{i as U,f as A,o as P,D as R}from"./fetch-helpers-Dqr3YYFE.chunk.mjs";(function(){const r=document.getElementById("etherpad-nextcloud-embed-create");if(!(r instanceof HTMLElement))return;const d=Number(r.getAttribute("data-parent-folder-id")||""),c=String(r.getAttribute("data-create-by-parent-url")||"").trim(),b=String(r.getAttribute("data-request-token")||"").trim(),w=String(r.getAttribute("data-l10n-missing-name")||"Pad name is required."),h=String(r.getAttribute("data-l10n-invalid-access-mode")||"Invalid access mode."),y=String(r.getAttribute("data-l10n-incomplete-config")||"Embed configuration is incomplete."),l=r.querySelector("[data-epnc-embed-create-loading]"),m=r.querySelector("[data-epnc-embed-create-error]"),u=r.querySelector("[data-epnc-embed-create-error-message]"),g=()=>P(b),f=(e,n)=>{if(window.parent!==window)try{window.parent.postMessage(Object.assign({type:e},n||{}),"*")}catch{}},S=e=>{l instanceof HTMLElement&&(l.hidden=!0),u instanceof HTMLElement&&(u.textContent=String(e||"Unknown error.")),m instanceof HTMLElement&&(m.hidden=!1)},a=(e,n,o)=>{const t=String(n||"Unknown error.");S(t),f("epnc:create-failed",{reason:e,status:typeof o=="number"?o:null,message:t})},_=()=>{const e=new URL(window.location.href).searchParams;return{name:String(e.get("name")||"").trim(),accessMode:String(e.get("accessMode")||R).trim()}},v=e=>{const n=new URL(String(e||"").trim(),window.location.origin);if(n.origin!==window.location.origin)throw new Error("Invalid embed URL origin.");return n.pathname+n.search+n.hash},L=e=>e===409?"conflict":"server";(async()=>{if(!Number.isFinite(d)||d<=0||c===""){a("invalid",y);return}if(g()===""){a("invalid","CSRF request token is missing.");return}const{name:e,accessMode:n}=_();if(e===""){a("invalid",w);return}if(!U(n)){a("invalid",h);return}const o=new URLSearchParams;o.set("parentFolderId",String(d)),o.set("name",e),o.set("accessMode",n);let t;try{t=await A(c,{method:"POST",headers:{"Content-Type":"application/x-www-form-urlencoded;charset=UTF-8",requesttoken:g()},body:o.toString()})}catch(i){const s=i&&typeof i.status=="number"?i.status:null,E=i instanceof Error?i.message:"Pad creation failed.",M=s===null?"network":L(s);a(M,E,s);return}if(!t||typeof t.embed_url!="string"||t.embed_url.trim()===""){a("server","Pad creation API did not return a valid embed URL.");return}let p;try{p=v(t.embed_url)}catch(i){const s=i instanceof Error?i.message:"Invalid embed URL.";a("server",s);return}f("epnc:create-succeeded",{embed_url:t.embed_url,file_id:typeof t.file_id=="number"?t.file_id:null,pad_id:typeof t.pad_id=="string"?t.pad_id:"",access_mode:typeof t.access_mode=="string"?t.access_mode:""}),window.location.replace(p)})()})();
+import{i as U,f as k,a as T,o as q,D as P}from"./fetch-helpers-BUxbvlK6.chunk.mjs";(function(){const n=document.getElementById("etherpad-nextcloud-embed-create");if(!(n instanceof HTMLElement))return;const c=Number(n.getAttribute("data-parent-folder-id")||""),l=String(n.getAttribute("data-create-by-parent-url")||"").trim(),h=String(n.getAttribute("data-request-token")||"").trim(),S=String(n.getAttribute("data-l10n-missing-name")||"Pad name is required."),_=String(n.getAttribute("data-l10n-invalid-access-mode")||"Invalid access mode."),v=String(n.getAttribute("data-l10n-incomplete-config")||"Embed configuration is incomplete."),M=String(n.getAttribute("data-l10n-unanswered")||"Nextcloud did not answer. The pad may have been created anyway; look in the folder before you try again."),u=String(n.getAttribute("data-l10n-failed")||"Pad creation failed."),m=n.querySelector("[data-epnc-embed-create-loading]"),g=n.querySelector("[data-epnc-embed-create-error]"),f=n.querySelector("[data-epnc-embed-create-error-message]"),b=()=>q(h),p=(t,a)=>{if(window.parent!==window)try{window.parent.postMessage(Object.assign({type:t},a||{}),"*")}catch{}},L=t=>{m instanceof HTMLElement&&(m.hidden=!0),f instanceof HTMLElement&&(f.textContent=String(t||"Unknown error.")),g instanceof HTMLElement&&(g.hidden=!1)},o=(t,a,d,e=null)=>{const s=String(a||"Unknown error.");L(s),p("epnc:create-failed",{reason:t,status:typeof d=="number"?d:null,message:s,code:e&&typeof e.code=="string"?e.code:null,retryable:!!e&&e.retryable===!0})},A=()=>{const t=new URL(window.location.href).searchParams;return{name:String(t.get("name")||"").trim(),accessMode:String(t.get("accessMode")||P).trim()}},E=t=>{const a=new URL(String(t||"").trim(),window.location.origin);if(a.origin!==window.location.origin)throw new Error("Invalid embed URL origin.");return a.pathname+a.search+a.hash};(async()=>{if(!Number.isFinite(c)||c<=0||l===""){o("invalid",v);return}if(b()===""){o("invalid","CSRF request token is missing.");return}const{name:t,accessMode:a}=A();if(t===""){o("invalid",S);return}if(!U(a)){o("invalid",_);return}const d=new URLSearchParams;d.set("parentFolderId",String(c)),d.set("name",t),d.set("accessMode",a);let e;try{e=await k(l,{method:"POST",headers:{"Content-Type":"application/x-www-form-urlencoded;charset=UTF-8",requesttoken:b()},body:d.toString()},{timeoutMs:null,fallbackMessage:u})}catch(r){const i=r&&typeof r.status=="number"?r.status:null,w=T(r),y=!w&&r instanceof Error&&r.message?r.message:u;if(i!==null&&i>=400&&i<500){o(i===409?"conflict":"server",y,i,r);return}if(i===null||w){o("network",M,i);return}o("server",y,i,r);return}if(!e||typeof e.embed_url!="string"||e.embed_url.trim()===""){o("server","Pad creation API did not return a valid embed URL.");return}let s;try{s=E(e.embed_url)}catch(r){const i=r instanceof Error?r.message:"Invalid embed URL.";o("server",i);return}p("epnc:create-succeeded",{embed_url:e.embed_url,file_id:typeof e.file_id=="number"?e.file_id:null,pad_id:typeof e.pad_id=="string"?e.pad_id:"",access_mode:typeof e.access_mode=="string"?e.access_mode:""}),window.location.replace(s)})()})();
 //# sourceMappingURL=etherpad_nextcloud-embed-create-main.mjs.map
diff --git a/js/etherpad_nextcloud-embed-create-main.mjs.map b/js/etherpad_nextcloud-embed-create-main.mjs.map
index 5b8deafd..1b792f4d 100644
--- a/js/etherpad_nextcloud-embed-create-main.mjs.map
+++ b/js/etherpad_nextcloud-embed-create-main.mjs.map
@@ -1 +1 @@
-{"version":3,"file":"etherpad_nextcloud-embed-create-main.mjs","sources":["../src/embed-create-main.js"],"sourcesContent":["/**\n * SPDX-License-Identifier: AGPL-3.0-or-later\n * Copyright (c) 2026 Jacob Bühler\n */\nimport { DEFAULT_PAD_ACCESS_MODE, isPadAccessMode } from './lib/constants.js'\nimport { ocRequestToken } from './lib/oc-compat.js'\nimport { fetchJsonWithTimeout as fetchJson } from './lib/fetch-helpers.js'\n\n(function () {\n\tconst root = document.getElementById('etherpad-nextcloud-embed-create')\n\tif (!(root instanceof HTMLElement)) {\n\t\treturn\n\t}\n\n\tconst parentFolderId = Number(root.getAttribute('data-parent-folder-id') || '')\n\tconst createByParentUrl = String(root.getAttribute('data-create-by-parent-url') || '').trim()\n\tconst templateRequestToken = String(root.getAttribute('data-request-token') || '').trim()\n\tconst missingNameMessage = String(root.getAttribute('data-l10n-missing-name') || 'Pad name is required.')\n\tconst invalidAccessModeMessage = String(root.getAttribute('data-l10n-invalid-access-mode') || 'Invalid access mode.')\n\tconst incompleteConfigMessage = String(root.getAttribute('data-l10n-incomplete-config') || 'Embed configuration is incomplete.')\n\tconst loadingNode = root.querySelector('[data-epnc-embed-create-loading]')\n\tconst errorNode = root.querySelector('[data-epnc-embed-create-error]')\n\tconst errorMessageNode = root.querySelector('[data-epnc-embed-create-error-message]')\n\n\tconst requestToken = () => ocRequestToken(templateRequestToken)\n\n\t/**\n\t * Post an `epnc:*` event to the host page that's embedding this iframe.\n\t *\n\t * Target-origin is `*` rather than a specific origin because the create\n\t * page doesn't know the host's origin up-front (the host hasn't talked to\n\t * us yet). The actual access control happens at iframe-load time via the\n\t * route's CSP `frame-ancestors` header, which only lists the admin-\n\t * configured `trusted_embed_origins`. Anyone receiving these messages is\n\t * by construction already in that allowlist.\n\t *\n\t * No-ops if we're not actually embedded (window.parent === window).\n\t */\n\tconst postHostMessage = (type, payload) => {\n\t\tif (window.parent === window) {\n\t\t\treturn\n\t\t}\n\t\ttry {\n\t\t\twindow.parent.postMessage(Object.assign({ type }, payload || {}), '*')\n\t\t} catch (e) {\n\t\t\t// Posting can throw on certain cross-origin / cross-process boundaries;\n\t\t\t// inline error rendering is the user-visible fallback, so the message\n\t\t\t// is purely advisory for the host.\n\t\t}\n\t}\n\n\tconst showError = (message) => {\n\t\tif (loadingNode instanceof HTMLElement) {\n\t\t\tloadingNode.hidden = true\n\t\t}\n\t\tif (errorMessageNode instanceof HTMLElement) {\n\t\t\terrorMessageNode.textContent = String(message || 'Unknown error.')\n\t\t}\n\t\tif (errorNode instanceof HTMLElement) {\n\t\t\terrorNode.hidden = false\n\t\t}\n\t}\n\n\t/**\n\t * Emit a structured `epnc:create-failed` event AND render the inline error.\n\t * The message is normalised once so the host's payload and the user-facing\n\t * inline message never drift (an empty/undefined `message` would otherwise\n\t * land in the iframe as \"Unknown error.\" but in the postMessage payload as\n\t * the empty string).\n\t *\n\t * `reason` is a coarse bucket so hosts can branch without parsing the\n\t * HTTP status:\n\t *   - 'invalid' — client-side validation failed (missing name, etc.)\n\t *   - 'conflict' — backend returned 409 (e.g. duplicate filename)\n\t *   - 'server'  — any other 4xx / 5xx\n\t *   - 'network' — fetch itself failed (offline, CORS, timeout)\n\t */\n\tconst failCreate = (reason, message, status) => {\n\t\tconst normalizedMessage = String(message || 'Unknown error.')\n\t\tshowError(normalizedMessage)\n\t\tpostHostMessage('epnc:create-failed', {\n\t\t\treason,\n\t\t\tstatus: typeof status === 'number' ? status : null,\n\t\t\tmessage: normalizedMessage,\n\t\t})\n\t}\n\n\tconst readLauncherParams = () => {\n\t\tconst params = new URL(window.location.href).searchParams\n\t\treturn {\n\t\t\tname: String(params.get('name') || '').trim(),\n\t\t\taccessMode: String(params.get('accessMode') || DEFAULT_PAD_ACCESS_MODE).trim(),\n\t\t}\n\t}\n\n\tconst normalizeEmbedRedirectUrl = (value) => {\n\t\tconst url = new URL(String(value || '').trim(), window.location.origin)\n\t\tif (url.origin !== window.location.origin) {\n\t\t\tthrow new Error('Invalid embed URL origin.')\n\t\t}\n\t\treturn url.pathname + url.search + url.hash\n\t}\n\n\tconst classifyHttpStatus = (status) => {\n\t\tif (status === 409) {\n\t\t\treturn 'conflict'\n\t\t}\n\t\treturn 'server'\n\t}\n\n\tconst run = async () => {\n\t\tif (!Number.isFinite(parentFolderId) || parentFolderId <= 0 || createByParentUrl === '') {\n\t\t\tfailCreate('invalid', incompleteConfigMessage)\n\t\t\treturn\n\t\t}\n\t\tif (requestToken() === '') {\n\t\t\tfailCreate('invalid', 'CSRF request token is missing.')\n\t\t\treturn\n\t\t}\n\n\t\tconst { name, accessMode } = readLauncherParams()\n\t\tif (name === '') {\n\t\t\tfailCreate('invalid', missingNameMessage)\n\t\t\treturn\n\t\t}\n\t\tif (!isPadAccessMode(accessMode)) {\n\t\t\tfailCreate('invalid', invalidAccessModeMessage)\n\t\t\treturn\n\t\t}\n\n\t\tconst body = new URLSearchParams()\n\t\tbody.set('parentFolderId', String(parentFolderId))\n\t\tbody.set('name', name)\n\t\tbody.set('accessMode', accessMode)\n\n\t\t// Step 1: server-side create. Failures here are either network\n\t\t// (fetch threw — no HTTP status reached us) or server (we got a\n\t\t// status code back, including the 409 on duplicate filename).\n\t\tlet data\n\t\ttry {\n\t\t\tdata = await fetchJson(createByParentUrl, {\n\t\t\t\tmethod: 'POST',\n\t\t\t\theaders: {\n\t\t\t\t\t'Content-Type': 'application/x-www-form-urlencoded;charset=UTF-8',\n\t\t\t\t\trequesttoken: requestToken(),\n\t\t\t\t},\n\t\t\t\tbody: body.toString(),\n\t\t\t})\n\t\t} catch (error) {\n\t\t\tconst status = (error && typeof error.status === 'number') ? error.status : null\n\t\t\tconst message = error instanceof Error ? error.message : 'Pad creation failed.'\n\t\t\tconst reason = status === null ? 'network' : classifyHttpStatus(status)\n\t\t\tfailCreate(reason, message, status)\n\t\t\treturn\n\t\t}\n\n\t\t// Step 2: validate the server's response shape *and* the redirect\n\t\t// target before emitting success. A malformed or cross-origin\n\t\t// embed_url is a server-side bug, not a network failure — and we\n\t\t// must not announce success only to then announce failure to the\n\t\t// same host listener, which would leave them with contradictory\n\t\t// signals.\n\t\tif (!data || typeof data.embed_url !== 'string' || data.embed_url.trim() === '') {\n\t\t\tfailCreate('server', 'Pad creation API did not return a valid embed URL.')\n\t\t\treturn\n\t\t}\n\t\tlet redirectTarget\n\t\ttry {\n\t\t\tredirectTarget = normalizeEmbedRedirectUrl(data.embed_url)\n\t\t} catch (error) {\n\t\t\tconst message = error instanceof Error ? error.message : 'Invalid embed URL.'\n\t\t\tfailCreate('server', message)\n\t\t\treturn\n\t\t}\n\n\t\t// Step 3: announce success once everything is definitively OK, then\n\t\t// navigate. 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+{"version":3,"file":"etherpad_nextcloud-embed-create-main.mjs","sources":["../src/embed-create-main.js"],"sourcesContent":["/**\n * SPDX-License-Identifier: AGPL-3.0-or-later\n * Copyright (c) 2026 Jacob Bühler\n */\nimport { DEFAULT_PAD_ACCESS_MODE, isPadAccessMode } from './lib/constants.js'\nimport { ocRequestToken } from './lib/oc-compat.js'\nimport { fetchJsonWithTimeout as fetchJson, isUnanswered } from './lib/fetch-helpers.js'\n\n(function () {\n\tconst root = document.getElementById('etherpad-nextcloud-embed-create')\n\tif (!(root instanceof HTMLElement)) {\n\t\treturn\n\t}\n\n\tconst parentFolderId = Number(root.getAttribute('data-parent-folder-id') || '')\n\tconst createByParentUrl = String(root.getAttribute('data-create-by-parent-url') || '').trim()\n\tconst templateRequestToken = String(root.getAttribute('data-request-token') || '').trim()\n\tconst missingNameMessage = String(root.getAttribute('data-l10n-missing-name') || 'Pad name is required.')\n\tconst invalidAccessModeMessage = String(root.getAttribute('data-l10n-invalid-access-mode') || 'Invalid access mode.')\n\tconst incompleteConfigMessage = String(root.getAttribute('data-l10n-incomplete-config') || 'Embed configuration is incomplete.')\n\tconst unansweredMessage = String(root.getAttribute('data-l10n-unanswered') || 'Nextcloud did not answer. The pad may have been created anyway; look in the folder before you try again.')\n\tconst failedMessage = String(root.getAttribute('data-l10n-failed') || 'Pad creation failed.')\n\tconst loadingNode = root.querySelector('[data-epnc-embed-create-loading]')\n\tconst errorNode = root.querySelector('[data-epnc-embed-create-error]')\n\tconst errorMessageNode = root.querySelector('[data-epnc-embed-create-error-message]')\n\n\tconst requestToken = () => ocRequestToken(templateRequestToken)\n\n\t/**\n\t * Post an `epnc:*` event to the host page that's embedding this iframe.\n\t *\n\t * Target-origin is `*` rather than a specific origin because the create\n\t * page doesn't know the host's origin up-front (the host hasn't talked to\n\t * us yet). The actual access control happens at iframe-load time via the\n\t * route's CSP `frame-ancestors` header, which only lists the admin-\n\t * configured `trusted_embed_origins`. Anyone receiving these messages is\n\t * by construction already in that allowlist.\n\t *\n\t * No-ops if we're not actually embedded (window.parent === window).\n\t */\n\tconst postHostMessage = (type, payload) => {\n\t\tif (window.parent === window) {\n\t\t\treturn\n\t\t}\n\t\ttry {\n\t\t\twindow.parent.postMessage(Object.assign({ type }, payload || {}), '*')\n\t\t} catch (e) {\n\t\t\t// Posting can throw on certain cross-origin / cross-process boundaries;\n\t\t\t// inline error rendering is the user-visible fallback, so the message\n\t\t\t// is purely advisory for the host.\n\t\t}\n\t}\n\n\tconst showError = (message) => {\n\t\tif (loadingNode instanceof HTMLElement) {\n\t\t\tloadingNode.hidden = true\n\t\t}\n\t\tif (errorMessageNode instanceof HTMLElement) {\n\t\t\terrorMessageNode.textContent = String(message || 'Unknown error.')\n\t\t}\n\t\tif (errorNode instanceof HTMLElement) {\n\t\t\terrorNode.hidden = false\n\t\t}\n\t}\n\n\t/**\n\t * Emit a structured `epnc:create-failed` event AND render the inline error.\n\t * The message is normalised once so the host's payload and the user-facing\n\t * inline message never drift (an empty/undefined `message` would otherwise\n\t * land in the iframe as \"Unknown error.\" but in the postMessage payload as\n\t * the empty string).\n\t *\n\t * The host contract is in docs/architecture.md (the create flow);\n\t * `reason` in short:\n\t *   - 'invalid' — client-side validation failed\n\t *   - 'conflict' — a 409\n\t *   - 'server' — refused with another 4xx, or this app's own 5xx\n\t *   - 'network' — no answer from this app; the pad may exist\n\t * `code` and `retryable` are the server's, `null` and `false` without.\n\t */\n\tconst failCreate = (reason, message, status, answer = null) => {\n\t\tconst normalizedMessage = String(message || 'Unknown error.')\n\t\tshowError(normalizedMessage)\n\t\tpostHostMessage('epnc:create-failed', {\n\t\t\treason,\n\t\t\tstatus: typeof status === 'number' ? status : null,\n\t\t\tmessage: normalizedMessage,\n\t\t\tcode: answer && typeof answer.code === 'string' ? answer.code : null,\n\t\t\tretryable: Boolean(answer) && answer.retryable === true,\n\t\t})\n\t}\n\n\tconst readLauncherParams = () => {\n\t\tconst params = new URL(window.location.href).searchParams\n\t\treturn {\n\t\t\tname: String(params.get('name') || '').trim(),\n\t\t\taccessMode: String(params.get('accessMode') || DEFAULT_PAD_ACCESS_MODE).trim(),\n\t\t}\n\t}\n\n\tconst normalizeEmbedRedirectUrl = (value) => {\n\t\tconst url = new URL(String(value || '').trim(), window.location.origin)\n\t\tif (url.origin !== window.location.origin) {\n\t\t\tthrow new Error('Invalid embed URL origin.')\n\t\t}\n\t\treturn url.pathname + url.search + url.hash\n\t}\n\n\tconst run = async () => {\n\t\tif (!Number.isFinite(parentFolderId) || parentFolderId <= 0 || createByParentUrl === '') {\n\t\t\tfailCreate('invalid', incompleteConfigMessage)\n\t\t\treturn\n\t\t}\n\t\tif (requestToken() === '') {\n\t\t\tfailCreate('invalid', 'CSRF request token is missing.')\n\t\t\treturn\n\t\t}\n\n\t\tconst { name, accessMode } = readLauncherParams()\n\t\tif (name === '') {\n\t\t\tfailCreate('invalid', missingNameMessage)\n\t\t\treturn\n\t\t}\n\t\tif (!isPadAccessMode(accessMode)) {\n\t\t\tfailCreate('invalid', invalidAccessModeMessage)\n\t\t\treturn\n\t\t}\n\n\t\tconst body = new URLSearchParams()\n\t\tbody.set('parentFolderId', String(parentFolderId))\n\t\tbody.set('name', name)\n\t\tbody.set('accessMode', accessMode)\n\n\t\t// Step 1: server-side create. A write, so it has no time limit (see\n\t\t// fetchJsonWithTimeout()): cut short, it would go on creating with\n\t\t// nobody told, and a second try would meet the file it made. A slow\n\t\t// create is not a failed one.\n\t\tlet data\n\t\ttry {\n\t\t\tdata = await fetchJson(createByParentUrl, {\n\t\t\t\tmethod: 'POST',\n\t\t\t\theaders: {\n\t\t\t\t\t'Content-Type': 'application/x-www-form-urlencoded;charset=UTF-8',\n\t\t\t\t\trequesttoken: requestToken(),\n\t\t\t\t},\n\t\t\t\tbody: body.toString(),\n\t\t\t}, { timeoutMs: null, fallbackMessage: failedMessage })\n\t\t} catch (error) {\n\t\t\tconst status = (error && typeof error.status === 'number') ? error.status : null\n\t\t\tconst unanswered = isUnanswered(error)\n\t\t\tconst message = !unanswered && error instanceof Error && error.message ? error.message : failedMessage\n\t\t\t// Refused, even if the body then broke off: nothing was made.\n\t\t\tif (status !== null && status >= 400 && status < 500) {\n\t\t\t\tfailCreate(status === 409 ? 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diff --git a/js/etherpad_nextcloud-embed-main.mjs b/js/etherpad_nextcloud-embed-main.mjs
index edfd12ee..a555b97f 100644
--- a/js/etherpad_nextcloud-embed-main.mjs
+++ b/js/etherpad_nextcloud-embed-main.mjs
@@ -1,2 +1,2 @@
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o=document.createElement("span");o.className="epnc-pad-doc__toolbar-error",o.hidden=!0,n.appendChild(o);const c=document.createElement("button");if(c.type="button",c.className="button epnc-pad-doc__refresh",c.textContent=z,n.appendChild(c),String(e||"").trim()!==""){const d=document.createElement("a");d.className="button epnc-pad-doc__link",d.href=e,d.target="_blank",d.rel="noopener noreferrer",d.textContent=$,n.appendChild(d)}const i=document.createElement("div");return i.className="epnc-pad-doc__text",i.textContent=j,r.appendChild(n),r.appendChild(i),t.appendChild(r),s.appendChild(t),{body:i,refresh:c,toolbarError:o,loaded:!1}};let q=0;const k=async(e,t)=>{if(!e||!(e.body instanceof HTMLElement))return;const{body:r,refresh:n,toolbarError:o}=e;q+=1;const c=q,i=()=>c===q;e.loaded||(r.className="epnc-pad-doc__text",r.textContent=j),o instanceof HTMLElement&&(o.hidden=!0),n instanceof HTMLButtonElement&&(n.disabled=!0,n.textContent=Z);try{if(t===""){V(e,t,Y,!1);return}const d=await Ne(t);if(!i())return;if(e.loaded=!0,d.isEmpty){r.className="epnc-pad-doc__text",r.textContent=X;return}r.className="epnc-pad-doc__text epnc-pad-doc__text--html",r.innerHTML=d.html}catch(d){if(!i())return;V(e,t,C(d,w))}finally{i()&&n instanceof HTMLButtonElement&&(n.disabled=!1,n.textContent=z)}},V=(e,t,r,n=!0)=>{const{body:o,toolbarError:c}=e;if(e.loaded&&c instanceof HTMLElement){c.textContent=r||w,c.hidden=!1;return}o.className="epnc-pad-doc__text",o.textContent="";const i=document.createElement("p");i.textContent=r||w,o.appendChild(i),n&&o.appendChild(S(D,()=>{k(e,t)},"button primary"))},de=e=>{if(!(u instanceof HTMLIFrameElement)){y("Embed iframe is not available.");return}const t=()=>{u.removeEventListener("load",t),window.setTimeout(()=>{s instanceof HTMLElement&&(s.hidden=!0),u.hidden=!1},100)};u.addEventListener("load",t,{once:!0}),u.src=e},I=(e,t,r,n={})=>{!e||typeof e.postMessage!="function"||e.postMessage(Object.assign({type:r,fileId:g},n),t)},se=e=>!e||e==="null"?!1:e===window.location.origin?!0:Q.includes(e),le=()=>{A||(A=e=>{const t=String(e.origin||"");if(!se(t))return;const r=e.data,n=typeof r=="string"?r:r&&typeof r=="object"&&typeof r.type=="string"?r.type:"";if(n){if(n==="epnc:host-visible"){f.start();return}if(n==="epnc:host-hidden"){f.fireAndForget(!0,!0),f.stop();return}if(n==="epnc:host-before-close"||n==="epnc:host-sync-now"){const o=n!=="epnc:host-sync-now",c=n==="epnc:host-before-close"?"before-close":"sync-now";I(e.source,t,"epnc:sync-flush-started",{reason:c}),f.sync(!0,o).then(i=>{I(e.source,t,"epnc:sync-flush-finished",{reason:c,result:i&&typeof i=="object"?i:{}})}).catch(i=>{I(e.source,t,"epnc:sync-flush-failed",{reason:c,message:i instanceof Error?i.message:"Sync failed."})}),o&&f.stop()}}},window.addEventListener("message",A))},me=async()=>{const e=new URLSearchParams;e.set("fileId",String(g));const t=await x(U,{method:"POST",headers:{"Content-Type":"application/x-www-form-urlencoded;charset=UTF-8",requesttoken:h()},body:e.toString()});return we(t)},pe=async()=>{const e=O.replace("__FILE_ID__",encodeURIComponent(String(g))),t=await x(e,{method:"POST",headers:{requesttoken:h()}},{timeoutMs:null});t&&t.status==="migrated_from_legacy"&&console.info("Legacy Ownpad .pad migrated to managed format on first open.")},E=()=>{s instanceof HTMLElement&&(s.hidden=!0),L instanceof HTMLElement&&(L.hidden=!0),p instanceof HTMLElement&&(p.hidden=!0),u instanceof HTMLIFrameElement&&(u.hidden=!0,u.removeAttribute("src"))},ue=()=>{p instanceof HTMLElement&&(E(),p.hidden=!1,l instanceof HTMLElement&&(l.textContent=ee),b instanceof HTMLElement&&(b.textContent=""),m instanceof HTMLElement&&m.replaceChildren())},fe=(e,t)=>{if(p instanceof HTMLElement&&(E(),p.hidden=!1,l instanceof HTMLElement&&(l.textContent=t),b instanceof HTMLElement&&(b.textContent=te),m instanceof HTMLElement)){const r=document.createElement("a");r.className=v,r.href=e,r.textContent=re,m.replaceChildren(r,S(G,()=>{J()}))}},ge=e=>{p instanceof HTMLElement&&(E(),p.hidden=!1,l instanceof HTMLElement&&(l.textContent=e),b instanceof HTMLElement&&(b.textContent=ne),m instanceof HTMLElement&&m.replaceChildren(S(G,()=>{J()},v)))},W=e=>{m instanceof HTMLElement&&m.querySelectorAll("button").forEach(t=>{t.disabled=e,e?(t.dataset.originalLabel=t.dataset.originalLabel||t.textContent||"",t.textContent=ae):t.dataset.originalLabel&&(t.textContent=t.dataset.originalLabel,delete t.dataset.originalLabel)})},J=async()=>{if(P===""){y("Recovery is not available in this embed.");return}W(!0);const e=P.replace("__FILE_ID__",encodeURIComponent(String(g)));try{await x(e,{method:"POST",headers:{requesttoken:h()}},{timeoutMs:null}),T(!0)}catch(t){if(_e(t)){T(!0);return}W(!1),l instanceof HTMLElement&&(l.textContent=C(t,"Recovery failed.")),N(m,l)}},be=async()=>{if(B==="")return"";const e=B.replace("__FILE_ID__",encodeURIComponent(String(g)));try{const t=await x(e,{method:"GET"});if(t&&t.found===!0&&typeof t.embed_url=="string")return t.embed_url}catch{}return""},he=async(e,t,r)=>{const n=C(e,"Pad open failed.");ue();const o=await be();r()&&(o!==""?fe(o,n):ge(n),t&&N(m,l))};let R=0;const T=async(e=!1)=>{R+=1;const t=R,r=()=>t===R;if(ie(),!Number.isFinite(g)||g<=0||U===""||O===""){y("Embed configuration is incomplete.");return}if(h()===""){y("CSRF request token is missing.");return}try{const n=await Ce({open:me,initialize:pe,stillWanted:r});if(n===null||!r())return;const{syncUrl:o,intervalMs:c}=Se(n);f.configure({syncUrl:o,intervalMs:c}),f.installLifecycleHandlers(),le(),o!==""&&f.start();const i=Te(n),{isContentView:d,externalUrl:ye}=Me(n);if(d){const M=ce(ye);M!==null&&M.refresh.addEventListener("click",()=>{k(M,i)}),k(M,i);return}de(xe(n))}catch(n){if(!r())return;if(ve(n)){he(n,e,r);return}y(C(n,"Pad open failed."),He(n),e)}};T()})();
 //# sourceMappingURL=etherpad_nextcloud-embed-main.mjs.map
diff --git a/js/etherpad_nextcloud-embed-main.mjs.map b/js/etherpad_nextcloud-embed-main.mjs.map
index 3c14580d..3b9afae7 100644
--- a/js/etherpad_nextcloud-embed-main.mjs.map
+++ b/js/etherpad_nextcloud-embed-main.mjs.map
@@ -1 +1 @@
-{"version":3,"file":"etherpad_nextcloud-embed-main.mjs","sources":["../src/embed-main.js"],"sourcesContent":["/**\n * SPDX-License-Identifier: AGPL-3.0-or-later\n * Copyright (c) 2026 Jacob Bühler\n */\nimport { ocRequestToken } from './lib/oc-compat.js'\nimport { createPadSync } from './lib/pad-sync.js'\nimport { fetchJsonWithTimeout as fetchJson, requestErrorMessage } from './lib/fetch-helpers.js'\nimport { handFocusTo } from './lib/hand-focus.js'\nimport { loadPadContent } from './lib/pad-content.js'\nimport { assertOpenPayload, contentUrlFrom, contentViewFrom, isMissingBindingError, isRetryableOpenError, openWithFrontmatterRecovery, padUrlFrom, syncSettingsFrom } from './lib/pad-open-flow.js'\n\n(function () {\n\tconst IFRAME_REVEAL_DELAY_MS = 100\n\tconst BUTTON_CLASS = 'epnc-embed__recovery-button'\n\tconst PRIMARY_BUTTON_CLASS = BUTTON_CLASS + ' epnc-embed__recovery-button--primary'\n\n\tconst root = document.getElementById('etherpad-nextcloud-embed')\n\tif (!(root instanceof HTMLElement)) {\n\t\treturn\n\t}\n\n\tconst fileId = Number(root.getAttribute('data-file-id') || '')\n\tconst openByIdUrl = String(root.getAttribute('data-open-by-id-url') || '').trim()\n\tconst initializeByIdUrlTemplate = String(root.getAttribute('data-initialize-by-id-url-template') || '').trim()\n\tconst recoverUrlTemplate = String(root.getAttribute('data-recover-url-template') || '').trim()\n\tconst findOriginalUrlTemplate = String(root.getAttribute('data-find-original-url-template') || '').trim()\n\tconst templateRequestToken = String(root.getAttribute('data-request-token') || '').trim()\n\tconst trustedOrigins = String(root.getAttribute('data-trusted-origins') || '')\n\t\t.split(/\\s+/)\n\t\t.map((value) => value.trim())\n\t\t.filter(Boolean)\n\tconst loadingNode = root.querySelector('[data-epnc-embed-loading]')\n\tconst errorNode = root.querySelector('[data-epnc-embed-error]')\n\tconst errorMessageNode = root.querySelector('[data-epnc-embed-error-message]')\n\tconst errorActionsNode = root.querySelector('[data-epnc-embed-error-actions]')\n\tconst recoveryNode = root.querySelector('[data-epnc-embed-recovery]')\n\tconst recoveryMessageNode = root.querySelector('[data-epnc-embed-recovery-message]')\n\tconst recoveryBodyNode = root.querySelector('[data-epnc-embed-recovery-body]')\n\tconst recoveryActionsNode = root.querySelector('[data-epnc-embed-recovery-actions]')\n\tconst iframe = root.querySelector('[data-epnc-embed-iframe]')\n\tconst contentEmptyText = String(root.getAttribute('data-l10n-content-empty') || 'This pad is still empty.').trim()\n\tconst contentLoadingText = String(root.getAttribute('data-l10n-content-loading') || 'Loading pad content...').trim()\n\tconst contentErrorText = String(root.getAttribute('data-l10n-content-error') || 'Could not load the pad content.').trim()\n\tconst contentNoUrlText = String(root.getAttribute('data-l10n-content-no-url') || 'The server did not say where to load this pad from.').trim()\n\tconst contentRetryText = String(root.getAttribute('data-l10n-content-retry') || 'Try again').trim()\n\tconst contentRefreshText = String(root.getAttribute('data-l10n-content-refresh') || 'Refresh').trim()\n\tconst contentRefreshingText = String(root.getAttribute('data-l10n-content-refreshing') || 'Refreshing...').trim()\n\tconst externalLinkText = String(root.getAttribute('data-l10n-external-link') || 'Open original pad').trim()\n\tconst recoveryCheckingText = String(root.getAttribute('data-l10n-recovery-checking') || 'Checking for the original pad...').trim()\n\tconst recoveryCopyBodyText = String(root.getAttribute('data-l10n-recovery-copy-body') || '').trim()\n\tconst recoveryOrphanBodyText = String(root.getAttribute('data-l10n-recovery-orphan-body') || '').trim()\n\tconst recoveryOpenOriginalText = String(root.getAttribute('data-l10n-recovery-open-original') || 'Open the original .pad file').trim()\n\tconst recoveryCreateNewText = String(root.getAttribute('data-l10n-recovery-create-new') || 'Create new pad from this file').trim()\n\tconst recoveryCreatingText = String(root.getAttribute('data-l10n-recovery-creating') || 'Creating new pad...').trim()\n\tconst unansweredText = String(root.getAttribute('data-l10n-unanswered') || 'Nextcloud did not answer. Check your connection and try again.').trim()\n\tlet messageHandler = null\n\n\tconst requestToken = () => ocRequestToken(templateRequestToken)\n\tconst padSync = createPadSync({ requestToken })\n\n\tconst messageOf = (error, fallback) => requestErrorMessage(error, unansweredText, fallback)\n\t// The page sits in another one, which must not scroll to it.\n\tconst handFocusToCard = (actionsNode, messageNode) => handFocusTo(actionsNode, messageNode, { preventScroll: true })\n\n\t/** Every button of this page: the content's retry, the error panel's, the recovery card's. */\n\tconst buildButton = (label, onClick, className = BUTTON_CLASS) => {\n\t\tconst button = document.createElement('button')\n\t\tbutton.type = 'button'\n\t\tbutton.className = className\n\t\tbutton.textContent = label\n\t\tbutton.addEventListener('click', onClick)\n\t\treturn button\n\t}\n\n\t/**\n\t * $canRetry: the open may work later (`isRetryableOpenError`), so the\n\t * panel offers to run it again rather than a dead end. $afterClick: see\n\t * handFocusTo().\n\t */\n\tconst showError = (message, canRetry = false, afterClick = false) => {\n\t\thideAllPanels()\n\t\tif (errorMessageNode instanceof HTMLElement) {\n\t\t\terrorMessageNode.textContent = String(message || 'Unknown error.')\n\t\t}\n\t\tif (errorActionsNode instanceof HTMLElement) {\n\t\t\terrorActionsNode.replaceChildren()\n\t\t\tif (canRetry) {\n\t\t\t\terrorActionsNode.appendChild(buildButton(contentRetryText, () => { void run(true) }, PRIMARY_BUTTON_CLASS))\n\t\t\t}\n\t\t}\n\t\tif (errorNode instanceof HTMLElement) {\n\t\t\terrorNode.hidden = false\n\t\t}\n\t\tif (afterClick) {\n\t\t\thandFocusToCard(errorActionsNode, errorMessageNode)\n\t\t}\n\t}\n\n\t/** Every panel away and the loading state up: where every open starts. */\n\tconst showLoading = () => {\n\t\thideAllPanels()\n\t\tif (loadingNode instanceof HTMLElement) {\n\t\t\tloadingNode.classList.remove('epnc-embed__loading--pad-doc')\n\t\t\tloadingNode.hidden = false\n\t\t}\n\t}\n\n\t/**\n\t * The read-only surface: a small toolbar and a document area that\n\t * `loadContent` fills. Returns the parts the loader redraws, so the\n\t * frame and its button survive a refresh.\n\t */\n\tconst showPadContentView = (url) => {\n\t\tif (!(loadingNode instanceof HTMLElement)) {\n\t\t\treturn null\n\t\t}\n\t\tloadingNode.classList.add('epnc-embed__loading--pad-doc')\n\t\tloadingNode.textContent = ''\n\n\t\tconst surface = document.createElement('div')\n\t\tsurface.className = 'epnc-pad-doc'\n\n\t\tconst inner = document.createElement('div')\n\t\tinner.className = 'epnc-pad-doc__inner'\n\n\t\tconst toolbar = document.createElement('div')\n\t\ttoolbar.className = 'epnc-pad-doc__toolbar'\n\n\t\t// A failed refresh is reported here rather than in place of the pad.\n\t\tconst toolbarError = document.createElement('span')\n\t\ttoolbarError.className = 'epnc-pad-doc__toolbar-error'\n\t\ttoolbarError.hidden = true\n\t\ttoolbar.appendChild(toolbarError)\n\n\t\tconst refresh = document.createElement('button')\n\t\trefresh.type = 'button'\n\t\trefresh.className = 'button epnc-pad-doc__refresh'\n\t\trefresh.textContent = contentRefreshText\n\t\ttoolbar.appendChild(refresh)\n\n\t\t// A read-only share has nothing to link to: the pad it would point\n\t\t// at is the one being withheld.\n\t\tif (String(url || '').trim() !== '') {\n\t\t\tconst link = document.createElement('a')\n\t\t\tlink.className = 'button epnc-pad-doc__link'\n\t\t\tlink.href = url\n\t\t\tlink.target = '_blank'\n\t\t\tlink.rel = 'noopener noreferrer'\n\t\t\tlink.textContent = externalLinkText\n\t\t\ttoolbar.appendChild(link)\n\t\t}\n\n\t\tconst body = document.createElement('div')\n\t\tbody.className = 'epnc-pad-doc__text'\n\t\tbody.textContent = contentLoadingText\n\n\t\tinner.appendChild(toolbar)\n\t\tinner.appendChild(body)\n\t\tsurface.appendChild(inner)\n\t\tloadingNode.appendChild(surface)\n\n\t\t// `loaded`: \"busy\" and \"nothing yet\" are two states, and only the\n\t\t// second may blank the view.\n\t\treturn { body, refresh, toolbarError, loaded: false }\n\t}\n\n\t// So a slower earlier answer cannot land on top of a newer one.\n\tlet contentGeneration = 0\n\n\t/** Each call re-checks access on the server. */\n\tconst loadContent = async (view, contentUrl) => {\n\t\tif (!view || !(view.body instanceof HTMLElement)) {\n\t\t\treturn\n\t\t}\n\t\tconst { body, refresh, toolbarError } = view\n\t\tcontentGeneration += 1\n\t\tconst generation = contentGeneration\n\t\tconst isCurrent = () => generation === contentGeneration\n\n\t\t// Only before the first answer; after that the button carries it.\n\t\tif (!view.loaded) {\n\t\t\tbody.className = 'epnc-pad-doc__text'\n\t\t\tbody.textContent = contentLoadingText\n\t\t}\n\t\tif (toolbarError instanceof HTMLElement) {\n\t\t\ttoolbarError.hidden = true\n\t\t}\n\t\tif (refresh instanceof HTMLButtonElement) {\n\t\t\trefresh.disabled = true\n\t\t\trefresh.textContent = contentRefreshingText\n\t\t}\n\n\t\ttry {\n\t\t\tif (contentUrl === '') {\n\t\t\t\t// Retrying cannot help, so the message says what is actually\n\t\t\t\t// wrong instead of inviting another press.\n\t\t\t\trenderContentError(view, contentUrl, contentNoUrlText, false)\n\t\t\t\treturn\n\t\t\t}\n\t\t\tconst content = await loadPadContent(contentUrl)\n\t\t\tif (!isCurrent()) return\n\t\t\tview.loaded = true\n\t\t\tif (content.isEmpty) {\n\t\t\t\t// Left blank this would read as a failure nobody reported.\n\t\t\t\tbody.className = 'epnc-pad-doc__text'\n\t\t\t\tbody.textContent = contentEmptyText\n\t\t\t\treturn\n\t\t\t}\n\t\t\tbody.className = 'epnc-pad-doc__text epnc-pad-doc__text--html'\n\t\t\tbody.innerHTML = content.html\n\t\t} catch (error) {\n\t\t\tif (!isCurrent()) return\n\t\t\trenderContentError(view, contentUrl, messageOf(error, contentErrorText))\n\t\t} finally {\n\t\t\tif (isCurrent() && refresh instanceof HTMLButtonElement) {\n\t\t\t\trefresh.disabled = false\n\t\t\t\trefresh.textContent = contentRefreshText\n\t\t\t}\n\t\t}\n\t}\n\n\tconst renderContentError = (view, contentUrl, message, canRetry = true) => {\n\t\tconst { body, toolbarError } = view\n\t\t// Something is on screen: keep it, and say the attempt failed.\n\t\tif (view.loaded && toolbarError instanceof HTMLElement) {\n\t\t\ttoolbarError.textContent = message || contentErrorText\n\t\t\ttoolbarError.hidden = false\n\t\t\treturn\n\t\t}\n\t\tbody.className = 'epnc-pad-doc__text'\n\t\tbody.textContent = ''\n\n\t\tconst text = document.createElement('p')\n\t\ttext.textContent = message || contentErrorText\n\n\t\tbody.appendChild(text)\n\t\tif (canRetry) {\n\t\t\tbody.appendChild(buildButton(contentRetryText, () => { void loadContent(view, contentUrl) }, 'button primary'))\n\t\t}\n\t}\n\n\tconst showIframe = (url) => {\n\t\tif (!(iframe instanceof HTMLIFrameElement)) {\n\t\t\tshowError('Embed iframe is not available.')\n\t\t\treturn\n\t\t}\n\t\t// The loading state the open started from stays up until the pad has loaded.\n\t\tconst revealIframe = () => {\n\t\t\tiframe.removeEventListener('load', revealIframe)\n\t\t\twindow.setTimeout(() => {\n\t\t\t\tif (loadingNode instanceof HTMLElement) {\n\t\t\t\t\tloadingNode.hidden = true\n\t\t\t\t}\n\t\t\t\tiframe.hidden = false\n\t\t\t}, IFRAME_REVEAL_DELAY_MS)\n\t\t}\n\t\tiframe.addEventListener('load', revealIframe, { once: true })\n\t\tiframe.src = url\n\t}\n\n\tconst postHostMessage = (source, origin, type, payload = {}) => {\n\t\t// Replies are only sent from the already origin-validated message handler.\n\t\tif (!source || typeof source.postMessage !== 'function') {\n\t\t\treturn\n\t\t}\n\t\tsource.postMessage(Object.assign({\n\t\t\ttype,\n\t\t\tfileId,\n\t\t}, payload), origin)\n\t}\n\n\tconst isAllowedMessageOrigin = (origin) => {\n\t\tif (!origin || origin === 'null') {\n\t\t\treturn false\n\t\t}\n\t\tif (origin === window.location.origin) {\n\t\t\treturn true\n\t\t}\n\t\treturn trustedOrigins.includes(origin)\n\t}\n\n\tconst installHostMessageHandler = () => {\n\t\tif (messageHandler) {\n\t\t\treturn\n\t\t}\n\t\tmessageHandler = (event) => {\n\t\t\tconst origin = String(event.origin || '')\n\t\t\tif (!isAllowedMessageOrigin(origin)) {\n\t\t\t\treturn\n\t\t\t}\n\t\t\tconst payload = event.data\n\t\t\tconst type = typeof payload === 'string'\n\t\t\t\t? payload\n\t\t\t\t: (payload && typeof payload === 'object' && typeof payload.type === 'string' ? payload.type : '')\n\t\t\tif (!type) {\n\t\t\t\treturn\n\t\t\t}\n\t\t\tif (type === 'epnc:host-visible') {\n\t\t\t\tpadSync.start()\n\t\t\t\treturn\n\t\t\t}\n\t\t\tif (type === 'epnc:host-hidden') {\n\t\t\t\tpadSync.fireAndForget(true, true)\n\t\t\t\tpadSync.stop()\n\t\t\t\treturn\n\t\t\t}\n\t\t\tif (type === 'epnc:host-before-close' || type === 'epnc:host-sync-now') {\n\t\t\t\tconst keepalive = type !== 'epnc:host-sync-now'\n\t\t\t\tconst reason = type === 'epnc:host-before-close' ? 'before-close' : 'sync-now'\n\t\t\t\tpostHostMessage(event.source, origin, 'epnc:sync-flush-started', {\n\t\t\t\t\treason,\n\t\t\t\t})\n\t\t\t\tvoid padSync.sync(true, keepalive)\n\t\t\t\t\t.then((result) => {\n\t\t\t\t\t\tpostHostMessage(event.source, origin, 'epnc:sync-flush-finished', {\n\t\t\t\t\t\t\treason,\n\t\t\t\t\t\t\tresult: result && typeof result === 'object' ? result : {},\n\t\t\t\t\t\t})\n\t\t\t\t\t})\n\t\t\t\t\t.catch((error) => {\n\t\t\t\t\t\tpostHostMessage(event.source, origin, 'epnc:sync-flush-failed', {\n\t\t\t\t\t\t\treason,\n\t\t\t\t\t\t\tmessage: error instanceof Error ? error.message : 'Sync failed.',\n\t\t\t\t\t\t})\n\t\t\t\t\t})\n\t\t\t\tif (keepalive) {\n\t\t\t\t\tpadSync.stop()\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\t\twindow.addEventListener('message', messageHandler)\n\t}\n\n\tconst openPad = async () => {\n\t\tconst body = new URLSearchParams()\n\t\tbody.set('fileId', String(fileId))\n\t\tconst data = await fetchJson(openByIdUrl, {\n\t\t\tmethod: 'POST',\n\t\t\theaders: {\n\t\t\t\t'Content-Type': 'application/x-www-form-urlencoded;charset=UTF-8',\n\t\t\t\trequesttoken: requestToken(),\n\t\t\t},\n\t\t\tbody: body.toString(),\n\t\t})\n\t\treturn assertOpenPayload(data)\n\t}\n\n\tconst initializePad = async () => {\n\t\tconst url = initializeByIdUrlTemplate.replace('__FILE_ID__', encodeURIComponent(String(fileId)))\n\t\t// A write: see fetchJsonWithTimeout() for why it gets no timeout.\n\t\tconst data = await fetchJson(url, {\n\t\t\tmethod: 'POST',\n\t\t\theaders: {\n\t\t\t\trequesttoken: requestToken(),\n\t\t\t},\n\t\t}, { timeoutMs: null })\n\t\tif (data && data.status === 'migrated_from_legacy') {\n\t\t\t// Mirror the backend audit-log entry to the browser console; no\n\t\t\t// toast surface is wired up in this app yet.\n\t\t\tconsole.info('Legacy Ownpad .pad migrated to managed format on first open.')\n\t\t}\n\t}\n\n\tconst hideAllPanels = () => {\n\t\tif (loadingNode instanceof HTMLElement) loadingNode.hidden = true\n\t\tif (errorNode instanceof HTMLElement) errorNode.hidden = true\n\t\tif (recoveryNode instanceof HTMLElement) recoveryNode.hidden = true\n\t\tif (iframe instanceof HTMLIFrameElement) {\n\t\t\tiframe.hidden = true\n\t\t\tiframe.removeAttribute('src')\n\t\t}\n\t}\n\n\tconst showRecoveryChecking = () => {\n\t\tif (!(recoveryNode instanceof HTMLElement)) return\n\t\thideAllPanels()\n\t\trecoveryNode.hidden = false\n\t\tif (recoveryMessageNode instanceof HTMLElement) recoveryMessageNode.textContent = recoveryCheckingText\n\t\tif (recoveryBodyNode instanceof HTMLElement) recoveryBodyNode.textContent = ''\n\t\tif (recoveryActionsNode instanceof HTMLElement) recoveryActionsNode.replaceChildren()\n\t}\n\n\tconst showRecoveryWithOriginal = (originalEmbedUrl, errorMessage) => {\n\t\tif (!(recoveryNode instanceof HTMLElement)) return\n\t\thideAllPanels()\n\t\trecoveryNode.hidden = false\n\t\tif (recoveryMessageNode instanceof HTMLElement) recoveryMessageNode.textContent = errorMessage\n\t\tif (recoveryBodyNode instanceof HTMLElement) recoveryBodyNode.textContent = recoveryCopyBodyText\n\t\tif (recoveryActionsNode instanceof HTMLElement) {\n\t\t\tconst openLink = document.createElement('a')\n\t\t\topenLink.className = PRIMARY_BUTTON_CLASS\n\t\t\t// Stay in embed mode: load the original's embed page in the same\n\t\t\t// frame so a host iframe doesn't need to deal with a new tab.\n\t\t\topenLink.href = originalEmbedUrl\n\t\t\topenLink.textContent = recoveryOpenOriginalText\n\t\t\trecoveryActionsNode.replaceChildren(\n\t\t\t\topenLink,\n\t\t\t\tbuildButton(recoveryCreateNewText, () => { void triggerRecovery() }),\n\t\t\t)\n\t\t}\n\t}\n\n\tconst showRecoveryWithoutOriginal = (errorMessage) => {\n\t\tif (!(recoveryNode instanceof HTMLElement)) return\n\t\thideAllPanels()\n\t\trecoveryNode.hidden = false\n\t\tif (recoveryMessageNode instanceof HTMLElement) recoveryMessageNode.textContent = errorMessage\n\t\tif (recoveryBodyNode instanceof HTMLElement) recoveryBodyNode.textContent = recoveryOrphanBodyText\n\t\tif (recoveryActionsNode instanceof HTMLElement) {\n\t\t\trecoveryActionsNode.replaceChildren(\n\t\t\t\tbuildButton(recoveryCreateNewText, () => { void triggerRecovery() }, PRIMARY_BUTTON_CLASS),\n\t\t\t)\n\t\t}\n\t}\n\n\tconst setRecoveryActionsBusy = (busy) => {\n\t\tif (!(recoveryActionsNode instanceof HTMLElement)) return\n\t\tconst buttons = recoveryActionsNode.querySelectorAll('button')\n\t\tbuttons.forEach((node) => {\n\t\t\tnode.disabled = busy\n\t\t\tif (busy) {\n\t\t\t\tnode.dataset.originalLabel = node.dataset.originalLabel || node.textContent || ''\n\t\t\t\tnode.textContent = recoveryCreatingText\n\t\t\t} else if (node.dataset.originalLabel) {\n\t\t\t\tnode.textContent = node.dataset.originalLabel\n\t\t\t\tdelete node.dataset.originalLabel\n\t\t\t}\n\t\t})\n\t}\n\n\tconst triggerRecovery = async () => {\n\t\tif (recoverUrlTemplate === '') {\n\t\t\tshowError('Recovery is not available in this embed.')\n\t\t\treturn\n\t\t}\n\t\tsetRecoveryActionsBusy(true)\n\t\tconst url = recoverUrlTemplate.replace('__FILE_ID__', encodeURIComponent(String(fileId)))\n\t\ttry {\n\t\t\t// A write, like initializePad().\n\t\t\tawait fetchJson(url, {\n\t\t\t\tmethod: 'POST',\n\t\t\t\theaders: { requesttoken: requestToken() },\n\t\t\t}, { timeoutMs: null })\n\t\t\t// Open again now that the binding exists.\n\t\t\tvoid run(true)\n\t\t} catch (error) {\n\t\t\t// No answer: the pad may be set up by now, and another recovery\n\t\t\t// would meet it. Opening tells, and is safe to repeat.\n\t\t\tif (error && error.unanswered === true) {\n\t\t\t\tvoid run(true)\n\t\t\t\treturn\n\t\t\t}\n\t\t\tsetRecoveryActionsBusy(false)\n\t\t\tif (recoveryMessageNode instanceof HTMLElement) {\n\t\t\t\trecoveryMessageNode.textContent = messageOf(error, 'Recovery failed.')\n\t\t\t}\n\t\t\t// The clicked button lost the focus while it was disabled.\n\t\t\thandFocusToCard(recoveryActionsNode, recoveryMessageNode)\n\t\t}\n\t}\n\n\t/** The original's embed page, or '' when there is none or no answer. */\n\tconst findOriginalEmbedUrl = async () => {\n\t\tif (findOriginalUrlTemplate === '') {\n\t\t\treturn ''\n\t\t}\n\t\tconst lookupUrl = findOriginalUrlTemplate.replace('__FILE_ID__', encodeURIComponent(String(fileId)))\n\t\ttry {\n\t\t\tconst hint = await fetchJson(lookupUrl, { method: 'GET' })\n\t\t\tif (hint && hint.found === true && typeof hint.embed_url === 'string') {\n\t\t\t\treturn hint.embed_url\n\t\t\t}\n\t\t} catch {\n\t\t\t// Silent: the card then offers a new pad only.\n\t\t}\n\t\treturn ''\n\t}\n\n\tconst enterRecoveryFlow = async (initialError, afterClick, isCurrent) => {\n\t\tconst errorMessage = messageOf(initialError, 'Pad open failed.')\n\t\tshowRecoveryChecking()\n\t\tconst originalEmbedUrl = await findOriginalEmbedUrl()\n\t\tif (!isCurrent()) {\n\t\t\treturn\n\t\t}\n\t\tif (originalEmbedUrl !== '') {\n\t\t\tshowRecoveryWithOriginal(originalEmbedUrl, errorMessage)\n\t\t} else {\n\t\t\tshowRecoveryWithoutOriginal(errorMessage)\n\t\t}\n\t\tif (afterClick) {\n\t\t\thandFocusToCard(recoveryActionsNode, recoveryMessageNode)\n\t\t}\n\t}\n\n\t// So an open that answers late cannot undo a newer one.\n\tlet openGeneration = 0\n\n\t/** $afterClick: a second try or a recovery started it; see handFocusTo(). */\n\tconst run = async (afterClick = false) => {\n\t\topenGeneration += 1\n\t\tconst generation = openGeneration\n\t\tconst isCurrent = () => generation === openGeneration\n\t\tshowLoading()\n\t\tif (!Number.isFinite(fileId) || fileId <= 0 || openByIdUrl === '' || initializeByIdUrlTemplate === '') {\n\t\t\tshowError('Embed configuration is incomplete.')\n\t\t\treturn\n\t\t}\n\t\tif (requestToken() === '') {\n\t\t\tshowError('CSRF request token is missing.')\n\t\t\treturn\n\t\t}\n\t\ttry {\n\t\t\tconst data = await openWithFrontmatterRecovery({ open: openPad, initialize: initializePad, stillWanted: isCurrent })\n\t\t\tif (data === null || !isCurrent()) {\n\t\t\t\treturn\n\t\t\t}\n\t\t\tconst { syncUrl, intervalMs } = syncSettingsFrom(data)\n\t\t\tpadSync.configure({ syncUrl, intervalMs })\n\t\t\tpadSync.installLifecycleHandlers()\n\t\t\tinstallHostMessageHandler()\n\t\t\t// No syncing for a viewer: it writes the pad back into the .pad\n\t\t\t// file, which is exactly what a read-only share may not do.\n\t\t\tif (syncUrl !== '') {\n\t\t\t\tpadSync.start()\n\t\t\t}\n\t\t\tconst contentUrl = contentUrlFrom(data)\n\t\t\tconst { isContentView, externalUrl } = contentViewFrom(data)\n\t\t\tif (isContentView) {\n\t\t\t\tconst view = showPadContentView(externalUrl)\n\t\t\t\tif (view !== null) {\n\t\t\t\t\tview.refresh.addEventListener('click', () => { void loadContent(view, contentUrl) })\n\t\t\t\t}\n\t\t\t\tvoid loadContent(view, contentUrl)\n\t\t\t\treturn\n\t\t\t}\n\t\t\tshowIframe(padUrlFrom(data))\n\t\t} catch (error) {\n\t\t\tif (!isCurrent()) {\n\t\t\t\treturn\n\t\t\t}\n\t\t\tif (isMissingBindingError(error)) {\n\t\t\t\tvoid enterRecoveryFlow(error, afterClick, isCurrent)\n\t\t\t\treturn\n\t\t\t}\n\t\t\tshowError(messageOf(error, 'Pad open failed.'), isRetryableOpenError(error), afterClick)\n\t\t}\n\t}\n\n\tvoid 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+{"version":3,"file":"etherpad_nextcloud-embed-main.mjs","sources":["../src/embed-main.js"],"sourcesContent":["/**\n * SPDX-License-Identifier: AGPL-3.0-or-later\n * Copyright (c) 2026 Jacob Bühler\n */\nimport { ocRequestToken } from './lib/oc-compat.js'\nimport { createPadSync } from './lib/pad-sync.js'\nimport { fetchJsonWithTimeout as fetchJson, isUnanswered, requestErrorMessage } from './lib/fetch-helpers.js'\nimport { handFocusTo } from './lib/hand-focus.js'\nimport { loadPadContent } from './lib/pad-content.js'\nimport { assertOpenPayload, contentUrlFrom, contentViewFrom, isMissingBindingError, isRetryableOpenError, openWithFrontmatterRecovery, padUrlFrom, syncSettingsFrom } from './lib/pad-open-flow.js'\n\n(function () {\n\tconst IFRAME_REVEAL_DELAY_MS = 100\n\tconst BUTTON_CLASS = 'epnc-embed__recovery-button'\n\tconst PRIMARY_BUTTON_CLASS = BUTTON_CLASS + ' epnc-embed__recovery-button--primary'\n\n\tconst root = document.getElementById('etherpad-nextcloud-embed')\n\tif (!(root instanceof HTMLElement)) {\n\t\treturn\n\t}\n\n\tconst fileId = Number(root.getAttribute('data-file-id') || '')\n\tconst openByIdUrl = String(root.getAttribute('data-open-by-id-url') || '').trim()\n\tconst initializeByIdUrlTemplate = String(root.getAttribute('data-initialize-by-id-url-template') || '').trim()\n\tconst recoverUrlTemplate = String(root.getAttribute('data-recover-url-template') || '').trim()\n\tconst findOriginalUrlTemplate = String(root.getAttribute('data-find-original-url-template') || '').trim()\n\tconst templateRequestToken = String(root.getAttribute('data-request-token') || '').trim()\n\tconst trustedOrigins = String(root.getAttribute('data-trusted-origins') || '')\n\t\t.split(/\\s+/)\n\t\t.map((value) => value.trim())\n\t\t.filter(Boolean)\n\tconst loadingNode = root.querySelector('[data-epnc-embed-loading]')\n\tconst errorNode = root.querySelector('[data-epnc-embed-error]')\n\tconst errorMessageNode = root.querySelector('[data-epnc-embed-error-message]')\n\tconst errorActionsNode = root.querySelector('[data-epnc-embed-error-actions]')\n\tconst recoveryNode = root.querySelector('[data-epnc-embed-recovery]')\n\tconst recoveryMessageNode = root.querySelector('[data-epnc-embed-recovery-message]')\n\tconst recoveryBodyNode = root.querySelector('[data-epnc-embed-recovery-body]')\n\tconst recoveryActionsNode = root.querySelector('[data-epnc-embed-recovery-actions]')\n\tconst iframe = root.querySelector('[data-epnc-embed-iframe]')\n\tconst contentEmptyText = String(root.getAttribute('data-l10n-content-empty') || 'This pad is still empty.').trim()\n\tconst contentLoadingText = String(root.getAttribute('data-l10n-content-loading') || 'Loading pad content...').trim()\n\tconst contentErrorText = String(root.getAttribute('data-l10n-content-error') || 'Could not load the pad content.').trim()\n\tconst contentNoUrlText = String(root.getAttribute('data-l10n-content-no-url') || 'The server did not say where to load this pad from.').trim()\n\tconst contentRetryText = String(root.getAttribute('data-l10n-content-retry') || 'Try again').trim()\n\tconst contentRefreshText = String(root.getAttribute('data-l10n-content-refresh') || 'Refresh').trim()\n\tconst contentRefreshingText = String(root.getAttribute('data-l10n-content-refreshing') || 'Refreshing...').trim()\n\tconst externalLinkText = String(root.getAttribute('data-l10n-external-link') || 'Open original pad').trim()\n\tconst recoveryCheckingText = String(root.getAttribute('data-l10n-recovery-checking') || 'Checking for the original pad...').trim()\n\tconst recoveryCopyBodyText = String(root.getAttribute('data-l10n-recovery-copy-body') || '').trim()\n\tconst recoveryOrphanBodyText = String(root.getAttribute('data-l10n-recovery-orphan-body') || '').trim()\n\tconst recoveryOpenOriginalText = String(root.getAttribute('data-l10n-recovery-open-original') || 'Open the original .pad file').trim()\n\tconst recoveryCreateNewText = String(root.getAttribute('data-l10n-recovery-create-new') || 'Create new pad from this file').trim()\n\tconst recoveryCreatingText = String(root.getAttribute('data-l10n-recovery-creating') || 'Creating new pad...').trim()\n\tconst unansweredText = String(root.getAttribute('data-l10n-unanswered') || 'Nextcloud did not answer. Check your connection and try again.').trim()\n\tlet messageHandler = null\n\n\tconst requestToken = () => ocRequestToken(templateRequestToken)\n\tconst padSync = createPadSync({ requestToken })\n\n\tconst messageOf = (error, fallback) => requestErrorMessage(error, unansweredText, fallback)\n\t// The page sits in another one, which must not scroll to it.\n\tconst handFocusToCard = (actionsNode, messageNode) => handFocusTo(actionsNode, messageNode, { preventScroll: true })\n\n\t/** Every button of this page: the content's retry, the error panel's, the recovery card's. */\n\tconst buildButton = (label, onClick, className = BUTTON_CLASS) => {\n\t\tconst button = document.createElement('button')\n\t\tbutton.type = 'button'\n\t\tbutton.className = className\n\t\tbutton.textContent = label\n\t\tbutton.addEventListener('click', onClick)\n\t\treturn button\n\t}\n\n\t/**\n\t * $canRetry: the open may work later (`isRetryableOpenError`), so the\n\t * panel offers to run it again rather than a dead end. $afterClick: see\n\t * handFocusTo().\n\t */\n\tconst showError = (message, canRetry = false, afterClick = false) => {\n\t\thideAllPanels()\n\t\tif (errorMessageNode instanceof HTMLElement) {\n\t\t\terrorMessageNode.textContent = String(message || 'Unknown error.')\n\t\t}\n\t\tif (errorActionsNode instanceof HTMLElement) {\n\t\t\terrorActionsNode.replaceChildren()\n\t\t\tif (canRetry) {\n\t\t\t\terrorActionsNode.appendChild(buildButton(contentRetryText, () => { void run(true) }, PRIMARY_BUTTON_CLASS))\n\t\t\t}\n\t\t}\n\t\tif (errorNode instanceof HTMLElement) {\n\t\t\terrorNode.hidden = false\n\t\t}\n\t\tif (afterClick) {\n\t\t\thandFocusToCard(errorActionsNode, errorMessageNode)\n\t\t}\n\t}\n\n\t/** Every panel away and the loading state up: where every open starts. */\n\tconst showLoading = () => {\n\t\thideAllPanels()\n\t\tif (loadingNode instanceof HTMLElement) {\n\t\t\tloadingNode.classList.remove('epnc-embed__loading--pad-doc')\n\t\t\tloadingNode.hidden = false\n\t\t}\n\t}\n\n\t/**\n\t * The read-only surface: a small toolbar and a document area that\n\t * `loadContent` fills. Returns the parts the loader redraws, so the\n\t * frame and its button survive a refresh.\n\t */\n\tconst showPadContentView = (url) => {\n\t\tif (!(loadingNode instanceof HTMLElement)) {\n\t\t\treturn null\n\t\t}\n\t\tloadingNode.classList.add('epnc-embed__loading--pad-doc')\n\t\tloadingNode.textContent = ''\n\n\t\tconst surface = document.createElement('div')\n\t\tsurface.className = 'epnc-pad-doc'\n\n\t\tconst inner = document.createElement('div')\n\t\tinner.className = 'epnc-pad-doc__inner'\n\n\t\tconst toolbar = document.createElement('div')\n\t\ttoolbar.className = 'epnc-pad-doc__toolbar'\n\n\t\t// A failed refresh is reported here rather than in place of the pad.\n\t\tconst toolbarError = document.createElement('span')\n\t\ttoolbarError.className = 'epnc-pad-doc__toolbar-error'\n\t\ttoolbarError.hidden = true\n\t\ttoolbar.appendChild(toolbarError)\n\n\t\tconst refresh = document.createElement('button')\n\t\trefresh.type = 'button'\n\t\trefresh.className = 'button epnc-pad-doc__refresh'\n\t\trefresh.textContent = contentRefreshText\n\t\ttoolbar.appendChild(refresh)\n\n\t\t// A read-only share has nothing to link to: the pad it would point\n\t\t// at is the one being withheld.\n\t\tif (String(url || '').trim() !== '') {\n\t\t\tconst link = document.createElement('a')\n\t\t\tlink.className = 'button epnc-pad-doc__link'\n\t\t\tlink.href = url\n\t\t\tlink.target = '_blank'\n\t\t\tlink.rel = 'noopener noreferrer'\n\t\t\tlink.textContent = externalLinkText\n\t\t\ttoolbar.appendChild(link)\n\t\t}\n\n\t\tconst body = document.createElement('div')\n\t\tbody.className = 'epnc-pad-doc__text'\n\t\tbody.textContent = contentLoadingText\n\n\t\tinner.appendChild(toolbar)\n\t\tinner.appendChild(body)\n\t\tsurface.appendChild(inner)\n\t\tloadingNode.appendChild(surface)\n\n\t\t// `loaded`: \"busy\" and \"nothing yet\" are two states, and only the\n\t\t// second may blank the view.\n\t\treturn { body, refresh, toolbarError, loaded: false }\n\t}\n\n\t// So a slower earlier answer cannot land on top of a newer one.\n\tlet contentGeneration = 0\n\n\t/** Each call re-checks access on the server. */\n\tconst loadContent = async (view, contentUrl) => {\n\t\tif (!view || !(view.body instanceof HTMLElement)) {\n\t\t\treturn\n\t\t}\n\t\tconst { body, refresh, toolbarError } = view\n\t\tcontentGeneration += 1\n\t\tconst generation = contentGeneration\n\t\tconst isCurrent = () => generation === contentGeneration\n\n\t\t// Only before the first answer; after that the button carries it.\n\t\tif (!view.loaded) {\n\t\t\tbody.className = 'epnc-pad-doc__text'\n\t\t\tbody.textContent = contentLoadingText\n\t\t}\n\t\tif (toolbarError instanceof HTMLElement) {\n\t\t\ttoolbarError.hidden = true\n\t\t}\n\t\tif (refresh instanceof HTMLButtonElement) {\n\t\t\trefresh.disabled = true\n\t\t\trefresh.textContent = contentRefreshingText\n\t\t}\n\n\t\ttry {\n\t\t\tif (contentUrl === '') {\n\t\t\t\t// Retrying cannot help, so the message says what is actually\n\t\t\t\t// wrong instead of inviting another press.\n\t\t\t\trenderContentError(view, contentUrl, contentNoUrlText, false)\n\t\t\t\treturn\n\t\t\t}\n\t\t\tconst content = await loadPadContent(contentUrl)\n\t\t\tif (!isCurrent()) return\n\t\t\tview.loaded = true\n\t\t\tif (content.isEmpty) {\n\t\t\t\t// Left blank this would read as a failure nobody reported.\n\t\t\t\tbody.className = 'epnc-pad-doc__text'\n\t\t\t\tbody.textContent = contentEmptyText\n\t\t\t\treturn\n\t\t\t}\n\t\t\tbody.className = 'epnc-pad-doc__text epnc-pad-doc__text--html'\n\t\t\tbody.innerHTML = content.html\n\t\t} catch (error) {\n\t\t\tif (!isCurrent()) return\n\t\t\trenderContentError(view, contentUrl, messageOf(error, contentErrorText))\n\t\t} finally {\n\t\t\tif (isCurrent() && refresh instanceof HTMLButtonElement) {\n\t\t\t\trefresh.disabled = false\n\t\t\t\trefresh.textContent = contentRefreshText\n\t\t\t}\n\t\t}\n\t}\n\n\tconst renderContentError = (view, contentUrl, message, canRetry = true) => {\n\t\tconst { body, toolbarError } = view\n\t\t// Something is on screen: keep it, and say the attempt failed.\n\t\tif (view.loaded && toolbarError instanceof HTMLElement) {\n\t\t\ttoolbarError.textContent = message || contentErrorText\n\t\t\ttoolbarError.hidden = false\n\t\t\treturn\n\t\t}\n\t\tbody.className = 'epnc-pad-doc__text'\n\t\tbody.textContent = ''\n\n\t\tconst text = document.createElement('p')\n\t\ttext.textContent = message || contentErrorText\n\n\t\tbody.appendChild(text)\n\t\tif (canRetry) {\n\t\t\tbody.appendChild(buildButton(contentRetryText, () => { void loadContent(view, contentUrl) }, 'button primary'))\n\t\t}\n\t}\n\n\tconst showIframe = (url) => {\n\t\tif (!(iframe instanceof HTMLIFrameElement)) {\n\t\t\tshowError('Embed iframe is not available.')\n\t\t\treturn\n\t\t}\n\t\t// The loading state the open started from stays up until the pad has loaded.\n\t\tconst revealIframe = () => {\n\t\t\tiframe.removeEventListener('load', revealIframe)\n\t\t\twindow.setTimeout(() => {\n\t\t\t\tif (loadingNode instanceof HTMLElement) {\n\t\t\t\t\tloadingNode.hidden = true\n\t\t\t\t}\n\t\t\t\tiframe.hidden = false\n\t\t\t}, IFRAME_REVEAL_DELAY_MS)\n\t\t}\n\t\tiframe.addEventListener('load', revealIframe, { once: true })\n\t\tiframe.src = url\n\t}\n\n\tconst postHostMessage = (source, origin, type, payload = {}) => {\n\t\t// Replies are only sent from the already origin-validated message handler.\n\t\tif (!source || typeof source.postMessage !== 'function') {\n\t\t\treturn\n\t\t}\n\t\tsource.postMessage(Object.assign({\n\t\t\ttype,\n\t\t\tfileId,\n\t\t}, payload), origin)\n\t}\n\n\tconst isAllowedMessageOrigin = (origin) => {\n\t\tif (!origin || origin === 'null') {\n\t\t\treturn false\n\t\t}\n\t\tif (origin === window.location.origin) {\n\t\t\treturn true\n\t\t}\n\t\treturn trustedOrigins.includes(origin)\n\t}\n\n\tconst installHostMessageHandler = () => {\n\t\tif (messageHandler) {\n\t\t\treturn\n\t\t}\n\t\tmessageHandler = (event) => {\n\t\t\tconst origin = String(event.origin || '')\n\t\t\tif (!isAllowedMessageOrigin(origin)) {\n\t\t\t\treturn\n\t\t\t}\n\t\t\tconst payload = event.data\n\t\t\tconst type = typeof payload === 'string'\n\t\t\t\t? payload\n\t\t\t\t: (payload && typeof payload === 'object' && typeof payload.type === 'string' ? payload.type : '')\n\t\t\tif (!type) {\n\t\t\t\treturn\n\t\t\t}\n\t\t\tif (type === 'epnc:host-visible') {\n\t\t\t\tpadSync.start()\n\t\t\t\treturn\n\t\t\t}\n\t\t\tif (type === 'epnc:host-hidden') {\n\t\t\t\tpadSync.fireAndForget(true, true)\n\t\t\t\tpadSync.stop()\n\t\t\t\treturn\n\t\t\t}\n\t\t\tif (type === 'epnc:host-before-close' || type === 'epnc:host-sync-now') {\n\t\t\t\tconst keepalive = type !== 'epnc:host-sync-now'\n\t\t\t\tconst reason = type === 'epnc:host-before-close' ? 'before-close' : 'sync-now'\n\t\t\t\tpostHostMessage(event.source, origin, 'epnc:sync-flush-started', {\n\t\t\t\t\treason,\n\t\t\t\t})\n\t\t\t\tvoid padSync.sync(true, keepalive)\n\t\t\t\t\t.then((result) => {\n\t\t\t\t\t\tpostHostMessage(event.source, origin, 'epnc:sync-flush-finished', {\n\t\t\t\t\t\t\treason,\n\t\t\t\t\t\t\tresult: result && typeof result === 'object' ? result : {},\n\t\t\t\t\t\t})\n\t\t\t\t\t})\n\t\t\t\t\t.catch((error) => {\n\t\t\t\t\t\tpostHostMessage(event.source, origin, 'epnc:sync-flush-failed', {\n\t\t\t\t\t\t\treason,\n\t\t\t\t\t\t\tmessage: error instanceof Error ? error.message : 'Sync failed.',\n\t\t\t\t\t\t})\n\t\t\t\t\t})\n\t\t\t\tif (keepalive) {\n\t\t\t\t\tpadSync.stop()\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\t\twindow.addEventListener('message', messageHandler)\n\t}\n\n\tconst openPad = async () => {\n\t\tconst body = new URLSearchParams()\n\t\tbody.set('fileId', String(fileId))\n\t\tconst data = await fetchJson(openByIdUrl, {\n\t\t\tmethod: 'POST',\n\t\t\theaders: {\n\t\t\t\t'Content-Type': 'application/x-www-form-urlencoded;charset=UTF-8',\n\t\t\t\trequesttoken: requestToken(),\n\t\t\t},\n\t\t\tbody: body.toString(),\n\t\t})\n\t\treturn assertOpenPayload(data)\n\t}\n\n\tconst initializePad = async () => {\n\t\tconst url = initializeByIdUrlTemplate.replace('__FILE_ID__', encodeURIComponent(String(fileId)))\n\t\t// A write: see fetchJsonWithTimeout() for why it gets no timeout.\n\t\tconst data = await fetchJson(url, {\n\t\t\tmethod: 'POST',\n\t\t\theaders: {\n\t\t\t\trequesttoken: requestToken(),\n\t\t\t},\n\t\t}, { timeoutMs: null })\n\t\tif (data && data.status === 'migrated_from_legacy') {\n\t\t\t// Mirror the backend audit-log entry to the browser console; no\n\t\t\t// toast surface is wired up in this app yet.\n\t\t\tconsole.info('Legacy Ownpad .pad migrated to managed format on first open.')\n\t\t}\n\t}\n\n\tconst hideAllPanels = () => {\n\t\tif (loadingNode instanceof HTMLElement) loadingNode.hidden = true\n\t\tif (errorNode instanceof HTMLElement) errorNode.hidden = true\n\t\tif (recoveryNode instanceof HTMLElement) recoveryNode.hidden = true\n\t\tif (iframe instanceof HTMLIFrameElement) {\n\t\t\tiframe.hidden = true\n\t\t\tiframe.removeAttribute('src')\n\t\t}\n\t}\n\n\tconst showRecoveryChecking = () => {\n\t\tif (!(recoveryNode instanceof HTMLElement)) return\n\t\thideAllPanels()\n\t\trecoveryNode.hidden = false\n\t\tif (recoveryMessageNode instanceof HTMLElement) recoveryMessageNode.textContent = recoveryCheckingText\n\t\tif (recoveryBodyNode instanceof HTMLElement) recoveryBodyNode.textContent = ''\n\t\tif (recoveryActionsNode instanceof HTMLElement) recoveryActionsNode.replaceChildren()\n\t}\n\n\tconst showRecoveryWithOriginal = (originalEmbedUrl, errorMessage) => {\n\t\tif (!(recoveryNode instanceof HTMLElement)) return\n\t\thideAllPanels()\n\t\trecoveryNode.hidden = false\n\t\tif (recoveryMessageNode instanceof HTMLElement) recoveryMessageNode.textContent = errorMessage\n\t\tif (recoveryBodyNode instanceof HTMLElement) recoveryBodyNode.textContent = recoveryCopyBodyText\n\t\tif (recoveryActionsNode instanceof HTMLElement) {\n\t\t\tconst openLink = document.createElement('a')\n\t\t\topenLink.className = PRIMARY_BUTTON_CLASS\n\t\t\t// Stay in embed mode: load the original's embed page in the same\n\t\t\t// frame so a host iframe doesn't need to deal with a new tab.\n\t\t\topenLink.href = originalEmbedUrl\n\t\t\topenLink.textContent = recoveryOpenOriginalText\n\t\t\trecoveryActionsNode.replaceChildren(\n\t\t\t\topenLink,\n\t\t\t\tbuildButton(recoveryCreateNewText, () => { void triggerRecovery() }),\n\t\t\t)\n\t\t}\n\t}\n\n\tconst showRecoveryWithoutOriginal = (errorMessage) => {\n\t\tif (!(recoveryNode instanceof HTMLElement)) return\n\t\thideAllPanels()\n\t\trecoveryNode.hidden = false\n\t\tif (recoveryMessageNode instanceof HTMLElement) recoveryMessageNode.textContent = errorMessage\n\t\tif (recoveryBodyNode instanceof HTMLElement) recoveryBodyNode.textContent = recoveryOrphanBodyText\n\t\tif (recoveryActionsNode instanceof HTMLElement) {\n\t\t\trecoveryActionsNode.replaceChildren(\n\t\t\t\tbuildButton(recoveryCreateNewText, () => { void triggerRecovery() }, PRIMARY_BUTTON_CLASS),\n\t\t\t)\n\t\t}\n\t}\n\n\tconst setRecoveryActionsBusy = (busy) => {\n\t\tif (!(recoveryActionsNode instanceof HTMLElement)) return\n\t\tconst buttons = recoveryActionsNode.querySelectorAll('button')\n\t\tbuttons.forEach((node) => {\n\t\t\tnode.disabled = busy\n\t\t\tif (busy) {\n\t\t\t\tnode.dataset.originalLabel = node.dataset.originalLabel || node.textContent || ''\n\t\t\t\tnode.textContent = recoveryCreatingText\n\t\t\t} else if (node.dataset.originalLabel) {\n\t\t\t\tnode.textContent = node.dataset.originalLabel\n\t\t\t\tdelete node.dataset.originalLabel\n\t\t\t}\n\t\t})\n\t}\n\n\tconst triggerRecovery = async () => {\n\t\tif (recoverUrlTemplate === '') {\n\t\t\tshowError('Recovery is not available in this embed.')\n\t\t\treturn\n\t\t}\n\t\tsetRecoveryActionsBusy(true)\n\t\tconst url = recoverUrlTemplate.replace('__FILE_ID__', encodeURIComponent(String(fileId)))\n\t\ttry {\n\t\t\t// A write, like initializePad().\n\t\t\tawait fetchJson(url, {\n\t\t\t\tmethod: 'POST',\n\t\t\t\theaders: { requesttoken: requestToken() },\n\t\t\t}, { timeoutMs: null })\n\t\t\t// Open again now that the binding exists.\n\t\t\tvoid run(true)\n\t\t} catch (error) {\n\t\t\t// No answer: the pad may be set up by now, and another recovery\n\t\t\t// would meet it. Opening tells, and is safe to repeat.\n\t\t\tif (isUnanswered(error)) {\n\t\t\t\tvoid run(true)\n\t\t\t\treturn\n\t\t\t}\n\t\t\tsetRecoveryActionsBusy(false)\n\t\t\tif (recoveryMessageNode instanceof HTMLElement) {\n\t\t\t\trecoveryMessageNode.textContent = messageOf(error, 'Recovery failed.')\n\t\t\t}\n\t\t\t// The clicked button lost the focus while it was disabled.\n\t\t\thandFocusToCard(recoveryActionsNode, recoveryMessageNode)\n\t\t}\n\t}\n\n\t/** The original's embed page, or '' when there is none or no answer. */\n\tconst findOriginalEmbedUrl = async () => {\n\t\tif (findOriginalUrlTemplate === '') {\n\t\t\treturn ''\n\t\t}\n\t\tconst lookupUrl = findOriginalUrlTemplate.replace('__FILE_ID__', encodeURIComponent(String(fileId)))\n\t\ttry {\n\t\t\tconst hint = await fetchJson(lookupUrl, { method: 'GET' })\n\t\t\tif (hint && hint.found === true && typeof hint.embed_url === 'string') {\n\t\t\t\treturn hint.embed_url\n\t\t\t}\n\t\t} catch {\n\t\t\t// Silent: the card then offers a new pad only.\n\t\t}\n\t\treturn ''\n\t}\n\n\tconst enterRecoveryFlow = async (initialError, afterClick, isCurrent) => {\n\t\tconst errorMessage = messageOf(initialError, 'Pad open failed.')\n\t\tshowRecoveryChecking()\n\t\tconst originalEmbedUrl = await findOriginalEmbedUrl()\n\t\tif (!isCurrent()) {\n\t\t\treturn\n\t\t}\n\t\tif (originalEmbedUrl !== '') {\n\t\t\tshowRecoveryWithOriginal(originalEmbedUrl, errorMessage)\n\t\t} else {\n\t\t\tshowRecoveryWithoutOriginal(errorMessage)\n\t\t}\n\t\tif (afterClick) {\n\t\t\thandFocusToCard(recoveryActionsNode, recoveryMessageNode)\n\t\t}\n\t}\n\n\t// So an open that answers late cannot undo a newer one.\n\tlet openGeneration = 0\n\n\t/** $afterClick: a second try or a recovery started it; see handFocusTo(). */\n\tconst run = async (afterClick = false) => {\n\t\topenGeneration += 1\n\t\tconst generation = openGeneration\n\t\tconst isCurrent = () => generation === openGeneration\n\t\tshowLoading()\n\t\tif (!Number.isFinite(fileId) || fileId <= 0 || openByIdUrl === '' || initializeByIdUrlTemplate === '') {\n\t\t\tshowError('Embed configuration is incomplete.')\n\t\t\treturn\n\t\t}\n\t\tif (requestToken() === '') {\n\t\t\tshowError('CSRF request token is missing.')\n\t\t\treturn\n\t\t}\n\t\ttry {\n\t\t\tconst data = await openWithFrontmatterRecovery({ open: openPad, initialize: initializePad, stillWanted: isCurrent })\n\t\t\tif (data === null || !isCurrent()) {\n\t\t\t\treturn\n\t\t\t}\n\t\t\tconst { syncUrl, intervalMs } = syncSettingsFrom(data)\n\t\t\tpadSync.configure({ syncUrl, intervalMs })\n\t\t\tpadSync.installLifecycleHandlers()\n\t\t\tinstallHostMessageHandler()\n\t\t\t// No syncing for a viewer: it writes the pad back into the .pad\n\t\t\t// file, which is exactly what a read-only share may not do.\n\t\t\tif (syncUrl !== '') {\n\t\t\t\tpadSync.start()\n\t\t\t}\n\t\t\tconst contentUrl = contentUrlFrom(data)\n\t\t\tconst { isContentView, externalUrl } = contentViewFrom(data)\n\t\t\tif (isContentView) {\n\t\t\t\tconst view = showPadContentView(externalUrl)\n\t\t\t\tif (view !== null) {\n\t\t\t\t\tview.refresh.addEventListener('click', () => { void loadContent(view, contentUrl) })\n\t\t\t\t}\n\t\t\t\tvoid loadContent(view, contentUrl)\n\t\t\t\treturn\n\t\t\t}\n\t\t\tshowIframe(padUrlFrom(data))\n\t\t} catch (error) {\n\t\t\tif (!isCurrent()) {\n\t\t\t\treturn\n\t\t\t}\n\t\t\tif (isMissingBindingError(error)) {\n\t\t\t\tvoid enterRecoveryFlow(error, afterClick, isCurrent)\n\t\t\t\treturn\n\t\t\t}\n\t\t\tshowError(messageOf(error, 'Pad open failed.'), isRetryableOpenError(error), afterClick)\n\t\t}\n\t}\n\n\tvoid 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\ No newline at end of file
diff --git a/js/etherpad_nextcloud-viewer-init.mjs b/js/etherpad_nextcloud-viewer-init.mjs
index 6c440e6c..27ba6b80 100644
--- a/js/etherpad_nextcloud-viewer-init.mjs
+++ b/js/etherpad_nextcloud-viewer-init.mjs
@@ -1,2 +1,2 @@
-import{a as p,f,o as v,A as u,t as o,r as R,M as k,V as U}from"./fetch-helpers-Dqr3YYFE.chunk.mjs";import{l as E,o as T,s as L,c as A,a as x,p as M,b as q,i as _,e as G,h as N,d as j}from"./pad-open-flow-D6KDQoVq.chunk.mjs";import{p as z,i as m,a as H}from"./urls-Pchbg185.chunk.mjs";function $(t){if(V(t),window._oca_viewer_handlers??(window._oca_viewer_handlers=new Map),window._oca_viewer_handlers.has(t.id)){console.warn(`Handler with id ${t.id} is already registered.`);return}window._oca_viewer_handlers.set(t.id,t)}function V(t){const{id:e,mimes:n,mimesAliases:i,component:a}=t;if(!e||e.trim()===""||typeof e!="string")throw new Error("The handler does not have a valid id");if((!n||!Array.isArray(n))&&!i)throw new Error("Handler needs a valid mime array or mimesAliases");if(!a||typeof a!="object"&&typeof a!="function")throw new Error("The handler does not have a valid component")}const d=new Map,W=50,D=300*1e3,B=async(t,{bypassCache:e=!1}={})=>{const n="path:"+String(t),i=e?null:J(n);if(i!==null)return i;const a=p("/apps/"+u+"/api/v1/pads/resolve")+"?file="+encodeURIComponent(t),c=I(a,{method:"GET",headers:{Accept:"application/json"}},"Pad resolve by path failed.").catch(s=>{throw d.delete(n),s});return Q(n,c),c},K=async t=>{const e=p("/apps/"+u+"/api/v1/pads/find-original/"+encodeURIComponent(String(t)));return I(e,{method:"GET",headers:{Accept:"application/json"}},"Lookup failed.")},Y=async(t,e="")=>{const n=p("/apps/"+u+"/api/v1/pads/recover-from-snapshot/"+encodeURIComponent(String(t))),i=await f(n,{method:"POST",headers:{Accept:"application/json",requesttoken:v()}},{fallbackMessage:"Recovery failed.",timeoutMs:null});return typeof e=="string"&&e!==""&&d.delete("path:"+e),i},J=t=>{const e=d.get(t);return e?Date.now()-e.createdAt>D?(d.delete(t),null):e.request:null},Q=(t,e)=>{if(!d.has(t)&&d.size>=W){const n=d.keys().next().value;n!==void 0&&d.delete(n)}d.set(t,{createdAt:Date.now(),request:e})},I=async(t,e,n)=>f(t,e,{fallbackMessage:n}),C=t=>String(t||"").replace(/&/g,"&amp;").replace(/"/g,"&quot;").replace(/</g,"&lt;").replace(/>/g,"&gt;"),X=["http:","https:"],Z=t=>{try{const e=new URL(String(t||""));return X.includes(e.protocol)&&e.username===""&&e.password===""}catch{return!1}},tt="default-src 'none'; frame-src http: https:; style-src 'unsafe-inline'",et=t=>{const e=Z(t)?C(t):"";return'<!doctype html><html><head><meta charset="utf-8"><meta http-equiv="Content-Security-Policy" content="'+C(tt)+'"><style>html,body,iframe{width:100%;height:100%;margin:0;border:0;overflow:hidden}iframe{display:block}</style></head><body><iframe src="'+e+'" title="Etherpad"></iframe></body></html>'},w=(t,e)=>R(t,o("Nextcloud did not answer. Check your connection and try again."),e),nt={name:"EtherpadNextcloudViewer",props:{filename:{type:String,required:!1,default:""},basename:{type:String,required:!1,default:""},source:{type:String,required:!1,default:""},fileid:{type:[String,Number],required:!1,default:null},fileId:{type:[String,Number],required:!1,default:null},fileInfo:{type:Object,required:!1,default:null}},data(){return{iframeSrc:"",isLoading:!0,loadError:"",canRecover:!1,canRetryOpen:!1,maybeStaleFileId:!1,recoveryFileId:null,recoveryPath:"",isRecovering:!1,isCheckingOriginal:!1,originalPad:null,externalOpenUrl:"",contentMode:"",contentUrl:"",contentState:"idle",contentError:"",content:{html:"",isEmpty:!1},contentLoaded:!1,contentGeneration:0,resolveGeneration:0}},computed:{sourcePath(){const t=typeof this.source=="string"?this.source.trim():"";return t&&H(t)||""},filePath(){const t=r=>!r||r==="/"?"/":r.startsWith("/")?r:"/"+r,e=(r,l)=>{if(!l)return"";if(l.startsWith("/"))return l;const y=t(r);return y==="/"?"/"+l:y+"/"+l};if(m(this.sourcePath))return this.sourcePath;const n=this.fileInfo&&typeof this.fileInfo=="object"?this.fileInfo:null,i=n&&typeof n.path=="string"?n.path:"";if(m(i))return i.startsWith("/")?i:"/"+i;const a=String(this.filename||this.basename||n&&(n.name||n.basename)||"");if(!a)return"";const c=n&&typeof n.dirname=="string"?n.dirname:"";if(c){const r=e(c,a);if(m(r))return r}const s=new URLSearchParams(window.location.search||"").get("dir")||"/",h=e(s,a);return m(h)?h:"/"+a},openKey(){return`${this.resolvedFileId===null?"":this.resolvedFileId}::${this.filePath}`},resolvedFileId(){const t=[this.fileid,this.fileId,this.fileInfo&&(this.fileInfo.fileid||this.fileInfo.fileId||this.fileInfo.id)];for(const e of t){const n=Number(e);if(Number.isFinite(n)&&n>0)return n}return null}},watch:{openKey:{immediate:!0,handler(){this.resolveOpenUrl()}}},methods:{async fetchOpenPayload(t,e={}){return j(await f(t,Object.assign({method:"GET"},e)))},async initializeMissingFrontmatter(){const t={Accept:"application/json",requesttoken:v()},e={timeoutMs:null,fallbackMessage:"Pad initialization failed."},n=s=>{s&&s.status==="migrated_from_legacy"&&console.info("Legacy Ownpad .pad migrated to managed format on first open.")};if(this.resolvedFileId!==null){const s=p("/apps/"+u+"/api/v1/pads/initialize-by-id/"+encodeURIComponent(String(this.resolvedFileId))),h=await f(s,{method:"POST",headers:t},e);return n(h),h}if(!this.filePath)throw new Error("Pad initialization failed: missing file path.");const i=new URLSearchParams;i.set("file",this.filePath);const a=p("/apps/"+u+"/api/v1/pads/initialize"),c=await f(a,{method:"POST",headers:Object.assign({},t,{"Content-Type":"application/x-www-form-urlencoded;charset=UTF-8"}),body:i.toString()},e);return n(c),c},async resolveRecoveryFileId(t){try{const e=await B(t,{bypassCache:!0}),n=Number(e&&e.file_id);return Number.isFinite(n)&&n>0?n:null}catch{return null}},markLoaded(){this.$emit("update:loaded",!0)},handFocusToErrorCard(){this.$nextTick(()=>{const t=this.$refs.errorCard;t instanceof HTMLElement&&N(t,t.querySelector(".epnc-native-error-message"))})},padSync(){return this._padSync||(this._padSync=G({requestToken:()=>v()})),this._padSync},teardownSync(){this._padSync&&(this._padSync.fireAndForget(!0,!0),this._padSync.stop(),this._padSync.removeLifecycleHandlers())},async resolveOpenUrl(t=!1){const e=++this.resolveGeneration,n=()=>e===this.resolveGeneration;this._openAbort?.abort();const i=typeof AbortController=="function"?new AbortController:null;if(this._openAbort=i,this.isLoading=!0,this.loadError="",this.canRecover=!1,this.canRetryOpen=!1,this.maybeStaleFileId=!1,this.recoveryFileId=null,this.recoveryPath="",this.isCheckingOriginal=!1,this.originalPad=null,this.iframeSrc="",this.externalOpenUrl="",this.contentMode="",this.contentUrl="",this.contentState="idle",this.contentError="",this.content={html:"",isEmpty:!1},this.contentLoaded=!1,this._contentAbort?.abort(),this._padSync&&(this._padSync.stop(),this._padSync.configure({syncUrl:""})),!this.filePath){if(!n())return;this.loadError="No .pad file selected.",this.isLoading=!1;return}const a=this.filePath,c=z(),s=(()=>{if(!c)return"";const r=new URL(p("/apps/"+u+"/api/v1/public/open/"+encodeURIComponent(c)),window.location.origin);return this.resolvedFileId!==null?r.searchParams.set("fileId",String(this.resolvedFileId)):r.searchParams.set("file",a),r.toString()})(),h={"Content-Type":"application/x-www-form-urlencoded;charset=UTF-8",requesttoken:v()};try{const r=await T({open:async()=>{const g=i?i.signal:void 0;if(s)return await this.fetchOpenPayload(s,{signal:g});if(this.resolvedFileId!==null){const S=new URLSearchParams;return S.set("fileId",String(this.resolvedFileId)),await this.fetchOpenPayload(p("/apps/"+u+"/api/v1/pads/open-by-id"),{method:"POST",headers:h,body:S.toString(),signal:g})}const b=new URLSearchParams;return b.set("file",a),await this.fetchOpenPayload(p("/apps/"+u+"/api/v1/pads/open"),{method:"POST",headers:h,body:b.toString(),signal:g})},initialize:()=>this.initializeMissingFrontmatter(),stillWanted:n});if(r===null||!n())return;const{syncUrl:l,intervalMs:y}=L(r);this.padSync().configure({syncUrl:l,intervalMs:y}),this.padSync().installLifecycleHandlers(),l&&this.padSync().start();const P=A(r),{isContentView:F,externalUrl:O}=x(r);if(F){this.externalOpenUrl=O,this.contentUrl=P,this.contentMode="content",this.markLoaded(),this.loadContent();return}this.iframeSrc=M(r),this.markLoaded()}catch(r){if(!n())return;this.loadError=w(r,"Could not load pad."),this.maybeStaleFileId=this.resolvedFileId!==null&&!!r&&r.status===404&&!r.code,this.canRetryOpen=q(r);let l=this.resolvedFileId;if(this.recoveryPath=a,l===null&&!s&&_(r)&&(l=await this.resolveRecoveryFileId(a),!n()))return;this.recoveryFileId=l,this.canRecover=_(r)&&l!==null&&!s,this.canRecover?this.fetchOriginalPadHint(n,t):t&&this.handFocusToErrorCard(),this.markLoaded()}finally{if(!n())return;this.isLoading=!1}},async fetchOriginalPadHint(t,e=!1){if(this.recoveryFileId!==null){this.isCheckingOriginal=!0;try{const n=await K(this.recoveryFileId);if(!t())return;n&&n.found===!0&&typeof n.viewer_url=="string"&&n.viewer_url!==""&&(this.originalPad={viewerUrl:n.viewer_url,path:typeof n.path=="string"?n.path:""})}catch{}finally{t()&&(this.isCheckingOriginal=!1,e&&this.handFocusToErrorCard())}}},async recoverFromSnapshot(){if(!(!this.canRecover||this.isRecovering||this.recoveryFileId===null)){this.isRecovering=!0;try{await Y(this.recoveryFileId,this.recoveryPath),this.loadError="",this.canRecover=!1,await this.resolveOpenUrl(!0)}catch(t){if(t&&t.unanswered===!0){await this.resolveOpenUrl(!0);return}this.isRecovering=!1,this.loadError=w(t,"Could not load pad."),this.handFocusToErrorCard()}finally{this.isRecovering=!1}}},async loadContent(){const t=this.resolveGeneration;this.contentGeneration+=1;const e=this.contentGeneration,n=()=>e===this.contentGeneration&&t===this.resolveGeneration;if(this.contentUrl===""){this.contentState="error",this.contentError=o("The server did not say where to load this pad from.");return}this._contentAbort?.abort();const i=typeof AbortController=="function"?new AbortController:null;this._contentAbort=i,this.contentState="loading",this.contentError="";try{const a=await E(this.contentUrl,{signal:i?.signal});if(!n())return;this.content=a,this.contentLoaded=!0,this.contentState="ready"}catch(a){if(!n()||a&&a.name==="AbortError")return;this.contentState="error",this.contentError=w(a,o("Could not load the pad content."))}},renderContentView(t,e){const n=Array.isArray(e.actions)?e.actions:[],i=this.contentState==="loading";return t("div",{class:"epnc-pad-doc"},[t("div",{class:"epnc-pad-doc__inner"},[t("div",{class:"epnc-pad-doc__toolbar"},[this.contentState==="error"&&this.contentLoaded?t("span",{class:"epnc-pad-doc__toolbar-error"},this.contentError||o("Could not load the pad content.")):null,t("button",{class:"button epnc-pad-doc__refresh",attrs:{type:"button",disabled:i},on:{click:()=>{this.loadContent()}}},i?o("Refreshing..."):o("Refresh")),...n]),this.renderContentBody(t)])])},renderContentBody(t){return this.contentLoaded&&this.contentState!=="ready"?this.renderContentText(t):this.contentState==="error"?t("div",{class:"epnc-pad-doc__text epnc-pad-doc__status"},[t("div",{},this.contentError||o("Could not load the pad content.")),t("button",{class:"button primary",attrs:{type:"button"},on:{click:()=>{this.loadContent()}}},o("Try again"))]):this.contentState!=="ready"?t("div",{class:"epnc-pad-doc__text epnc-pad-doc__status"},o("Loading pad content...")):this.renderContentText(t)},renderContentText(t){return this.content.isEmpty?t("div",{class:"epnc-pad-doc__text epnc-pad-doc__status"},o("This pad is still empty.")):t("div",{class:"epnc-pad-doc__text epnc-pad-doc__text--html",domProps:{innerHTML:this.content.html}})}},beforeDestroy(){this.resolveGeneration+=1,this._openAbort?.abort(),this._contentAbort?.abort(),this.teardownSync()},beforeUnmount(){this.resolveGeneration+=1,this._openAbort?.abort(),this._contentAbort?.abort(),this.teardownSync()},render(t){if(this.loadError){const e=[t("div",{class:"epnc-native-error-title"},o("Could not open pad")),t("div",{class:"epnc-native-error-message",attrs:{role:"alert"}},this.loadError)];return this.maybeStaleFileId&&e.push(t("div",{class:"epnc-native-error-message"},o("This file may have been moved or replaced since the list was loaded. Reload the page and open it again."))),this.canRetryOpen&&e.push(t("button",{class:"button primary epnc-native-error-action",attrs:{type:"button"},on:{click:()=>{this.resolveOpenUrl(!0)}}},o("Try again"))),this.canRecover&&(this.isCheckingOriginal?e.push(t("div",{class:"epnc-native-error-message"},o("Checking for the original pad..."))):this.originalPad?e.push(t("div",{class:"epnc-native-error-message"},o("This file looks like a copy of an existing .pad file in your account. Open the original to keep editing the linked pad, or create a new pad to fork the content stored in this file.")),t("a",{class:"button primary epnc-native-error-action",attrs:{href:this.originalPad.viewerUrl}},o("Open the original .pad file")),t("button",{class:"button epnc-native-error-action",attrs:{type:"button",disabled:this.isRecovering},on:{click:()=>{this.recoverFromSnapshot()}}},this.isRecovering?o("Creating new pad..."):o("Create new pad from this file"))):e.push(t("div",{class:"epnc-native-error-message"},o("We couldn't find a matching pad in this Nextcloud. You can create a new pad from the text stored in this file; from then on, opening this file will load the new pad.")),t("button",{class:"button primary epnc-native-error-action",attrs:{type:"button",disabled:this.isRecovering},on:{click:()=>{this.recoverFromSnapshot()}}},this.isRecovering?o("Creating new pad..."):o("Create new pad from this file")))),t("div",{class:"epnc-native-status epnc-native-status--error"},[t("div",{class:"epnc-native-error-card",ref:"errorCard"},e)])}return this.contentMode==="content"?this.renderContentView(t,this.externalOpenUrl===""?{}:{actions:[t("a",{class:"button epnc-pad-doc__link",attrs:{href:this.externalOpenUrl,target:"_blank",rel:"noopener noreferrer"}},o("Open original pad"))]}):this.isLoading||!this.iframeSrc?t("div",{class:"epnc-native-status"},"Loading pad..."):t("div",{class:"epnc-native-shell"},[t("iframe",{attrs:{srcdoc:et(this.iframeSrc),title:"Etherpad"},on:{load:()=>this.markLoaded(),error:()=>this.markLoaded()},class:"epnc-native-iframe"})])}};$({id:U,mimes:[k],component:nt});
+import{b as p,f,o as v,A as u,t as o,a as R,r as k,M as U,V as E}from"./fetch-helpers-BUxbvlK6.chunk.mjs";import{l as T,o as L,s as A,c as x,a as M,p as q,b as G,i as _,e as N,h as j,d as z}from"./pad-open-flow-By_FzSKk.chunk.mjs";import{p as H,i as m,a as $}from"./urls-Pchbg185.chunk.mjs";function V(t){if(W(t),window._oca_viewer_handlers??(window._oca_viewer_handlers=new Map),window._oca_viewer_handlers.has(t.id)){console.warn(`Handler with id ${t.id} is already registered.`);return}window._oca_viewer_handlers.set(t.id,t)}function W(t){const{id:e,mimes:n,mimesAliases:i,component:a}=t;if(!e||e.trim()===""||typeof e!="string")throw new Error("The handler does not have a valid id");if((!n||!Array.isArray(n))&&!i)throw new Error("Handler needs a valid mime array or mimesAliases");if(!a||typeof a!="object"&&typeof a!="function")throw new Error("The handler does not have a valid component")}const d=new Map,D=50,B=300*1e3,K=async(t,{bypassCache:e=!1}={})=>{const n="path:"+String(t),i=e?null:Q(n);if(i!==null)return i;const a=p("/apps/"+u+"/api/v1/pads/resolve")+"?file="+encodeURIComponent(t),c=I(a,{method:"GET",headers:{Accept:"application/json"}},"Pad resolve by path failed.").catch(s=>{throw d.delete(n),s});return X(n,c),c},Y=async t=>{const e=p("/apps/"+u+"/api/v1/pads/find-original/"+encodeURIComponent(String(t)));return I(e,{method:"GET",headers:{Accept:"application/json"}},"Lookup failed.")},J=async(t,e="")=>{const n=p("/apps/"+u+"/api/v1/pads/recover-from-snapshot/"+encodeURIComponent(String(t))),i=await f(n,{method:"POST",headers:{Accept:"application/json",requesttoken:v()}},{fallbackMessage:"Recovery failed.",timeoutMs:null});return typeof e=="string"&&e!==""&&d.delete("path:"+e),i},Q=t=>{const e=d.get(t);return e?Date.now()-e.createdAt>B?(d.delete(t),null):e.request:null},X=(t,e)=>{if(!d.has(t)&&d.size>=D){const n=d.keys().next().value;n!==void 0&&d.delete(n)}d.set(t,{createdAt:Date.now(),request:e})},I=async(t,e,n)=>f(t,e,{fallbackMessage:n}),C=t=>String(t||"").replace(/&/g,"&amp;").replace(/"/g,"&quot;").replace(/</g,"&lt;").replace(/>/g,"&gt;"),Z=["http:","https:"],tt=t=>{try{const e=new URL(String(t||""));return Z.includes(e.protocol)&&e.username===""&&e.password===""}catch{return!1}},et="default-src 'none'; frame-src http: https:; style-src 'unsafe-inline'",nt=t=>{const e=tt(t)?C(t):"";return'<!doctype html><html><head><meta charset="utf-8"><meta http-equiv="Content-Security-Policy" content="'+C(et)+'"><style>html,body,iframe{width:100%;height:100%;margin:0;border:0;overflow:hidden}iframe{display:block}</style></head><body><iframe src="'+e+'" title="Etherpad"></iframe></body></html>'},w=(t,e)=>k(t,o("Nextcloud did not answer. Check your connection and try again."),e),rt={name:"EtherpadNextcloudViewer",props:{filename:{type:String,required:!1,default:""},basename:{type:String,required:!1,default:""},source:{type:String,required:!1,default:""},fileid:{type:[String,Number],required:!1,default:null},fileId:{type:[String,Number],required:!1,default:null},fileInfo:{type:Object,required:!1,default:null}},data(){return{iframeSrc:"",isLoading:!0,loadError:"",canRecover:!1,canRetryOpen:!1,maybeStaleFileId:!1,recoveryFileId:null,recoveryPath:"",isRecovering:!1,isCheckingOriginal:!1,originalPad:null,externalOpenUrl:"",contentMode:"",contentUrl:"",contentState:"idle",contentError:"",content:{html:"",isEmpty:!1},contentLoaded:!1,contentGeneration:0,resolveGeneration:0}},computed:{sourcePath(){const t=typeof this.source=="string"?this.source.trim():"";return t&&$(t)||""},filePath(){const t=r=>!r||r==="/"?"/":r.startsWith("/")?r:"/"+r,e=(r,l)=>{if(!l)return"";if(l.startsWith("/"))return l;const y=t(r);return y==="/"?"/"+l:y+"/"+l};if(m(this.sourcePath))return this.sourcePath;const n=this.fileInfo&&typeof this.fileInfo=="object"?this.fileInfo:null,i=n&&typeof n.path=="string"?n.path:"";if(m(i))return i.startsWith("/")?i:"/"+i;const a=String(this.filename||this.basename||n&&(n.name||n.basename)||"");if(!a)return"";const c=n&&typeof n.dirname=="string"?n.dirname:"";if(c){const r=e(c,a);if(m(r))return r}const s=new URLSearchParams(window.location.search||"").get("dir")||"/",h=e(s,a);return m(h)?h:"/"+a},openKey(){return`${this.resolvedFileId===null?"":this.resolvedFileId}::${this.filePath}`},resolvedFileId(){const t=[this.fileid,this.fileId,this.fileInfo&&(this.fileInfo.fileid||this.fileInfo.fileId||this.fileInfo.id)];for(const e of t){const n=Number(e);if(Number.isFinite(n)&&n>0)return n}return null}},watch:{openKey:{immediate:!0,handler(){this.resolveOpenUrl()}}},methods:{async fetchOpenPayload(t,e={}){return z(await f(t,Object.assign({method:"GET"},e)))},async initializeMissingFrontmatter(){const t={Accept:"application/json",requesttoken:v()},e={timeoutMs:null,fallbackMessage:"Pad initialization failed."},n=s=>{s&&s.status==="migrated_from_legacy"&&console.info("Legacy Ownpad .pad migrated to managed format on first open.")};if(this.resolvedFileId!==null){const s=p("/apps/"+u+"/api/v1/pads/initialize-by-id/"+encodeURIComponent(String(this.resolvedFileId))),h=await f(s,{method:"POST",headers:t},e);return n(h),h}if(!this.filePath)throw new Error("Pad initialization failed: missing file path.");const i=new URLSearchParams;i.set("file",this.filePath);const a=p("/apps/"+u+"/api/v1/pads/initialize"),c=await f(a,{method:"POST",headers:Object.assign({},t,{"Content-Type":"application/x-www-form-urlencoded;charset=UTF-8"}),body:i.toString()},e);return n(c),c},async resolveRecoveryFileId(t){try{const e=await K(t,{bypassCache:!0}),n=Number(e&&e.file_id);return Number.isFinite(n)&&n>0?n:null}catch{return null}},markLoaded(){this.$emit("update:loaded",!0)},handFocusToErrorCard(){this.$nextTick(()=>{const t=this.$refs.errorCard;t instanceof HTMLElement&&j(t,t.querySelector(".epnc-native-error-message"))})},padSync(){return this._padSync||(this._padSync=N({requestToken:()=>v()})),this._padSync},teardownSync(){this._padSync&&(this._padSync.fireAndForget(!0,!0),this._padSync.stop(),this._padSync.removeLifecycleHandlers())},async resolveOpenUrl(t=!1){const e=++this.resolveGeneration,n=()=>e===this.resolveGeneration;this._openAbort?.abort();const i=typeof AbortController=="function"?new AbortController:null;if(this._openAbort=i,this.isLoading=!0,this.loadError="",this.canRecover=!1,this.canRetryOpen=!1,this.maybeStaleFileId=!1,this.recoveryFileId=null,this.recoveryPath="",this.isCheckingOriginal=!1,this.originalPad=null,this.iframeSrc="",this.externalOpenUrl="",this.contentMode="",this.contentUrl="",this.contentState="idle",this.contentError="",this.content={html:"",isEmpty:!1},this.contentLoaded=!1,this._contentAbort?.abort(),this._padSync&&(this._padSync.stop(),this._padSync.configure({syncUrl:""})),!this.filePath){if(!n())return;this.loadError="No .pad file selected.",this.isLoading=!1;return}const a=this.filePath,c=H(),s=(()=>{if(!c)return"";const r=new URL(p("/apps/"+u+"/api/v1/public/open/"+encodeURIComponent(c)),window.location.origin);return this.resolvedFileId!==null?r.searchParams.set("fileId",String(this.resolvedFileId)):r.searchParams.set("file",a),r.toString()})(),h={"Content-Type":"application/x-www-form-urlencoded;charset=UTF-8",requesttoken:v()};try{const r=await L({open:async()=>{const g=i?i.signal:void 0;if(s)return await this.fetchOpenPayload(s,{signal:g});if(this.resolvedFileId!==null){const S=new URLSearchParams;return S.set("fileId",String(this.resolvedFileId)),await this.fetchOpenPayload(p("/apps/"+u+"/api/v1/pads/open-by-id"),{method:"POST",headers:h,body:S.toString(),signal:g})}const b=new URLSearchParams;return b.set("file",a),await this.fetchOpenPayload(p("/apps/"+u+"/api/v1/pads/open"),{method:"POST",headers:h,body:b.toString(),signal:g})},initialize:()=>this.initializeMissingFrontmatter(),stillWanted:n});if(r===null||!n())return;const{syncUrl:l,intervalMs:y}=A(r);this.padSync().configure({syncUrl:l,intervalMs:y}),this.padSync().installLifecycleHandlers(),l&&this.padSync().start();const P=x(r),{isContentView:F,externalUrl:O}=M(r);if(F){this.externalOpenUrl=O,this.contentUrl=P,this.contentMode="content",this.markLoaded(),this.loadContent();return}this.iframeSrc=q(r),this.markLoaded()}catch(r){if(!n())return;this.loadError=w(r,"Could not load pad."),this.maybeStaleFileId=this.resolvedFileId!==null&&!!r&&r.status===404&&!r.code,this.canRetryOpen=G(r);let l=this.resolvedFileId;if(this.recoveryPath=a,l===null&&!s&&_(r)&&(l=await this.resolveRecoveryFileId(a),!n()))return;this.recoveryFileId=l,this.canRecover=_(r)&&l!==null&&!s,this.canRecover?this.fetchOriginalPadHint(n,t):t&&this.handFocusToErrorCard(),this.markLoaded()}finally{if(!n())return;this.isLoading=!1}},async fetchOriginalPadHint(t,e=!1){if(this.recoveryFileId!==null){this.isCheckingOriginal=!0;try{const n=await Y(this.recoveryFileId);if(!t())return;n&&n.found===!0&&typeof n.viewer_url=="string"&&n.viewer_url!==""&&(this.originalPad={viewerUrl:n.viewer_url,path:typeof n.path=="string"?n.path:""})}catch{}finally{t()&&(this.isCheckingOriginal=!1,e&&this.handFocusToErrorCard())}}},async recoverFromSnapshot(){if(!(!this.canRecover||this.isRecovering||this.recoveryFileId===null)){this.isRecovering=!0;try{await J(this.recoveryFileId,this.recoveryPath),this.loadError="",this.canRecover=!1,await this.resolveOpenUrl(!0)}catch(t){if(R(t)){await this.resolveOpenUrl(!0);return}this.isRecovering=!1,this.loadError=w(t,"Could not load pad."),this.handFocusToErrorCard()}finally{this.isRecovering=!1}}},async loadContent(){const t=this.resolveGeneration;this.contentGeneration+=1;const e=this.contentGeneration,n=()=>e===this.contentGeneration&&t===this.resolveGeneration;if(this.contentUrl===""){this.contentState="error",this.contentError=o("The server did not say where to load this pad from.");return}this._contentAbort?.abort();const i=typeof AbortController=="function"?new AbortController:null;this._contentAbort=i,this.contentState="loading",this.contentError="";try{const a=await T(this.contentUrl,{signal:i?.signal});if(!n())return;this.content=a,this.contentLoaded=!0,this.contentState="ready"}catch(a){if(!n()||a&&a.name==="AbortError")return;this.contentState="error",this.contentError=w(a,o("Could not load the pad content."))}},renderContentView(t,e){const n=Array.isArray(e.actions)?e.actions:[],i=this.contentState==="loading";return t("div",{class:"epnc-pad-doc"},[t("div",{class:"epnc-pad-doc__inner"},[t("div",{class:"epnc-pad-doc__toolbar"},[this.contentState==="error"&&this.contentLoaded?t("span",{class:"epnc-pad-doc__toolbar-error"},this.contentError||o("Could not load the pad content.")):null,t("button",{class:"button epnc-pad-doc__refresh",attrs:{type:"button",disabled:i},on:{click:()=>{this.loadContent()}}},i?o("Refreshing..."):o("Refresh")),...n]),this.renderContentBody(t)])])},renderContentBody(t){return this.contentLoaded&&this.contentState!=="ready"?this.renderContentText(t):this.contentState==="error"?t("div",{class:"epnc-pad-doc__text epnc-pad-doc__status"},[t("div",{},this.contentError||o("Could not load the pad content.")),t("button",{class:"button primary",attrs:{type:"button"},on:{click:()=>{this.loadContent()}}},o("Try again"))]):this.contentState!=="ready"?t("div",{class:"epnc-pad-doc__text epnc-pad-doc__status"},o("Loading pad content...")):this.renderContentText(t)},renderContentText(t){return this.content.isEmpty?t("div",{class:"epnc-pad-doc__text epnc-pad-doc__status"},o("This pad is still empty.")):t("div",{class:"epnc-pad-doc__text epnc-pad-doc__text--html",domProps:{innerHTML:this.content.html}})}},beforeDestroy(){this.resolveGeneration+=1,this._openAbort?.abort(),this._contentAbort?.abort(),this.teardownSync()},beforeUnmount(){this.resolveGeneration+=1,this._openAbort?.abort(),this._contentAbort?.abort(),this.teardownSync()},render(t){if(this.loadError){const e=[t("div",{class:"epnc-native-error-title"},o("Could not open pad")),t("div",{class:"epnc-native-error-message",attrs:{role:"alert"}},this.loadError)];return this.maybeStaleFileId&&e.push(t("div",{class:"epnc-native-error-message"},o("This file may have been moved or replaced since the list was loaded. Reload the page and open it again."))),this.canRetryOpen&&e.push(t("button",{class:"button primary epnc-native-error-action",attrs:{type:"button"},on:{click:()=>{this.resolveOpenUrl(!0)}}},o("Try again"))),this.canRecover&&(this.isCheckingOriginal?e.push(t("div",{class:"epnc-native-error-message"},o("Checking for the original pad..."))):this.originalPad?e.push(t("div",{class:"epnc-native-error-message"},o("This file looks like a copy of an existing .pad file in your account. Open the original to keep editing the linked pad, or create a new pad to fork the content stored in this file.")),t("a",{class:"button primary epnc-native-error-action",attrs:{href:this.originalPad.viewerUrl}},o("Open the original .pad file")),t("button",{class:"button epnc-native-error-action",attrs:{type:"button",disabled:this.isRecovering},on:{click:()=>{this.recoverFromSnapshot()}}},this.isRecovering?o("Creating new pad..."):o("Create new pad from this file"))):e.push(t("div",{class:"epnc-native-error-message"},o("We couldn't find a matching pad in this Nextcloud. You can create a new pad from the text stored in this file; from then on, opening this file will load the new pad.")),t("button",{class:"button primary epnc-native-error-action",attrs:{type:"button",disabled:this.isRecovering},on:{click:()=>{this.recoverFromSnapshot()}}},this.isRecovering?o("Creating new pad..."):o("Create new pad from this file")))),t("div",{class:"epnc-native-status epnc-native-status--error"},[t("div",{class:"epnc-native-error-card",ref:"errorCard"},e)])}return this.contentMode==="content"?this.renderContentView(t,this.externalOpenUrl===""?{}:{actions:[t("a",{class:"button epnc-pad-doc__link",attrs:{href:this.externalOpenUrl,target:"_blank",rel:"noopener noreferrer"}},o("Open original pad"))]}):this.isLoading||!this.iframeSrc?t("div",{class:"epnc-native-status"},"Loading pad..."):t("div",{class:"epnc-native-shell"},[t("iframe",{attrs:{srcdoc:nt(this.iframeSrc),title:"Etherpad"},on:{load:()=>this.markLoaded(),error:()=>this.markLoaded()},class:"epnc-native-iframe"})])}};V({id:E,mimes:[U],component:rt});
 //# sourceMappingURL=etherpad_nextcloud-viewer-init.mjs.map
diff --git a/js/etherpad_nextcloud-viewer-init.mjs.map b/js/etherpad_nextcloud-viewer-init.mjs.map
index 02d01b94..cb6ee868 100644
--- a/js/etherpad_nextcloud-viewer-init.mjs.map
+++ b/js/etherpad_nextcloud-viewer-init.mjs.map
@@ -1 +1 @@
-{"version":3,"file":"etherpad_nextcloud-viewer-init.mjs","sources":["../node_modules/@nextcloud/viewer/dist/index.js","../src/lib/api-client.js","../src/lib/pad-frame-srcdoc.js","../src/viewer-main.js","../src/viewer-init.js"],"sourcesContent":["/*!\n * SPDX-FileCopyrightText: 2025 Nextcloud GmbH and Nextcloud contributors\n * SPDX-License-Identifier: AGPL-3.0-or-later\n */\n/**\n * Register a new handler for the viewer.\n * This needs to be called before the viewer is initialized to ensure the handler is available.\n * So this should be called from an initialization script (`OCP\\Util::addInitScript`).\n *\n * @param handler - The handler to register\n * @throws Error if the handler is invalid\n */\nexport function registerHandler(handler) {\n    validateHandler(handler);\n    window._oca_viewer_handlers ?? (window._oca_viewer_handlers = new Map());\n    if (window._oca_viewer_handlers.has(handler.id)) {\n        console.warn(`Handler with id ${handler.id} is already registered.`);\n        return;\n    }\n    window._oca_viewer_handlers.set(handler.id, handler);\n}\n/**\n * Validate the handler object.\n *\n * @param handler - The handler to validate\n */\nfunction validateHandler(handler) {\n    const { id, mimes, mimesAliases, component } = handler;\n    // checking valid handler id\n    if (!id || id.trim() === '' || typeof id !== 'string') {\n        throw new Error('The handler does not have a valid id');\n    }\n    // Nothing available to process! Failure\n    if ((!mimes || !Array.isArray(mimes)) && !mimesAliases) {\n        throw new Error('Handler needs a valid mime array or mimesAliases');\n    }\n    // checking valid handler component data\n    if ((!component || (typeof component !== 'object' && typeof component !== 'function'))) {\n        throw new Error('The handler does not have a valid component');\n    }\n}\n","/**\n * SPDX-License-Identifier: AGPL-3.0-or-later\n * Copyright (c) 2026 Jacob Bühler\n */\n\n/** Client helpers for pad resolution and snapshot recovery. */\n\nimport { APP_ID } from './constants.js'\nimport { ocGenerateUrl, ocRequestToken } from './oc-compat.js'\nimport { fetchJsonWithTimeout } from './fetch-helpers.js'\n\nconst RESOLVE_CACHE = new Map()\nconst RESOLVE_CACHE_MAX_ENTRIES = 50\nconst RESOLVE_CACHE_TTL_MS = 5 * 60 * 1000\n\n/**\n * Resolve a path to its pad metadata.\n *\n * Bypass the cache before a write. An entry is up to five minutes old, and\n * in five minutes a file can be moved and another `.pad` created at the\n * same path: for a read that is stale, for recovery it would bind a pad to\n * the wrong file.\n */\nexport const apiResolvePadByPath = async (path, { bypassCache = false } = {}) => {\n\tconst cacheKey = 'path:' + String(path)\n\tconst cached = bypassCache ? null : getResolveCache(cacheKey)\n\tif (cached !== null) {\n\t\treturn cached\n\t}\n\tconst url = ocGenerateUrl('/apps/' + APP_ID + '/api/v1/pads/resolve') + '?file=' + encodeURIComponent(path)\n\tconst request = fetchJson(url, {\n\t\tmethod: 'GET',\n\t\theaders: { Accept: 'application/json' },\n\t}, 'Pad resolve by path failed.')\n\t\t.catch((error) => {\n\t\t\tRESOLVE_CACHE.delete(cacheKey)\n\t\t\tthrow error\n\t\t})\n\tsetResolveCache(cacheKey, request)\n\treturn request\n}\n\nexport const apiFindOriginalPad = async (fileId) => {\n\tconst endpoint = ocGenerateUrl('/apps/' + APP_ID + '/api/v1/pads/find-original/' + encodeURIComponent(String(fileId)))\n\treturn fetchJson(endpoint, {\n\t\tmethod: 'GET',\n\t\theaders: { Accept: 'application/json' },\n\t}, 'Lookup failed.')\n}\n\nexport const apiRecoverFromSnapshot = async (fileId, path = '') => {\n\tconst endpoint = ocGenerateUrl('/apps/' + APP_ID + '/api/v1/pads/recover-from-snapshot/' + encodeURIComponent(String(fileId)))\n\t// A client timeout would not stop the server-side provisioning work.\n\tconst result = await fetchJsonWithTimeout(endpoint, {\n\t\tmethod: 'POST',\n\t\theaders: {\n\t\t\tAccept: 'application/json',\n\t\t\trequesttoken: ocRequestToken(),\n\t\t},\n\t}, { fallbackMessage: 'Recovery failed.', timeoutMs: null })\n\t// Only this path: flushing every entry would throw away answers for\n\t// unrelated files the session has already looked up.\n\tif (typeof path === 'string' && path !== '') {\n\t\tRESOLVE_CACHE.delete('path:' + path)\n\t}\n\treturn result\n}\nconst getResolveCache = (cacheKey) => {\n\tconst cached = RESOLVE_CACHE.get(cacheKey)\n\tif (!cached) {\n\t\treturn null\n\t}\n\tif ((Date.now() - cached.createdAt) > RESOLVE_CACHE_TTL_MS) {\n\t\tRESOLVE_CACHE.delete(cacheKey)\n\t\treturn null\n\t}\n\treturn cached.request\n}\n\nconst setResolveCache = (cacheKey, request) => {\n\tif (!RESOLVE_CACHE.has(cacheKey) && RESOLVE_CACHE.size >= RESOLVE_CACHE_MAX_ENTRIES) {\n\t\tconst oldestKey = RESOLVE_CACHE.keys().next().value\n\t\tif (oldestKey !== undefined) {\n\t\t\tRESOLVE_CACHE.delete(oldestKey)\n\t\t}\n\t}\n\tRESOLVE_CACHE.set(cacheKey, {\n\t\tcreatedAt: Date.now(),\n\t\trequest,\n\t})\n}\n\nconst fetchJson = async (url, options, fallbackMessage) =>\n\tfetchJsonWithTimeout(url, options, { fallbackMessage })\n","/**\n * SPDX-License-Identifier: AGPL-3.0-or-later\n * Copyright (c) 2026 Jacob Bühler\n */\n\nconst escapeAttribute = (value) => String(value || '')\n\t.replace(/&/g, '&amp;')\n\t.replace(/\"/g, '&quot;')\n\t.replace(/</g, '&lt;')\n\t.replace(/>/g, '&gt;')\n\nconst ALLOWED_PAD_URL_SCHEMES = ['http:', 'https:']\n\nconst isSafePadUrl = (url) => {\n\ttry {\n\t\tconst parsed = new URL(String(url || ''))\n\t\treturn ALLOWED_PAD_URL_SCHEMES.includes(parsed.protocol)\n\t\t\t&& parsed.username === ''\n\t\t\t&& parsed.password === ''\n\t} catch {\n\t\treturn false\n\t}\n}\n\nconst SRC_DOC_CSP = \"default-src 'none'; frame-src http: https:; style-src 'unsafe-inline'\"\n\nexport const buildPadFrameSrcdoc = (url) => {\n\tconst safeUrl = isSafePadUrl(url) ? escapeAttribute(url) : ''\n\treturn '<!doctype html><html><head><meta charset=\"utf-8\">'\n\t+ '<meta http-equiv=\"Content-Security-Policy\" content=\"' + escapeAttribute(SRC_DOC_CSP) + '\">'\n\t+ '<style>html,body,iframe{width:100%;height:100%;margin:0;border:0;overflow:hidden}iframe{display:block}</style>'\n\t+ '</head><body><iframe src=\"' + safeUrl + '\" title=\"Etherpad\"></iframe></body></html>'\n}\n","/**\n * SPDX-License-Identifier: AGPL-3.0-or-later\n * Copyright (c) 2026 Jacob Bühler\n */\n\n/** Nextcloud Viewer component for editable pads and read-only pad content. */\n\nimport { APP_ID } from './lib/constants.js'\nimport { apiFindOriginalPad, apiRecoverFromSnapshot, apiResolvePadByPath } from './lib/api-client.js'\nimport { fetchJsonWithTimeout, requestErrorMessage } from './lib/fetch-helpers.js'\nimport { handFocusTo } from './lib/hand-focus.js'\nimport { ocGenerateUrl, ocRequestToken, translate } from './lib/oc-compat.js'\nimport { createPadSync } from './lib/pad-sync.js'\nimport { loadPadContent } from './lib/pad-content.js'\nimport { assertOpenPayload, contentUrlFrom, contentViewFrom, isMissingBindingError, isRetryableOpenError, openWithFrontmatterRecovery, padUrlFrom, syncSettingsFrom } from './lib/pad-open-flow.js'\nimport { buildPadFrameSrcdoc } from './lib/pad-frame-srcdoc.js'\nimport { isPadName, parsePadPathFromDavHref, parsePublicShareTokenFromLocation } from './lib/urls.js'\n\n// When nothing came back: our own sentence, not the browser's English.\nconst messageOf = (error, fallback) => requestErrorMessage(error, translate('Nextcloud did not answer. Check your connection and try again.'), fallback)\n\nconst component = {\n\tname: 'EtherpadNextcloudViewer',\n\tprops: {\n\t\tfilename: { type: String, required: false, default: '' },\n\t\tbasename: { type: String, required: false, default: '' },\n\t\tsource: { type: String, required: false, default: '' },\n\t\tfileid: { type: [String, Number], required: false, default: null },\n\t\tfileId: { type: [String, Number], required: false, default: null },\n\t\tfileInfo: { type: Object, required: false, default: null },\n\t},\n\tdata() {\n\t\treturn {\n\t\t\tiframeSrc: '',\n\t\t\tisLoading: true,\n\t\t\tloadError: '',\n\t\t\tcanRecover: false,\n\t\t\tcanRetryOpen: false,\n\t\t\tmaybeStaleFileId: false,\n\t\t\t// Recovery may resolve this from the path when Viewer supplies no id.\n\t\t\trecoveryFileId: null,\n\t\t\t// Kept with the id so recovery invalidates the matching cache entry.\n\t\t\trecoveryPath: '',\n\t\t\tisRecovering: false,\n\t\t\tisCheckingOriginal: false,\n\t\t\toriginalPad: null,\n\t\t\texternalOpenUrl: '',\n\t\t\tcontentMode: '',\n\t\t\tcontentUrl: '',\n\t\t\tcontentState: 'idle',\n\t\t\tcontentError: '',\n\t\t\tcontent: { html: '', isEmpty: false },\n\t\t\t// A refresh keeps previously loaded content visible.\n\t\t\tcontentLoaded: false,\n\t\t\t// Refreshes supersede each other without superseding the open.\n\t\t\tcontentGeneration: 0,\n\t\t\tresolveGeneration: 0,\n\t\t}\n\t},\n\tcomputed: {\n\t\tsourcePath() {\n\t\t\t// Whitespace inside the DAV URL is encoded; only surrounding noise is trimmed.\n\t\t\tconst value = typeof this.source === 'string' ? this.source.trim() : ''\n\t\t\tif (!value) return ''\n\t\t\treturn parsePadPathFromDavHref(value) || ''\n\t\t},\n\t\tfilePath() {\n\t\t\t// Whitespace is part of the name, not noise: `Notes .pad` and\n\t\t\t// `Notes.pad` are two files, and trimming here opened the wrong one.\n\t\t\tconst normalizeDir = (dir) => {\n\t\t\t\tif (!dir || dir === '/') return '/'\n\t\t\t\treturn dir.startsWith('/') ? dir : ('/' + dir)\n\t\t\t}\n\t\t\tconst joinPath = (dir, name) => {\n\t\t\t\tif (!name) return ''\n\t\t\t\tif (name.startsWith('/')) return name\n\t\t\t\tconst normalizedDir = normalizeDir(dir)\n\t\t\t\treturn normalizedDir === '/' ? '/' + name : normalizedDir + '/' + name\n\t\t\t}\n\t\t\tif (isPadName(this.sourcePath)) return this.sourcePath\n\n\t\t\tconst info = this.fileInfo && typeof this.fileInfo === 'object' ? this.fileInfo : null\n\t\t\tconst infoPath = info && typeof info.path === 'string' ? info.path : ''\n\t\t\tif (isPadName(infoPath)) return infoPath.startsWith('/') ? infoPath : ('/' + infoPath)\n\n\t\t\tconst baseName = String(this.filename || this.basename || (info && (info.name || info.basename)) || '')\n\t\t\tif (!baseName) return ''\n\n\t\t\tconst infoDir = info && typeof info.dirname === 'string' ? info.dirname : ''\n\t\t\tif (infoDir) {\n\t\t\t\tconst combined = joinPath(infoDir, baseName)\n\t\t\t\tif (isPadName(combined)) return combined\n\t\t\t}\n\n\t\t\tconst params = new URLSearchParams(window.location.search || '')\n\t\t\tconst urlDir = params.get('dir') || '/'\n\t\t\tconst fromDir = joinPath(urlDir, baseName)\n\t\t\tif (isPadName(fromDir)) return fromDir\n\t\t\treturn '/' + baseName\n\t\t},\n\t\topenKey() {\n\t\t\treturn `${this.resolvedFileId === null ? '' : this.resolvedFileId}::${this.filePath}`\n\t\t},\n\t\tresolvedFileId() {\n\t\t\tconst candidates = [this.fileid, this.fileId, this.fileInfo && (this.fileInfo.fileid || this.fileInfo.fileId || this.fileInfo.id)]\n\t\t\tfor (const candidate of candidates) {\n\t\t\t\tconst numeric = Number(candidate)\n\t\t\t\tif (Number.isFinite(numeric) && numeric > 0) return numeric\n\t\t\t}\n\t\t\t// Route ids can outlive the item shown after Viewer navigation.\n\t\t\treturn null\n\t\t},\n\t},\n\twatch: {\n\t\t// A file swap changes path and id together; open it only once.\n\t\topenKey: { immediate: true, handler() { void this.resolveOpenUrl() } },\n\t},\n\tmethods: {\n\t\tasync fetchOpenPayload(url, init = {}) {\n\t\t\treturn assertOpenPayload(await fetchJsonWithTimeout(url, Object.assign({ method: 'GET' }, init)))\n\t\t},\n\t\tasync initializeMissingFrontmatter() {\n\t\t\tconst headers = {\n\t\t\t\tAccept: 'application/json',\n\t\t\t\trequesttoken: ocRequestToken(),\n\t\t\t}\n\n\t\t\t// A client timeout would not stop the server-side provisioning work.\n\t\t\tconst initOptions = { timeoutMs: null, fallbackMessage: 'Pad initialization failed.' }\n\n\t\t\tconst announceMigratedStatus = (data) => {\n\t\t\t\tif (data && data.status === 'migrated_from_legacy') {\n\t\t\t\t\tconsole.info('Legacy Ownpad .pad migrated to managed format on first open.')\n\t\t\t\t}\n\t\t\t}\n\n\t\t\tif (this.resolvedFileId !== null) {\n\t\t\t\tconst url = ocGenerateUrl('/apps/' + APP_ID + '/api/v1/pads/initialize-by-id/' + encodeURIComponent(String(this.resolvedFileId)))\n\t\t\t\tconst data = await fetchJsonWithTimeout(url, { method: 'POST', headers }, initOptions)\n\t\t\t\tannounceMigratedStatus(data)\n\t\t\t\treturn data\n\t\t\t}\n\n\t\t\tif (!this.filePath) {\n\t\t\t\tthrow new Error('Pad initialization failed: missing file path.')\n\t\t\t}\n\n\t\t\tconst body = new URLSearchParams()\n\t\t\tbody.set('file', this.filePath)\n\t\t\tconst url = ocGenerateUrl('/apps/' + APP_ID + '/api/v1/pads/initialize')\n\t\t\tconst data = await fetchJsonWithTimeout(url, {\n\t\t\t\tmethod: 'POST',\n\t\t\t\theaders: Object.assign({}, headers, {\n\t\t\t\t\t'Content-Type': 'application/x-www-form-urlencoded;charset=UTF-8',\n\t\t\t\t}),\n\t\t\t\tbody: body.toString(),\n\t\t\t}, initOptions)\n\t\t\tannounceMigratedStatus(data)\n\t\t\treturn data\n\t\t},\n\t\t/** Resolve a fresh id for recovery without changing the opened file. */\n\t\tasync resolveRecoveryFileId(openPath) {\n\t\t\ttry {\n\t\t\t\tconst resolved = await apiResolvePadByPath(openPath, { bypassCache: true })\n\t\t\t\tconst id = Number(resolved && resolved.file_id)\n\t\t\t\treturn Number.isFinite(id) && id > 0 ? id : null\n\t\t\t} catch {\n\t\t\t\treturn null\n\t\t\t}\n\t\t},\n\t\tmarkLoaded() {\n\t\t\tthis.$emit('update:loaded', true)\n\t\t},\n\t\t/**\n\t\t * See handFocusTo(). On the next tick, once the card is drawn: call\n\t\t * it after setting what the card shows.\n\t\t */\n\t\thandFocusToErrorCard() {\n\t\t\tthis.$nextTick(() => {\n\t\t\t\tconst card = this.$refs.errorCard\n\t\t\t\tif (card instanceof HTMLElement) {\n\t\t\t\t\thandFocusTo(card, card.querySelector('.epnc-native-error-message'))\n\t\t\t\t}\n\t\t\t})\n\t\t},\n\t\t// Keep the sync controller non-reactive and available to the immediate watcher.\n\t\tpadSync() {\n\t\t\tif (!this._padSync) {\n\t\t\t\tthis._padSync = createPadSync({ requestToken: () => ocRequestToken() })\n\t\t\t}\n\t\t\treturn this._padSync\n\t\t},\n\t\t// Do not create a controller solely to tear it down.\n\t\tteardownSync() {\n\t\t\tif (!this._padSync) {\n\t\t\t\treturn\n\t\t\t}\n\t\t\tthis._padSync.fireAndForget(true, true)\n\t\t\tthis._padSync.stop()\n\t\t\tthis._padSync.removeLifecycleHandlers()\n\t\t},\n\t\t/** $afterClick: see handFocusToErrorCard(). */\n\t\tasync resolveOpenUrl(afterClick = false) {\n\t\t\tconst generation = ++this.resolveGeneration\n\t\t\tconst isCurrent = () => generation === this.resolveGeneration\n\t\t\t// Discarding a result is insufficient: a completed request may mint a session.\n\t\t\tthis._openAbort?.abort()\n\t\t\tconst abort = typeof AbortController === 'function' ? new AbortController() : null\n\t\t\tthis._openAbort = abort\n\n\t\t\tthis.isLoading = true\n\t\t\tthis.loadError = ''\n\t\t\tthis.canRecover = false\n\t\t\tthis.canRetryOpen = false\n\t\t\tthis.maybeStaleFileId = false\n\t\t\tthis.recoveryFileId = null\n\t\t\tthis.recoveryPath = ''\n\t\t\tthis.isCheckingOriginal = false\n\t\t\tthis.originalPad = null\n\t\t\tthis.iframeSrc = ''\n\t\t\tthis.externalOpenUrl = ''\n\t\t\tthis.contentMode = ''\n\t\t\tthis.contentUrl = ''\n\t\t\tthis.contentState = 'idle'\n\t\t\tthis.contentError = ''\n\t\t\tthis.content = { html: '', isEmpty: false }\n\t\t\tthis.contentLoaded = false\n\t\t\tthis._contentAbort?.abort()\n\t\t\t// Do not construct a sync controller while resetting viewer state.\n\t\t\tif (this._padSync) {\n\t\t\t\tthis._padSync.stop()\n\t\t\t\tthis._padSync.configure({ syncUrl: '' })\n\t\t\t}\n\n\t\t\tif (!this.filePath) {\n\t\t\t\tif (!isCurrent()) return\n\t\t\t\tthis.loadError = 'No .pad file selected.'\n\t\t\t\tthis.isLoading = false\n\t\t\t\treturn\n\t\t\t}\n\n\t\t\t// Viewer props may change before the watcher starts the next open.\n\t\t\tconst openPath = this.filePath\n\t\t\tconst publicToken = parsePublicShareTokenFromLocation()\n\t\t\tconst byPublicUrl = (() => {\n\t\t\t\tif (!publicToken) return ''\n\t\t\t\tconst url = new URL(ocGenerateUrl('/apps/' + APP_ID + '/api/v1/public/open/' + encodeURIComponent(publicToken)), window.location.origin)\n\t\t\t\t// The public endpoint rejects conflicting id and path locators.\n\t\t\t\tif (this.resolvedFileId !== null) {\n\t\t\t\t\turl.searchParams.set('fileId', String(this.resolvedFileId))\n\t\t\t\t} else {\n\t\t\t\t\turl.searchParams.set('file', openPath)\n\t\t\t\t}\n\t\t\t\treturn url.toString()\n\t\t\t})()\n\t\t\tconst openPostHeaders = {\n\t\t\t\t'Content-Type': 'application/x-www-form-urlencoded;charset=UTF-8',\n\t\t\t\trequesttoken: ocRequestToken(),\n\t\t\t}\n\n\t\t\ttry {\n\t\t\t\tconst fetchOpenData = async () => {\n\t\t\t\t\t// Never retry a refused id by path: it could identify a different file.\n\t\t\t\t\tconst signal = abort ? abort.signal : undefined\n\t\t\t\t\tif (byPublicUrl) {\n\t\t\t\t\t\treturn await this.fetchOpenPayload(byPublicUrl, { signal })\n\t\t\t\t\t}\n\t\t\t\t\t// One way in, chosen once. An open by id that retries by\n\t\t\t\t\t// path is how a refused id ended up opening whatever the\n\t\t\t\t\t// path pointed at.\n\t\t\t\t\tif (this.resolvedFileId !== null) {\n\t\t\t\t\t\tconst byIdBody = new URLSearchParams()\n\t\t\t\t\t\tbyIdBody.set('fileId', String(this.resolvedFileId))\n\t\t\t\t\t\treturn await this.fetchOpenPayload(\n\t\t\t\t\t\t\tocGenerateUrl('/apps/' + APP_ID + '/api/v1/pads/open-by-id'),\n\t\t\t\t\t\t\t{ method: 'POST', headers: openPostHeaders, body: byIdBody.toString(), signal },\n\t\t\t\t\t\t)\n\t\t\t\t\t}\n\t\t\t\t\tconst byPathBody = new URLSearchParams()\n\t\t\t\t\tbyPathBody.set('file', openPath)\n\t\t\t\t\treturn await this.fetchOpenPayload(\n\t\t\t\t\t\tocGenerateUrl('/apps/' + APP_ID + '/api/v1/pads/open'),\n\t\t\t\t\t\t{ method: 'POST', headers: openPostHeaders, body: byPathBody.toString(), signal },\n\t\t\t\t\t)\n\t\t\t\t}\n\n\t\t\t\tconst data = await openWithFrontmatterRecovery({\n\t\t\t\t\topen: fetchOpenData,\n\t\t\t\t\tinitialize: () => this.initializeMissingFrontmatter(),\n\t\t\t\t\tstillWanted: isCurrent,\n\t\t\t\t})\n\t\t\t\tif (data === null || !isCurrent()) return\n\n\t\t\t\tconst { syncUrl, intervalMs } = syncSettingsFrom(data)\n\n\t\t\t\tthis.padSync().configure({ syncUrl, intervalMs })\n\t\t\t\tthis.padSync().installLifecycleHandlers()\n\t\t\t\tif (syncUrl) {\n\t\t\t\t\tthis.padSync().start()\n\t\t\t\t}\n\n\t\t\t\tconst contentUrl = contentUrlFrom(data)\n\n\t\t\t\tconst { isContentView, externalUrl } = contentViewFrom(data)\n\t\t\t\tif (isContentView) {\n\t\t\t\t\tthis.externalOpenUrl = externalUrl\n\t\t\t\t\tthis.contentUrl = contentUrl\n\t\t\t\t\tthis.contentMode = 'content'\n\t\t\t\t\tthis.markLoaded()\n\t\t\t\t\t// Draw the content view while its body loads.\n\t\t\t\t\tvoid this.loadContent()\n\t\t\t\t\treturn\n\t\t\t\t}\n\n\t\t\t\tthis.iframeSrc = padUrlFrom(data)\n\t\t\t\tthis.markLoaded()\n\t\t\t} catch (error) {\n\t\t\t\tif (!isCurrent()) return\n\t\t\t\tthis.loadError = messageOf(error, 'Could not load pad.')\n\t\t\t\t// The server intentionally does not disclose why this id is unavailable.\n\t\t\t\tthis.maybeStaleFileId = this.resolvedFileId !== null\n\t\t\t\t\t&& Boolean(error) && error.status === 404 && !error.code\n\t\t\t\tthis.canRetryOpen = isRetryableOpenError(error)\n\t\t\t\t// Recovery may resolve only the same path that failed to open.\n\t\t\t\tlet recoveryFileId = this.resolvedFileId\n\t\t\t\tthis.recoveryPath = openPath\n\t\t\t\tif (recoveryFileId === null && !byPublicUrl && isMissingBindingError(error)) {\n\t\t\t\t\trecoveryFileId = await this.resolveRecoveryFileId(openPath)\n\t\t\t\t\t// A late lookup must not attach recovery to a newer Viewer item.\n\t\t\t\t\tif (!isCurrent()) return\n\t\t\t\t}\n\t\t\t\tthis.recoveryFileId = recoveryFileId\n\t\t\t\tthis.canRecover = isMissingBindingError(error)\n\t\t\t\t\t&& recoveryFileId !== null\n\t\t\t\t\t&& !byPublicUrl\n\t\t\t\tif (this.canRecover) {\n\t\t\t\t\tthis.fetchOriginalPadHint(isCurrent, afterClick)\n\t\t\t\t} else if (afterClick) {\n\t\t\t\t\tthis.handFocusToErrorCard()\n\t\t\t\t}\n\t\t\t\tthis.markLoaded()\n\t\t\t} finally {\n\t\t\t\tif (!isCurrent()) return\n\t\t\t\tthis.isLoading = false\n\t\t\t}\n\t\t},\n\t\t/** $afterClick: the focus waits for the card's final actions. */\n\t\tasync fetchOriginalPadHint(isCurrent, afterClick = false) {\n\t\t\tif (this.recoveryFileId === null) {\n\t\t\t\treturn\n\t\t\t}\n\t\t\tthis.isCheckingOriginal = true\n\t\t\ttry {\n\t\t\t\tconst hint = await apiFindOriginalPad(this.recoveryFileId)\n\t\t\t\tif (!isCurrent()) return\n\t\t\t\tif (hint && hint.found === true && typeof hint.viewer_url === 'string' && hint.viewer_url !== '') {\n\t\t\t\t\tthis.originalPad = {\n\t\t\t\t\t\tviewerUrl: hint.viewer_url,\n\t\t\t\t\t\tpath: typeof hint.path === 'string' ? hint.path : '',\n\t\t\t\t\t}\n\t\t\t\t}\n\t\t\t} catch {\n\t\t\t\t// Recovery remains available without an original-file hint.\n\t\t\t} finally {\n\t\t\t\tif (isCurrent()) {\n\t\t\t\t\tthis.isCheckingOriginal = false\n\t\t\t\t\tif (afterClick) {\n\t\t\t\t\t\tthis.handFocusToErrorCard()\n\t\t\t\t\t}\n\t\t\t\t}\n\t\t\t}\n\t\t},\n\t\tasync recoverFromSnapshot() {\n\t\t\tif (!this.canRecover || this.isRecovering || this.recoveryFileId === null) {\n\t\t\t\treturn\n\t\t\t}\n\t\t\tthis.isRecovering = true\n\t\t\ttry {\n\t\t\t\tawait apiRecoverFromSnapshot(this.recoveryFileId, this.recoveryPath)\n\t\t\t\tthis.loadError = ''\n\t\t\t\tthis.canRecover = false\n\t\t\t\tawait this.resolveOpenUrl(true)\n\t\t\t} catch (error) {\n\t\t\t\t// No answer: the pad may be set up by now, and another\n\t\t\t\t// recovery would meet it. Opening tells, and is safe to repeat.\n\t\t\t\tif (error && error.unanswered === true) {\n\t\t\t\t\tawait this.resolveOpenUrl(true)\n\t\t\t\t\treturn\n\t\t\t\t}\n\t\t\t\t// Enabled again before the card is drawn, so the focus lands.\n\t\t\t\tthis.isRecovering = false\n\t\t\t\tthis.loadError = messageOf(error, 'Could not load pad.')\n\t\t\t\t// The clicked button lost the focus while it was disabled.\n\t\t\t\tthis.handFocusToErrorCard()\n\t\t\t} finally {\n\t\t\t\tthis.isRecovering = false\n\t\t\t}\n\t\t},\n\t\t/** Refresh content through an endpoint that re-checks access. */\n\t\tasync loadContent() {\n\t\t\tconst openGeneration = this.resolveGeneration\n\t\t\tthis.contentGeneration += 1\n\t\t\tconst generation = this.contentGeneration\n\t\t\tconst isCurrent = () => generation === this.contentGeneration\n\t\t\t\t&& openGeneration === this.resolveGeneration\n\n\t\t\tif (this.contentUrl === '') {\n\t\t\t\tthis.contentState = 'error'\n\t\t\t\tthis.contentError = translate('The server did not say where to load this pad from.')\n\t\t\t\treturn\n\t\t\t}\n\n\t\t\tthis._contentAbort?.abort()\n\t\t\t// Abort superseded content refreshes.\n\t\t\tconst abort = typeof AbortController === 'function' ? new AbortController() : null\n\t\t\tthis._contentAbort = abort\n\t\t\tthis.contentState = 'loading'\n\t\t\tthis.contentError = ''\n\n\t\t\ttry {\n\t\t\t\tconst content = await loadPadContent(this.contentUrl, { signal: abort?.signal })\n\t\t\t\tif (!isCurrent()) return\n\t\t\t\tthis.content = content\n\t\t\t\tthis.contentLoaded = true\n\t\t\t\tthis.contentState = 'ready'\n\t\t\t} catch (error) {\n\t\t\t\tif (!isCurrent() || (error && error.name === 'AbortError')) return\n\t\t\t\tthis.contentState = 'error'\n\t\t\t\tthis.contentError = messageOf(error, translate('Could not load the pad content.'))\n\t\t\t}\n\t\t},\n\t\trenderContentView(createElement, options) {\n\t\t\tconst extraActions = Array.isArray(options.actions) ? options.actions : []\n\t\t\tconst isBusy = this.contentState === 'loading'\n\n\t\t\treturn createElement('div', { class: 'epnc-pad-doc' }, [\n\t\t\t\tcreateElement('div', { class: 'epnc-pad-doc__inner' }, [\n\t\t\t\t\tcreateElement('div', { class: 'epnc-pad-doc__toolbar' }, [\n\t\t\t\t\t\t(this.contentState === 'error' && this.contentLoaded)\n\t\t\t\t\t\t\t? createElement('span', { class: 'epnc-pad-doc__toolbar-error' },\n\t\t\t\t\t\t\t\tthis.contentError || translate('Could not load the pad content.'))\n\t\t\t\t\t\t\t: null,\n\t\t\t\t\t\tcreateElement('button', {\n\t\t\t\t\t\t\tclass: 'button epnc-pad-doc__refresh',\n\t\t\t\t\t\t\tattrs: { type: 'button', disabled: isBusy },\n\t\t\t\t\t\t\ton: { click: () => { void this.loadContent() } },\n\t\t\t\t\t\t}, isBusy ? translate('Refreshing...') : translate('Refresh')),\n\t\t\t\t\t\t...extraActions,\n\t\t\t\t\t]),\n\t\t\t\t\tthis.renderContentBody(createElement),\n\t\t\t\t]),\n\t\t\t])\n\t\t},\n\t\trenderContentBody(createElement) {\n\t\t\tif (this.contentLoaded && this.contentState !== 'ready') {\n\t\t\t\treturn this.renderContentText(createElement)\n\t\t\t}\n\t\t\tif (this.contentState === 'error') {\n\t\t\t\treturn createElement('div', { class: 'epnc-pad-doc__text epnc-pad-doc__status' }, [\n\t\t\t\t\tcreateElement('div', {},\n\t\t\t\t\t\tthis.contentError || translate('Could not load the pad content.')),\n\t\t\t\t\tcreateElement('button', {\n\t\t\t\t\t\tclass: 'button primary',\n\t\t\t\t\t\tattrs: { type: 'button' },\n\t\t\t\t\t\ton: { click: () => { void this.loadContent() } },\n\t\t\t\t\t}, translate('Try again')),\n\t\t\t\t])\n\t\t\t}\n\t\t\tif (this.contentState !== 'ready') {\n\t\t\t\treturn createElement('div', { class: 'epnc-pad-doc__text epnc-pad-doc__status' }, translate('Loading pad content...'))\n\t\t\t}\n\t\t\treturn this.renderContentText(createElement)\n\t\t},\n\t\trenderContentText(createElement) {\n\t\t\tif (this.content.isEmpty) {\n\t\t\t\treturn createElement('div', { class: 'epnc-pad-doc__text epnc-pad-doc__status' }, translate('This pad is still empty.'))\n\t\t\t}\n\t\t\treturn createElement('div', {\n\t\t\t\tclass: 'epnc-pad-doc__text epnc-pad-doc__text--html',\n\t\t\t\tdomProps: { innerHTML: this.content.html },\n\t\t\t})\n\t\t},\n\t},\n\tbeforeDestroy() {\n\t\tthis.resolveGeneration += 1\n\t\t// Abort work that could otherwise finish after teardown.\n\t\tthis._openAbort?.abort()\n\t\tthis._contentAbort?.abort()\n\t\tthis.teardownSync()\n\t},\n\tbeforeUnmount() {\n\t\tthis.resolveGeneration += 1\n\t\tthis._openAbort?.abort()\n\t\tthis._contentAbort?.abort()\n\t\tthis.teardownSync()\n\t},\n\trender(createElement) {\n\t\tif (this.loadError) {\n\t\t\tconst cardChildren = [\n\t\t\t\tcreateElement('div', { class: 'epnc-native-error-title' }, translate('Could not open pad')),\n\t\t\t\t// Read out when it appears, not only when someone looks.\n\t\t\t\tcreateElement('div', { class: 'epnc-native-error-message', attrs: { role: 'alert' } }, this.loadError),\n\t\t\t]\n\t\t\tif (this.maybeStaleFileId) {\n\t\t\t\tcardChildren.push(\n\t\t\t\t\tcreateElement('div', { class: 'epnc-native-error-message' },\n\t\t\t\t\t\ttranslate('This file may have been moved or replaced since the list was loaded. Reload the page and open it again.')),\n\t\t\t\t)\n\t\t\t}\n\t\t\tif (this.canRetryOpen) {\n\t\t\t\tcardChildren.push(\n\t\t\t\t\tcreateElement('button', {\n\t\t\t\t\t\tclass: 'button primary epnc-native-error-action',\n\t\t\t\t\t\tattrs: { type: 'button' },\n\t\t\t\t\t\ton: { click: () => { void this.resolveOpenUrl(true) } },\n\t\t\t\t\t}, translate('Try again')),\n\t\t\t\t)\n\t\t\t}\n\t\t\tif (this.canRecover) {\n\t\t\t\tif (this.isCheckingOriginal) {\n\t\t\t\t\t// Wait before choosing the primary recovery action.\n\t\t\t\t\tcardChildren.push(\n\t\t\t\t\t\tcreateElement('div', { class: 'epnc-native-error-message' },\n\t\t\t\t\t\t\ttranslate('Checking for the original pad...')),\n\t\t\t\t\t)\n\t\t\t\t} else if (this.originalPad) {\n\t\t\t\t\tcardChildren.push(\n\t\t\t\t\t\tcreateElement('div', { class: 'epnc-native-error-message' },\n\t\t\t\t\t\t\ttranslate('This file looks like a copy of an existing .pad file in your account. Open the original to keep editing the linked pad, or create a new pad to fork the content stored in this file.')),\n\t\t\t\t\t\tcreateElement('a', {\n\t\t\t\t\t\t\tclass: 'button primary epnc-native-error-action',\n\t\t\t\t\t\t\tattrs: { href: this.originalPad.viewerUrl },\n\t\t\t\t\t\t}, translate('Open the original .pad file')),\n\t\t\t\t\t\tcreateElement('button', {\n\t\t\t\t\t\t\tclass: 'button epnc-native-error-action',\n\t\t\t\t\t\t\tattrs: { type: 'button', disabled: this.isRecovering },\n\t\t\t\t\t\t\ton: { click: () => { void this.recoverFromSnapshot() } },\n\t\t\t\t\t\t}, this.isRecovering ? translate('Creating new pad...') : translate('Create new pad from this file')),\n\t\t\t\t\t)\n\t\t\t\t} else {\n\t\t\t\t\tcardChildren.push(\n\t\t\t\t\t\tcreateElement('div', { class: 'epnc-native-error-message' },\n\t\t\t\t\t\t\ttranslate(\"We couldn't find a matching pad in this Nextcloud. You can create a new pad from the text stored in this file; from then on, opening this file will load the new pad.\")),\n\t\t\t\t\t\tcreateElement('button', {\n\t\t\t\t\t\t\tclass: 'button primary epnc-native-error-action',\n\t\t\t\t\t\t\tattrs: { type: 'button', disabled: this.isRecovering },\n\t\t\t\t\t\t\ton: { click: () => { void this.recoverFromSnapshot() } },\n\t\t\t\t\t\t}, this.isRecovering ? translate('Creating new pad...') : translate('Create new pad from this file')),\n\t\t\t\t\t)\n\t\t\t\t}\n\t\t\t}\n\t\t\treturn createElement('div', { class: 'epnc-native-status epnc-native-status--error' }, [\n\t\t\t\tcreateElement('div', { class: 'epnc-native-error-card', ref: 'errorCard' }, cardChildren),\n\t\t\t])\n\t\t}\n\t\tif (this.contentMode === 'content') {\n\t\t\treturn this.renderContentView(createElement, this.externalOpenUrl === ''\n\t\t\t\t? {}\n\t\t\t\t: {\n\t\t\t\t\tactions: [\n\t\t\t\t\t\tcreateElement('a', {\n\t\t\t\t\t\t\tclass: 'button 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Copyright (c) 2026 Jacob Bühler\n */\n\n/** Registers the pad MIME handler with the Viewer. */\n\nimport { registerHandler } from '@nextcloud/viewer'\n\nimport { MIME, VIEWER_HANDLER_ID } from './lib/constants.js'\nimport component from './viewer-main.js'\n\n// The options object itself, not a loader for it: the Viewer assigns its\n// Mime mixin onto what it is given and registers it under `component.name`,\n// and a function silently takes neither.\nregisterHandler({ id: VIEWER_HANDLER_ID, mimes: [MIME], component 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+{"version":3,"file":"etherpad_nextcloud-viewer-init.mjs","sources":["../node_modules/@nextcloud/viewer/dist/index.js","../src/lib/api-client.js","../src/lib/pad-frame-srcdoc.js","../src/viewer-main.js","../src/viewer-init.js"],"sourcesContent":["/*!\n * SPDX-FileCopyrightText: 2025 Nextcloud GmbH and Nextcloud contributors\n * SPDX-License-Identifier: AGPL-3.0-or-later\n */\n/**\n * Register a new handler for the viewer.\n * This needs to be called before the viewer is initialized to ensure the handler is available.\n * So this should be called from an initialization script (`OCP\\Util::addInitScript`).\n *\n * @param handler - The handler to register\n * @throws Error if the handler is invalid\n */\nexport function registerHandler(handler) {\n    validateHandler(handler);\n    window._oca_viewer_handlers ?? (window._oca_viewer_handlers = new Map());\n    if (window._oca_viewer_handlers.has(handler.id)) {\n        console.warn(`Handler with id ${handler.id} is already registered.`);\n        return;\n    }\n    window._oca_viewer_handlers.set(handler.id, handler);\n}\n/**\n * Validate the handler object.\n *\n * @param handler - The handler to validate\n */\nfunction validateHandler(handler) {\n    const { id, mimes, mimesAliases, component } = handler;\n    // checking valid handler id\n    if (!id || id.trim() === '' || typeof id !== 'string') {\n        throw new Error('The handler does not have a valid id');\n    }\n    // Nothing available to process! Failure\n    if ((!mimes || !Array.isArray(mimes)) && !mimesAliases) {\n        throw new Error('Handler needs a valid mime array or mimesAliases');\n    }\n    // checking valid handler component data\n    if ((!component || (typeof component !== 'object' && typeof component !== 'function'))) {\n        throw new Error('The handler does not have a valid component');\n    }\n}\n","/**\n * SPDX-License-Identifier: AGPL-3.0-or-later\n * Copyright (c) 2026 Jacob Bühler\n */\n\n/** Client helpers for pad resolution and snapshot recovery. */\n\nimport { APP_ID } from './constants.js'\nimport { ocGenerateUrl, ocRequestToken } from './oc-compat.js'\nimport { fetchJsonWithTimeout } from './fetch-helpers.js'\n\nconst RESOLVE_CACHE = new Map()\nconst RESOLVE_CACHE_MAX_ENTRIES = 50\nconst RESOLVE_CACHE_TTL_MS = 5 * 60 * 1000\n\n/**\n * Resolve a path to its pad metadata.\n *\n * Bypass the cache before a write. An entry is up to five minutes old, and\n * in five minutes a file can be moved and another `.pad` created at the\n * same path: for a read that is stale, for recovery it would bind a pad to\n * the wrong file.\n */\nexport const apiResolvePadByPath = async (path, { bypassCache = false } = {}) => {\n\tconst cacheKey = 'path:' + String(path)\n\tconst cached = bypassCache ? null : getResolveCache(cacheKey)\n\tif (cached !== null) {\n\t\treturn cached\n\t}\n\tconst url = ocGenerateUrl('/apps/' + APP_ID + '/api/v1/pads/resolve') + '?file=' + encodeURIComponent(path)\n\tconst request = fetchJson(url, {\n\t\tmethod: 'GET',\n\t\theaders: { Accept: 'application/json' },\n\t}, 'Pad resolve by path failed.')\n\t\t.catch((error) => {\n\t\t\tRESOLVE_CACHE.delete(cacheKey)\n\t\t\tthrow error\n\t\t})\n\tsetResolveCache(cacheKey, request)\n\treturn request\n}\n\nexport const apiFindOriginalPad = async (fileId) => {\n\tconst endpoint = ocGenerateUrl('/apps/' + APP_ID + '/api/v1/pads/find-original/' + encodeURIComponent(String(fileId)))\n\treturn fetchJson(endpoint, {\n\t\tmethod: 'GET',\n\t\theaders: { Accept: 'application/json' },\n\t}, 'Lookup failed.')\n}\n\nexport const apiRecoverFromSnapshot = async (fileId, path = '') => {\n\tconst endpoint = ocGenerateUrl('/apps/' + APP_ID + '/api/v1/pads/recover-from-snapshot/' + encodeURIComponent(String(fileId)))\n\t// A client timeout would not stop the server-side provisioning work.\n\tconst result = await fetchJsonWithTimeout(endpoint, {\n\t\tmethod: 'POST',\n\t\theaders: {\n\t\t\tAccept: 'application/json',\n\t\t\trequesttoken: ocRequestToken(),\n\t\t},\n\t}, { fallbackMessage: 'Recovery failed.', timeoutMs: null })\n\t// Only this path: flushing every entry would throw away answers for\n\t// unrelated files the session has already looked up.\n\tif (typeof path === 'string' && path !== '') {\n\t\tRESOLVE_CACHE.delete('path:' + path)\n\t}\n\treturn result\n}\nconst getResolveCache = (cacheKey) => {\n\tconst cached = RESOLVE_CACHE.get(cacheKey)\n\tif (!cached) {\n\t\treturn null\n\t}\n\tif ((Date.now() - cached.createdAt) > RESOLVE_CACHE_TTL_MS) {\n\t\tRESOLVE_CACHE.delete(cacheKey)\n\t\treturn null\n\t}\n\treturn cached.request\n}\n\nconst setResolveCache = (cacheKey, request) => {\n\tif (!RESOLVE_CACHE.has(cacheKey) && RESOLVE_CACHE.size >= RESOLVE_CACHE_MAX_ENTRIES) {\n\t\tconst oldestKey = RESOLVE_CACHE.keys().next().value\n\t\tif (oldestKey !== undefined) {\n\t\t\tRESOLVE_CACHE.delete(oldestKey)\n\t\t}\n\t}\n\tRESOLVE_CACHE.set(cacheKey, {\n\t\tcreatedAt: Date.now(),\n\t\trequest,\n\t})\n}\n\nconst fetchJson = async (url, options, fallbackMessage) =>\n\tfetchJsonWithTimeout(url, options, { fallbackMessage })\n","/**\n * SPDX-License-Identifier: AGPL-3.0-or-later\n * Copyright (c) 2026 Jacob Bühler\n */\n\nconst escapeAttribute = (value) => String(value || '')\n\t.replace(/&/g, '&amp;')\n\t.replace(/\"/g, '&quot;')\n\t.replace(/</g, '&lt;')\n\t.replace(/>/g, '&gt;')\n\nconst ALLOWED_PAD_URL_SCHEMES = ['http:', 'https:']\n\nconst isSafePadUrl = (url) => {\n\ttry {\n\t\tconst parsed = new URL(String(url || ''))\n\t\treturn ALLOWED_PAD_URL_SCHEMES.includes(parsed.protocol)\n\t\t\t&& parsed.username === ''\n\t\t\t&& parsed.password === ''\n\t} catch {\n\t\treturn false\n\t}\n}\n\nconst SRC_DOC_CSP = \"default-src 'none'; frame-src http: https:; style-src 'unsafe-inline'\"\n\nexport const buildPadFrameSrcdoc = (url) => {\n\tconst safeUrl = isSafePadUrl(url) ? escapeAttribute(url) : ''\n\treturn '<!doctype html><html><head><meta charset=\"utf-8\">'\n\t+ '<meta http-equiv=\"Content-Security-Policy\" content=\"' + escapeAttribute(SRC_DOC_CSP) + '\">'\n\t+ '<style>html,body,iframe{width:100%;height:100%;margin:0;border:0;overflow:hidden}iframe{display:block}</style>'\n\t+ '</head><body><iframe src=\"' + safeUrl + '\" title=\"Etherpad\"></iframe></body></html>'\n}\n","/**\n * SPDX-License-Identifier: AGPL-3.0-or-later\n * Copyright (c) 2026 Jacob Bühler\n */\n\n/** Nextcloud Viewer component for editable pads and read-only pad content. */\n\nimport { APP_ID } from './lib/constants.js'\nimport { apiFindOriginalPad, apiRecoverFromSnapshot, apiResolvePadByPath } from './lib/api-client.js'\nimport { fetchJsonWithTimeout, isUnanswered, requestErrorMessage } from './lib/fetch-helpers.js'\nimport { handFocusTo } from './lib/hand-focus.js'\nimport { ocGenerateUrl, ocRequestToken, translate } from './lib/oc-compat.js'\nimport { createPadSync } from './lib/pad-sync.js'\nimport { loadPadContent } from './lib/pad-content.js'\nimport { assertOpenPayload, contentUrlFrom, contentViewFrom, isMissingBindingError, isRetryableOpenError, openWithFrontmatterRecovery, padUrlFrom, syncSettingsFrom } from './lib/pad-open-flow.js'\nimport { buildPadFrameSrcdoc } from './lib/pad-frame-srcdoc.js'\nimport { isPadName, parsePadPathFromDavHref, parsePublicShareTokenFromLocation } from './lib/urls.js'\n\n// When nothing came back: our own sentence, not the browser's English.\nconst messageOf = (error, fallback) => requestErrorMessage(error, translate('Nextcloud did not answer. Check your connection and try again.'), fallback)\n\nconst component = {\n\tname: 'EtherpadNextcloudViewer',\n\tprops: {\n\t\tfilename: { type: String, required: false, default: '' },\n\t\tbasename: { type: String, required: false, default: '' },\n\t\tsource: { type: String, required: false, default: '' },\n\t\tfileid: { type: [String, Number], required: false, default: null },\n\t\tfileId: { type: [String, Number], required: false, default: null },\n\t\tfileInfo: { type: Object, required: false, default: null },\n\t},\n\tdata() {\n\t\treturn {\n\t\t\tiframeSrc: '',\n\t\t\tisLoading: true,\n\t\t\tloadError: '',\n\t\t\tcanRecover: false,\n\t\t\tcanRetryOpen: false,\n\t\t\tmaybeStaleFileId: false,\n\t\t\t// Recovery may resolve this from the path when Viewer supplies no id.\n\t\t\trecoveryFileId: null,\n\t\t\t// Kept with the id so recovery invalidates the matching cache entry.\n\t\t\trecoveryPath: '',\n\t\t\tisRecovering: false,\n\t\t\tisCheckingOriginal: false,\n\t\t\toriginalPad: null,\n\t\t\texternalOpenUrl: '',\n\t\t\tcontentMode: '',\n\t\t\tcontentUrl: '',\n\t\t\tcontentState: 'idle',\n\t\t\tcontentError: '',\n\t\t\tcontent: { html: '', isEmpty: false },\n\t\t\t// A refresh keeps previously loaded content visible.\n\t\t\tcontentLoaded: false,\n\t\t\t// Refreshes supersede each other without superseding the open.\n\t\t\tcontentGeneration: 0,\n\t\t\tresolveGeneration: 0,\n\t\t}\n\t},\n\tcomputed: {\n\t\tsourcePath() {\n\t\t\t// Whitespace inside the DAV URL is encoded; only surrounding noise is trimmed.\n\t\t\tconst value = typeof this.source === 'string' ? this.source.trim() : ''\n\t\t\tif (!value) return ''\n\t\t\treturn parsePadPathFromDavHref(value) || ''\n\t\t},\n\t\tfilePath() {\n\t\t\t// Whitespace is part of the name, not noise: `Notes .pad` and\n\t\t\t// `Notes.pad` are two files, and trimming here opened the wrong one.\n\t\t\tconst normalizeDir = (dir) => {\n\t\t\t\tif (!dir || dir === '/') return '/'\n\t\t\t\treturn dir.startsWith('/') ? dir : ('/' + dir)\n\t\t\t}\n\t\t\tconst joinPath = (dir, name) => {\n\t\t\t\tif (!name) return ''\n\t\t\t\tif (name.startsWith('/')) return name\n\t\t\t\tconst normalizedDir = normalizeDir(dir)\n\t\t\t\treturn normalizedDir === '/' ? '/' + name : normalizedDir + '/' + name\n\t\t\t}\n\t\t\tif (isPadName(this.sourcePath)) return this.sourcePath\n\n\t\t\tconst info = this.fileInfo && typeof this.fileInfo === 'object' ? this.fileInfo : null\n\t\t\tconst infoPath = info && typeof info.path === 'string' ? info.path : ''\n\t\t\tif (isPadName(infoPath)) return infoPath.startsWith('/') ? infoPath : ('/' + infoPath)\n\n\t\t\tconst baseName = String(this.filename || this.basename || (info && (info.name || info.basename)) || '')\n\t\t\tif (!baseName) return ''\n\n\t\t\tconst infoDir = info && typeof info.dirname === 'string' ? info.dirname : ''\n\t\t\tif (infoDir) {\n\t\t\t\tconst combined = joinPath(infoDir, baseName)\n\t\t\t\tif (isPadName(combined)) return combined\n\t\t\t}\n\n\t\t\tconst params = new URLSearchParams(window.location.search || '')\n\t\t\tconst urlDir = params.get('dir') || '/'\n\t\t\tconst fromDir = joinPath(urlDir, baseName)\n\t\t\tif (isPadName(fromDir)) return fromDir\n\t\t\treturn '/' + baseName\n\t\t},\n\t\topenKey() {\n\t\t\treturn `${this.resolvedFileId === null ? '' : this.resolvedFileId}::${this.filePath}`\n\t\t},\n\t\tresolvedFileId() {\n\t\t\tconst candidates = [this.fileid, this.fileId, this.fileInfo && (this.fileInfo.fileid || this.fileInfo.fileId || this.fileInfo.id)]\n\t\t\tfor (const candidate of candidates) {\n\t\t\t\tconst numeric = Number(candidate)\n\t\t\t\tif (Number.isFinite(numeric) && numeric > 0) return numeric\n\t\t\t}\n\t\t\t// Route ids can outlive the item shown after Viewer navigation.\n\t\t\treturn null\n\t\t},\n\t},\n\twatch: {\n\t\t// A file swap changes path and id together; open it only once.\n\t\topenKey: { immediate: true, handler() { void this.resolveOpenUrl() } },\n\t},\n\tmethods: {\n\t\tasync fetchOpenPayload(url, init = {}) {\n\t\t\treturn assertOpenPayload(await fetchJsonWithTimeout(url, Object.assign({ method: 'GET' }, init)))\n\t\t},\n\t\tasync initializeMissingFrontmatter() {\n\t\t\tconst headers = {\n\t\t\t\tAccept: 'application/json',\n\t\t\t\trequesttoken: ocRequestToken(),\n\t\t\t}\n\n\t\t\t// A client timeout would not stop the server-side provisioning work.\n\t\t\tconst initOptions = { timeoutMs: null, fallbackMessage: 'Pad initialization failed.' }\n\n\t\t\tconst announceMigratedStatus = (data) => {\n\t\t\t\tif (data && data.status === 'migrated_from_legacy') {\n\t\t\t\t\tconsole.info('Legacy Ownpad .pad migrated to managed format on first open.')\n\t\t\t\t}\n\t\t\t}\n\n\t\t\tif (this.resolvedFileId !== null) {\n\t\t\t\tconst url = ocGenerateUrl('/apps/' + APP_ID + '/api/v1/pads/initialize-by-id/' + encodeURIComponent(String(this.resolvedFileId)))\n\t\t\t\tconst data = await fetchJsonWithTimeout(url, { method: 'POST', headers }, initOptions)\n\t\t\t\tannounceMigratedStatus(data)\n\t\t\t\treturn data\n\t\t\t}\n\n\t\t\tif (!this.filePath) {\n\t\t\t\tthrow new Error('Pad initialization failed: missing file path.')\n\t\t\t}\n\n\t\t\tconst body = new URLSearchParams()\n\t\t\tbody.set('file', this.filePath)\n\t\t\tconst url = ocGenerateUrl('/apps/' + APP_ID + '/api/v1/pads/initialize')\n\t\t\tconst data = await fetchJsonWithTimeout(url, {\n\t\t\t\tmethod: 'POST',\n\t\t\t\theaders: Object.assign({}, headers, {\n\t\t\t\t\t'Content-Type': 'application/x-www-form-urlencoded;charset=UTF-8',\n\t\t\t\t}),\n\t\t\t\tbody: body.toString(),\n\t\t\t}, initOptions)\n\t\t\tannounceMigratedStatus(data)\n\t\t\treturn data\n\t\t},\n\t\t/** Resolve a fresh id for recovery without changing the opened file. */\n\t\tasync resolveRecoveryFileId(openPath) {\n\t\t\ttry {\n\t\t\t\tconst resolved = await apiResolvePadByPath(openPath, { bypassCache: true })\n\t\t\t\tconst id = Number(resolved && resolved.file_id)\n\t\t\t\treturn Number.isFinite(id) && id > 0 ? id : null\n\t\t\t} catch {\n\t\t\t\treturn null\n\t\t\t}\n\t\t},\n\t\tmarkLoaded() {\n\t\t\tthis.$emit('update:loaded', true)\n\t\t},\n\t\t/**\n\t\t * See handFocusTo(). On the next tick, once the card is drawn: call\n\t\t * it after setting what the card shows.\n\t\t */\n\t\thandFocusToErrorCard() {\n\t\t\tthis.$nextTick(() => {\n\t\t\t\tconst card = this.$refs.errorCard\n\t\t\t\tif (card instanceof HTMLElement) {\n\t\t\t\t\thandFocusTo(card, card.querySelector('.epnc-native-error-message'))\n\t\t\t\t}\n\t\t\t})\n\t\t},\n\t\t// Keep the sync controller non-reactive and available to the immediate watcher.\n\t\tpadSync() {\n\t\t\tif (!this._padSync) {\n\t\t\t\tthis._padSync = createPadSync({ requestToken: () => ocRequestToken() })\n\t\t\t}\n\t\t\treturn this._padSync\n\t\t},\n\t\t// Do not create a controller solely to tear it down.\n\t\tteardownSync() {\n\t\t\tif (!this._padSync) {\n\t\t\t\treturn\n\t\t\t}\n\t\t\tthis._padSync.fireAndForget(true, true)\n\t\t\tthis._padSync.stop()\n\t\t\tthis._padSync.removeLifecycleHandlers()\n\t\t},\n\t\t/** $afterClick: see handFocusToErrorCard(). */\n\t\tasync resolveOpenUrl(afterClick = false) {\n\t\t\tconst generation = ++this.resolveGeneration\n\t\t\tconst isCurrent = () => generation === this.resolveGeneration\n\t\t\t// Discarding a result is insufficient: a completed request may mint a session.\n\t\t\tthis._openAbort?.abort()\n\t\t\tconst abort = typeof AbortController === 'function' ? new AbortController() : null\n\t\t\tthis._openAbort = abort\n\n\t\t\tthis.isLoading = true\n\t\t\tthis.loadError = ''\n\t\t\tthis.canRecover = false\n\t\t\tthis.canRetryOpen = false\n\t\t\tthis.maybeStaleFileId = false\n\t\t\tthis.recoveryFileId = null\n\t\t\tthis.recoveryPath = ''\n\t\t\tthis.isCheckingOriginal = false\n\t\t\tthis.originalPad = null\n\t\t\tthis.iframeSrc = ''\n\t\t\tthis.externalOpenUrl = ''\n\t\t\tthis.contentMode = ''\n\t\t\tthis.contentUrl = ''\n\t\t\tthis.contentState = 'idle'\n\t\t\tthis.contentError = ''\n\t\t\tthis.content = { html: '', isEmpty: false }\n\t\t\tthis.contentLoaded = false\n\t\t\tthis._contentAbort?.abort()\n\t\t\t// Do not construct a sync controller while resetting viewer state.\n\t\t\tif (this._padSync) {\n\t\t\t\tthis._padSync.stop()\n\t\t\t\tthis._padSync.configure({ syncUrl: '' })\n\t\t\t}\n\n\t\t\tif (!this.filePath) {\n\t\t\t\tif (!isCurrent()) return\n\t\t\t\tthis.loadError = 'No .pad file selected.'\n\t\t\t\tthis.isLoading = false\n\t\t\t\treturn\n\t\t\t}\n\n\t\t\t// Viewer props may change before the watcher starts the next open.\n\t\t\tconst openPath = this.filePath\n\t\t\tconst publicToken = parsePublicShareTokenFromLocation()\n\t\t\tconst byPublicUrl = (() => {\n\t\t\t\tif (!publicToken) return ''\n\t\t\t\tconst url = new URL(ocGenerateUrl('/apps/' + APP_ID + '/api/v1/public/open/' + encodeURIComponent(publicToken)), window.location.origin)\n\t\t\t\t// The public endpoint rejects conflicting id and path locators.\n\t\t\t\tif (this.resolvedFileId !== null) {\n\t\t\t\t\turl.searchParams.set('fileId', String(this.resolvedFileId))\n\t\t\t\t} else {\n\t\t\t\t\turl.searchParams.set('file', openPath)\n\t\t\t\t}\n\t\t\t\treturn url.toString()\n\t\t\t})()\n\t\t\tconst openPostHeaders = {\n\t\t\t\t'Content-Type': 'application/x-www-form-urlencoded;charset=UTF-8',\n\t\t\t\trequesttoken: ocRequestToken(),\n\t\t\t}\n\n\t\t\ttry {\n\t\t\t\tconst fetchOpenData = async () => {\n\t\t\t\t\t// Never retry a refused id by path: it could identify a different file.\n\t\t\t\t\tconst signal = abort ? abort.signal : undefined\n\t\t\t\t\tif (byPublicUrl) {\n\t\t\t\t\t\treturn await this.fetchOpenPayload(byPublicUrl, { signal })\n\t\t\t\t\t}\n\t\t\t\t\t// One way in, chosen once. An open by id that retries by\n\t\t\t\t\t// path is how a refused id ended up opening whatever the\n\t\t\t\t\t// path pointed at.\n\t\t\t\t\tif (this.resolvedFileId !== null) {\n\t\t\t\t\t\tconst byIdBody = new URLSearchParams()\n\t\t\t\t\t\tbyIdBody.set('fileId', String(this.resolvedFileId))\n\t\t\t\t\t\treturn await this.fetchOpenPayload(\n\t\t\t\t\t\t\tocGenerateUrl('/apps/' + APP_ID + '/api/v1/pads/open-by-id'),\n\t\t\t\t\t\t\t{ method: 'POST', headers: openPostHeaders, body: byIdBody.toString(), signal },\n\t\t\t\t\t\t)\n\t\t\t\t\t}\n\t\t\t\t\tconst byPathBody = new URLSearchParams()\n\t\t\t\t\tbyPathBody.set('file', openPath)\n\t\t\t\t\treturn await this.fetchOpenPayload(\n\t\t\t\t\t\tocGenerateUrl('/apps/' + APP_ID + '/api/v1/pads/open'),\n\t\t\t\t\t\t{ method: 'POST', headers: openPostHeaders, body: byPathBody.toString(), signal },\n\t\t\t\t\t)\n\t\t\t\t}\n\n\t\t\t\tconst data = await openWithFrontmatterRecovery({\n\t\t\t\t\topen: fetchOpenData,\n\t\t\t\t\tinitialize: () => this.initializeMissingFrontmatter(),\n\t\t\t\t\tstillWanted: isCurrent,\n\t\t\t\t})\n\t\t\t\tif (data === null || !isCurrent()) return\n\n\t\t\t\tconst { syncUrl, intervalMs } = syncSettingsFrom(data)\n\n\t\t\t\tthis.padSync().configure({ syncUrl, intervalMs })\n\t\t\t\tthis.padSync().installLifecycleHandlers()\n\t\t\t\tif (syncUrl) {\n\t\t\t\t\tthis.padSync().start()\n\t\t\t\t}\n\n\t\t\t\tconst contentUrl = contentUrlFrom(data)\n\n\t\t\t\tconst { isContentView, externalUrl } = contentViewFrom(data)\n\t\t\t\tif (isContentView) {\n\t\t\t\t\tthis.externalOpenUrl = externalUrl\n\t\t\t\t\tthis.contentUrl = contentUrl\n\t\t\t\t\tthis.contentMode = 'content'\n\t\t\t\t\tthis.markLoaded()\n\t\t\t\t\t// Draw the content view while its body loads.\n\t\t\t\t\tvoid this.loadContent()\n\t\t\t\t\treturn\n\t\t\t\t}\n\n\t\t\t\tthis.iframeSrc = padUrlFrom(data)\n\t\t\t\tthis.markLoaded()\n\t\t\t} catch (error) {\n\t\t\t\tif (!isCurrent()) return\n\t\t\t\tthis.loadError = messageOf(error, 'Could not load pad.')\n\t\t\t\t// The server intentionally does not disclose why this id is unavailable.\n\t\t\t\tthis.maybeStaleFileId = this.resolvedFileId !== null\n\t\t\t\t\t&& Boolean(error) && error.status === 404 && !error.code\n\t\t\t\tthis.canRetryOpen = isRetryableOpenError(error)\n\t\t\t\t// Recovery may resolve only the same path that failed to open.\n\t\t\t\tlet recoveryFileId = this.resolvedFileId\n\t\t\t\tthis.recoveryPath = openPath\n\t\t\t\tif (recoveryFileId === null && !byPublicUrl && isMissingBindingError(error)) {\n\t\t\t\t\trecoveryFileId = await this.resolveRecoveryFileId(openPath)\n\t\t\t\t\t// A late lookup must not attach recovery to a newer Viewer item.\n\t\t\t\t\tif (!isCurrent()) return\n\t\t\t\t}\n\t\t\t\tthis.recoveryFileId = recoveryFileId\n\t\t\t\tthis.canRecover = isMissingBindingError(error)\n\t\t\t\t\t&& recoveryFileId !== null\n\t\t\t\t\t&& !byPublicUrl\n\t\t\t\tif (this.canRecover) {\n\t\t\t\t\tthis.fetchOriginalPadHint(isCurrent, afterClick)\n\t\t\t\t} else if (afterClick) {\n\t\t\t\t\tthis.handFocusToErrorCard()\n\t\t\t\t}\n\t\t\t\tthis.markLoaded()\n\t\t\t} finally {\n\t\t\t\tif (!isCurrent()) return\n\t\t\t\tthis.isLoading = false\n\t\t\t}\n\t\t},\n\t\t/** $afterClick: the focus waits for the card's final actions. */\n\t\tasync fetchOriginalPadHint(isCurrent, afterClick = false) {\n\t\t\tif (this.recoveryFileId === null) {\n\t\t\t\treturn\n\t\t\t}\n\t\t\tthis.isCheckingOriginal = true\n\t\t\ttry {\n\t\t\t\tconst hint = await apiFindOriginalPad(this.recoveryFileId)\n\t\t\t\tif (!isCurrent()) return\n\t\t\t\tif (hint && hint.found === true && typeof hint.viewer_url === 'string' && hint.viewer_url !== '') {\n\t\t\t\t\tthis.originalPad = {\n\t\t\t\t\t\tviewerUrl: hint.viewer_url,\n\t\t\t\t\t\tpath: typeof hint.path === 'string' ? hint.path : '',\n\t\t\t\t\t}\n\t\t\t\t}\n\t\t\t} catch {\n\t\t\t\t// Recovery remains available without an original-file hint.\n\t\t\t} finally {\n\t\t\t\tif (isCurrent()) {\n\t\t\t\t\tthis.isCheckingOriginal = false\n\t\t\t\t\tif (afterClick) {\n\t\t\t\t\t\tthis.handFocusToErrorCard()\n\t\t\t\t\t}\n\t\t\t\t}\n\t\t\t}\n\t\t},\n\t\tasync recoverFromSnapshot() {\n\t\t\tif (!this.canRecover || this.isRecovering || this.recoveryFileId === null) {\n\t\t\t\treturn\n\t\t\t}\n\t\t\tthis.isRecovering = true\n\t\t\ttry {\n\t\t\t\tawait apiRecoverFromSnapshot(this.recoveryFileId, this.recoveryPath)\n\t\t\t\tthis.loadError = ''\n\t\t\t\tthis.canRecover = false\n\t\t\t\tawait this.resolveOpenUrl(true)\n\t\t\t} catch (error) {\n\t\t\t\t// No answer: the pad may be set up by now, and another\n\t\t\t\t// recovery would meet it. Opening tells, and is safe to repeat.\n\t\t\t\tif (isUnanswered(error)) {\n\t\t\t\t\tawait this.resolveOpenUrl(true)\n\t\t\t\t\treturn\n\t\t\t\t}\n\t\t\t\t// Enabled again before the card is drawn, so the focus lands.\n\t\t\t\tthis.isRecovering = false\n\t\t\t\tthis.loadError = messageOf(error, 'Could not load pad.')\n\t\t\t\t// The clicked button lost the focus while it was disabled.\n\t\t\t\tthis.handFocusToErrorCard()\n\t\t\t} finally {\n\t\t\t\tthis.isRecovering = false\n\t\t\t}\n\t\t},\n\t\t/** Refresh content through an endpoint that re-checks access. */\n\t\tasync loadContent() {\n\t\t\tconst openGeneration = this.resolveGeneration\n\t\t\tthis.contentGeneration += 1\n\t\t\tconst generation = this.contentGeneration\n\t\t\tconst isCurrent = () => generation === this.contentGeneration\n\t\t\t\t&& openGeneration === this.resolveGeneration\n\n\t\t\tif (this.contentUrl === '') {\n\t\t\t\tthis.contentState = 'error'\n\t\t\t\tthis.contentError = translate('The server did not say where to load this pad from.')\n\t\t\t\treturn\n\t\t\t}\n\n\t\t\tthis._contentAbort?.abort()\n\t\t\t// Abort superseded content refreshes.\n\t\t\tconst abort = typeof AbortController === 'function' ? new AbortController() : null\n\t\t\tthis._contentAbort = abort\n\t\t\tthis.contentState = 'loading'\n\t\t\tthis.contentError = ''\n\n\t\t\ttry {\n\t\t\t\tconst content = await loadPadContent(this.contentUrl, { signal: abort?.signal })\n\t\t\t\tif (!isCurrent()) return\n\t\t\t\tthis.content = content\n\t\t\t\tthis.contentLoaded = true\n\t\t\t\tthis.contentState = 'ready'\n\t\t\t} catch (error) {\n\t\t\t\tif (!isCurrent() || (error && error.name === 'AbortError')) return\n\t\t\t\tthis.contentState = 'error'\n\t\t\t\tthis.contentError = messageOf(error, translate('Could not load the pad content.'))\n\t\t\t}\n\t\t},\n\t\trenderContentView(createElement, options) {\n\t\t\tconst extraActions = Array.isArray(options.actions) ? options.actions : []\n\t\t\tconst isBusy = this.contentState === 'loading'\n\n\t\t\treturn createElement('div', { class: 'epnc-pad-doc' }, [\n\t\t\t\tcreateElement('div', { class: 'epnc-pad-doc__inner' }, [\n\t\t\t\t\tcreateElement('div', { class: 'epnc-pad-doc__toolbar' }, [\n\t\t\t\t\t\t(this.contentState === 'error' && this.contentLoaded)\n\t\t\t\t\t\t\t? createElement('span', { class: 'epnc-pad-doc__toolbar-error' },\n\t\t\t\t\t\t\t\tthis.contentError || translate('Could not load the pad content.'))\n\t\t\t\t\t\t\t: null,\n\t\t\t\t\t\tcreateElement('button', {\n\t\t\t\t\t\t\tclass: 'button epnc-pad-doc__refresh',\n\t\t\t\t\t\t\tattrs: { type: 'button', disabled: isBusy },\n\t\t\t\t\t\t\ton: { click: () => { void this.loadContent() } },\n\t\t\t\t\t\t}, isBusy ? translate('Refreshing...') : translate('Refresh')),\n\t\t\t\t\t\t...extraActions,\n\t\t\t\t\t]),\n\t\t\t\t\tthis.renderContentBody(createElement),\n\t\t\t\t]),\n\t\t\t])\n\t\t},\n\t\trenderContentBody(createElement) {\n\t\t\tif (this.contentLoaded && this.contentState !== 'ready') {\n\t\t\t\treturn this.renderContentText(createElement)\n\t\t\t}\n\t\t\tif (this.contentState === 'error') {\n\t\t\t\treturn createElement('div', { class: 'epnc-pad-doc__text epnc-pad-doc__status' }, [\n\t\t\t\t\tcreateElement('div', {},\n\t\t\t\t\t\tthis.contentError || translate('Could not load the pad content.')),\n\t\t\t\t\tcreateElement('button', {\n\t\t\t\t\t\tclass: 'button primary',\n\t\t\t\t\t\tattrs: { type: 'button' },\n\t\t\t\t\t\ton: { click: () => { void this.loadContent() } },\n\t\t\t\t\t}, translate('Try again')),\n\t\t\t\t])\n\t\t\t}\n\t\t\tif (this.contentState !== 'ready') {\n\t\t\t\treturn createElement('div', { class: 'epnc-pad-doc__text epnc-pad-doc__status' }, translate('Loading pad content...'))\n\t\t\t}\n\t\t\treturn this.renderContentText(createElement)\n\t\t},\n\t\trenderContentText(createElement) {\n\t\t\tif (this.content.isEmpty) {\n\t\t\t\treturn createElement('div', { class: 'epnc-pad-doc__text epnc-pad-doc__status' }, translate('This pad is still empty.'))\n\t\t\t}\n\t\t\treturn createElement('div', {\n\t\t\t\tclass: 'epnc-pad-doc__text epnc-pad-doc__text--html',\n\t\t\t\tdomProps: { innerHTML: this.content.html },\n\t\t\t})\n\t\t},\n\t},\n\tbeforeDestroy() {\n\t\tthis.resolveGeneration += 1\n\t\t// Abort work that could otherwise finish after teardown.\n\t\tthis._openAbort?.abort()\n\t\tthis._contentAbort?.abort()\n\t\tthis.teardownSync()\n\t},\n\tbeforeUnmount() {\n\t\tthis.resolveGeneration += 1\n\t\tthis._openAbort?.abort()\n\t\tthis._contentAbort?.abort()\n\t\tthis.teardownSync()\n\t},\n\trender(createElement) {\n\t\tif (this.loadError) {\n\t\t\tconst cardChildren = [\n\t\t\t\tcreateElement('div', { class: 'epnc-native-error-title' }, translate('Could not open pad')),\n\t\t\t\t// Read out when it appears, not only when someone looks.\n\t\t\t\tcreateElement('div', { class: 'epnc-native-error-message', attrs: { role: 'alert' } }, this.loadError),\n\t\t\t]\n\t\t\tif (this.maybeStaleFileId) {\n\t\t\t\tcardChildren.push(\n\t\t\t\t\tcreateElement('div', { class: 'epnc-native-error-message' },\n\t\t\t\t\t\ttranslate('This file may have been moved or replaced since the list was loaded. Reload the page and open it again.')),\n\t\t\t\t)\n\t\t\t}\n\t\t\tif (this.canRetryOpen) {\n\t\t\t\tcardChildren.push(\n\t\t\t\t\tcreateElement('button', {\n\t\t\t\t\t\tclass: 'button primary epnc-native-error-action',\n\t\t\t\t\t\tattrs: { type: 'button' },\n\t\t\t\t\t\ton: { click: () => { void this.resolveOpenUrl(true) } },\n\t\t\t\t\t}, translate('Try again')),\n\t\t\t\t)\n\t\t\t}\n\t\t\tif (this.canRecover) {\n\t\t\t\tif (this.isCheckingOriginal) {\n\t\t\t\t\t// Wait before choosing the primary recovery action.\n\t\t\t\t\tcardChildren.push(\n\t\t\t\t\t\tcreateElement('div', { class: 'epnc-native-error-message' },\n\t\t\t\t\t\t\ttranslate('Checking for the original pad...')),\n\t\t\t\t\t)\n\t\t\t\t} else if (this.originalPad) {\n\t\t\t\t\tcardChildren.push(\n\t\t\t\t\t\tcreateElement('div', { class: 'epnc-native-error-message' },\n\t\t\t\t\t\t\ttranslate('This file looks like a copy of an existing .pad file in your account. Open the original to keep editing the linked pad, or create a new pad to fork the content stored in this file.')),\n\t\t\t\t\t\tcreateElement('a', {\n\t\t\t\t\t\t\tclass: 'button primary epnc-native-error-action',\n\t\t\t\t\t\t\tattrs: { href: this.originalPad.viewerUrl },\n\t\t\t\t\t\t}, translate('Open the original .pad file')),\n\t\t\t\t\t\tcreateElement('button', {\n\t\t\t\t\t\t\tclass: 'button epnc-native-error-action',\n\t\t\t\t\t\t\tattrs: { type: 'button', disabled: this.isRecovering },\n\t\t\t\t\t\t\ton: { click: () => { void this.recoverFromSnapshot() } },\n\t\t\t\t\t\t}, this.isRecovering ? translate('Creating new pad...') : translate('Create new pad from this file')),\n\t\t\t\t\t)\n\t\t\t\t} else {\n\t\t\t\t\tcardChildren.push(\n\t\t\t\t\t\tcreateElement('div', { class: 'epnc-native-error-message' },\n\t\t\t\t\t\t\ttranslate(\"We couldn't find a matching pad in this Nextcloud. You can create a new pad from the text stored in this file; from then on, opening this file will load the new pad.\")),\n\t\t\t\t\t\tcreateElement('button', {\n\t\t\t\t\t\t\tclass: 'button primary epnc-native-error-action',\n\t\t\t\t\t\t\tattrs: { type: 'button', disabled: this.isRecovering },\n\t\t\t\t\t\t\ton: { click: () => { void this.recoverFromSnapshot() } },\n\t\t\t\t\t\t}, this.isRecovering ? translate('Creating new pad...') : translate('Create new pad from this file')),\n\t\t\t\t\t)\n\t\t\t\t}\n\t\t\t}\n\t\t\treturn createElement('div', { class: 'epnc-native-status epnc-native-status--error' }, [\n\t\t\t\tcreateElement('div', { class: 'epnc-native-error-card', ref: 'errorCard' }, cardChildren),\n\t\t\t])\n\t\t}\n\t\tif (this.contentMode === 'content') {\n\t\t\treturn this.renderContentView(createElement, this.externalOpenUrl === ''\n\t\t\t\t? {}\n\t\t\t\t: {\n\t\t\t\t\tactions: [\n\t\t\t\t\t\tcreateElement('a', {\n\t\t\t\t\t\t\tclass: 'button epnc-pad-doc__link',\n\t\t\t\t\t\t\tattrs: {\n\t\t\t\t\t\t\t\thref: this.externalOpenUrl,\n\t\t\t\t\t\t\t\ttarget: '_blank',\n\t\t\t\t\t\t\t\trel: 'noopener noreferrer',\n\t\t\t\t\t\t\t},\n\t\t\t\t\t\t}, translate('Open original pad')),\n\t\t\t\t\t],\n\t\t\t\t})\n\t\t}\n\t\tif (this.isLoading || !this.iframeSrc) {\n\t\t\treturn createElement('div', { class: 'epnc-native-status' }, 'Loading pad...')\n\t\t}\n\n\t\treturn createElement('div', { class: 'epnc-native-shell' }, [\n\t\t\t// Nextcloud inspects direct iframe children, so keep this wrapper same-origin.\n\t\t\tcreateElement('iframe', {\n\t\t\t\tattrs: { srcdoc: buildPadFrameSrcdoc(this.iframeSrc), title: 'Etherpad' },\n\t\t\t\t// Etherpad provides its own loading state inside the nested iframe.\n\t\t\t\ton: { load: () => this.markLoaded(), error: () => this.markLoaded() },\n\t\t\t\tclass: 'epnc-native-iframe',\n\t\t\t}),\n\t\t])\n\t},\n}\n\nexport default component\n","/**\n * SPDX-License-Identifier: AGPL-3.0-or-later\n * 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diff --git a/js/fetch-helpers-BUxbvlK6.chunk.mjs b/js/fetch-helpers-BUxbvlK6.chunk.mjs
new file mode 100644
index 00000000..a9394942
--- /dev/null
+++ b/js/fetch-helpers-BUxbvlK6.chunk.mjs
@@ -0,0 +1,2 @@
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+//# sourceMappingURL=fetch-helpers-BUxbvlK6.chunk.mjs.map
diff --git a/js/fetch-helpers-Dqr3YYFE.chunk.mjs.license b/js/fetch-helpers-BUxbvlK6.chunk.mjs.license
similarity index 100%
rename from js/fetch-helpers-Dqr3YYFE.chunk.mjs.license
rename to js/fetch-helpers-BUxbvlK6.chunk.mjs.license
diff --git a/js/fetch-helpers-BUxbvlK6.chunk.mjs.map b/js/fetch-helpers-BUxbvlK6.chunk.mjs.map
new file mode 100644
index 00000000..967d6528
--- /dev/null
+++ b/js/fetch-helpers-BUxbvlK6.chunk.mjs.map
@@ -0,0 +1 @@
+{"version":3,"file":"fetch-helpers-BUxbvlK6.chunk.mjs","sources":["../src/lib/constants.js","../src/lib/oc-compat.js","../src/lib/fetch-helpers.js"],"sourcesContent":["/**\n * SPDX-License-Identifier: AGPL-3.0-or-later\n * Copyright (c) 2026 Jacob Bühler\n */\n\nexport const APP_ID = 'etherpad_nextcloud'\nexport const MIME = 'application/x-etherpad-nextcloud'\nexport const VIEWER_HANDLER_ID = 'etherpad_nextcloud'\n\n/** The kinds of pad this app makes. PadAccessMode.php is the same list. */\nexport const PAD_ACCESS_MODES = Object.freeze(['protected', 'public'])\n\n/** What a caller gets for asking for none. PadCreateController spells it too. */\nexport const DEFAULT_PAD_ACCESS_MODE = 'protected'\n\n/**\n * @param {unknown} value\n * @return {boolean}\n */\nexport const isPadAccessMode = (value) => PAD_ACCESS_MODES.includes(value)\n","/**\n * SPDX-License-Identifier: AGPL-3.0-or-later\n * Copyright (c) 2026 Jacob Bühler\n */\n\nimport { APP_ID } from './constants.js'\n\nexport const ocGenerateUrl = (path) => {\n\tif (window.OC && typeof window.OC.generateUrl === 'function') {\n\t\treturn window.OC.generateUrl(path)\n\t}\n\treturn '/index.php' + path\n}\n\nexport const ocRequestToken = (fallback = '') => {\n\tconst configuredFallback = String(fallback || '').trim()\n\tif (configuredFallback !== '') {\n\t\treturn configuredFallback\n\t}\n\treturn String((window.OC && window.OC.requestToken) || '')\n}\n\nexport const translate = (text) => (typeof window.t === 'function' ? window.t(APP_ID, text) : text)\n","/**\n * SPDX-License-Identifier: AGPL-3.0-or-later\n * Copyright (c) 2026 Jacob Bühler\n */\n\nconst DEFAULT_REQUEST_TIMEOUT_MS = 10000\nconst GATEWAY_STATUSES = [502, 503, 504]\n\n/**\n * `init.signal` is chained rather than replaced: the timeout needs a\n * controller of its own, and a caller that brought a signal — a viewer\n * abandoning an open, say — must still be able to cancel. Whichever fires\n * first wins.\n *\n * `timeoutMs: null` waits indefinitely, and is for requests that *write*.\n * Cutting a read short costs a retry; cutting a write short applies the\n * change with nobody left to read the outcome — a recovery that has\n * created its pad but not yet its binding looks unrecovered, and the\n * retry then either collides with the binding it did write or provisions\n * a second pad and orphans the first. Slow is not the same as stuck.\n *\n * An error carries the server's `code` and `retryable` when it sent them,\n * `status` whenever one came, and `unanswered` when nothing came back from\n * this app (docs/architecture.md, \"Errors of the API\", says which failures\n * count). Only that fact: whether the same request is worth another try\n * depends on whether it writes, which the caller knows\n * (`isRetryableOpenError` for an open).\n */\nexport const fetchJsonWithTimeout = async (url, init = {}, options = {}) => {\n\tconst { timeoutMs = DEFAULT_REQUEST_TIMEOUT_MS, fallbackMessage = 'Request failed.' } = options\n\tconst controller = new AbortController()\n\tconst timeoutId = timeoutMs === null || timeoutMs === 0\n\t\t? null\n\t\t: window.setTimeout(() => controller.abort(), timeoutMs)\n\tconst callerSignal = init.signal\n\tlet abortOnCaller\n\tif (callerSignal) {\n\t\tif (callerSignal.aborted) {\n\t\t\tcontroller.abort()\n\t\t} else {\n\t\t\tabortOnCaller = () => controller.abort()\n\t\t\tcallerSignal.addEventListener('abort', abortOnCaller)\n\t\t}\n\t}\n\tconst headers = Object.assign({ Accept: 'application/json' }, init.headers || {})\n\tlet status = null\n\ttry {\n\t\tconst response = await fetch(url, Object.assign({}, init, {\n\t\t\tcredentials: 'same-origin',\n\t\t\theaders,\n\t\t\tsignal: controller.signal,\n\t\t}))\n\t\tstatus = response.status\n\t\t// Only a body that is not JSON counts as none. A timeout or a failed\n\t\t// network while it streams in is no answer, and is handled below.\n\t\tlet isJson = true\n\t\tconst data = await response.json().catch((error) => {\n\t\t\tif (!(error instanceof SyntaxError)) {\n\t\t\t\tthrow error\n\t\t\t}\n\t\t\tisJson = false\n\t\t\treturn {}\n\t\t})\n\t\tif (!response.ok) {\n\t\t\tconst error = new Error((data && data.message) || fallbackMessage)\n\t\t\tif (data && typeof data.code === 'string') {\n\t\t\t\terror.code = data.code\n\t\t\t}\n\t\t\t// The server's word that the same request may succeed later (the\n\t\t\t// cases are in docs/api-reference.md).\n\t\t\tif (data && data.retryable === true) {\n\t\t\t\terror.retryable = true\n\t\t\t}\n\t\t\t// A 5xx that cannot be this app's (docs/architecture.md, \"Errors of the API\").\n\t\t\tconst isGateway = GATEWAY_STATUSES.includes(response.status) && error.retryable !== true\n\t\t\tif (response.status >= 500 && (!isJson || isGateway)) {\n\t\t\t\terror.unanswered = true\n\t\t\t}\n\t\t\terror.status = response.status\n\t\t\tthrow error\n\t\t}\n\t\treturn data\n\t} catch (error) {\n\t\tif (error && typeof error === 'object' && 'name' in error && error.name === 'AbortError') {\n\t\t\t// A caller's own abort is not a timeout. No caller distinguishes\n\t\t\t// them today — both recognise a superseded request by the\n\t\t\t// generation guard instead — but rewriting a deliberate abort as\n\t\t\t// \"Request timed out.\" would be a lie the moment one does.\n\t\t\tif (timeoutId === null || (callerSignal && callerSignal.aborted)) {\n\t\t\t\tthrow error\n\t\t\t}\n\t\t\tconst timedOut = new Error('Request timed out.')\n\t\t\ttimedOut.unanswered = true\n\t\t\tif (status !== null) {\n\t\t\t\ttimedOut.status = status\n\t\t\t}\n\t\t\tthrow timedOut\n\t\t}\n\t\t// fetch() and reading the body reject with a TypeError when the\n\t\t// network fails.\n\t\tif (error instanceof TypeError) {\n\t\t\terror.unanswered = true\n\t\t\tif (status !== null) {\n\t\t\t\terror.status = status\n\t\t\t}\n\t\t}\n\t\tthrow error\n\t} finally {\n\t\tif (timeoutId !== null) {\n\t\t\twindow.clearTimeout(timeoutId)\n\t\t}\n\t\tif (abortOnCaller) {\n\t\t\tcallerSignal.removeEventListener('abort', abortOnCaller)\n\t\t}\n\t}\n}\n\n/**\n * Whether nothing came back from this app (see fetchJsonWithTimeout()).\n *\n * @param {unknown} error\n * @return {boolean}\n */\nexport const isUnanswered = (error) => Boolean(error) && error.unanswered === true\n\n/**\n * What to show for a failed request: the server's sentence, or, when\n * nothing came back, the caller's translated `unansweredText` rather than\n * the browser's own English (\"Failed to fetch\", \"Load failed\", ...).\n *\n * @param {unknown} error\n * @param {string} unansweredText\n * @param {string} fallbackText\n * @return {string}\n */\nexport const requestErrorMessage = (error, unansweredText, fallbackText) => {\n\tif (isUnanswered(error)) {\n\t\treturn unansweredText\n\t}\n\treturn error instanceof Error && error.message ? error.message : fallbackText\n}\n"],"names":["APP_ID","MIME","VIEWER_HANDLER_ID","PAD_ACCESS_MODES","DEFAULT_PAD_ACCESS_MODE","isPadAccessMode","value","ocGenerateUrl","path","ocRequestToken","fallback","configuredFallback","translate","text","DEFAULT_REQUEST_TIMEOUT_MS","GATEWAY_STATUSES","fetchJsonWithTimeout","url","init","options","timeoutMs","fallbackMessage","controller","timeoutId","callerSignal","abortOnCaller","headers","status","response","isJson","data","error","isGateway","timedOut","isUnanswered","requestErrorMessage","unansweredText","fallbackText"],"mappings":"MAKaA,EAAS,qBACTC,EAAO,mCACPC,EAAoB,qBAGpBC,EAAmB,OAAO,OAAO,CAAC,YAAa,QAAQ,CAAC,EAGxDC,EAA0B,YAM1BC,EAAmBC,GAAUH,EAAiB,SAASG,CAAK,ECZ5DC,EAAiBC,GACzB,OAAO,IAAM,OAAO,OAAO,GAAG,aAAgB,WAC1C,OAAO,GAAG,YAAYA,CAAI,EAE3B,aAAeA,EAGVC,EAAiB,CAACC,EAAW,KAAO,CAChD,MAAMC,EAAqB,OAAOD,GAAY,EAAE,EAAE,KAAI,EACtD,OAAIC,IAAuB,GACnBA,EAED,OAAQ,OAAO,IAAM,OAAO,GAAG,cAAiB,EAAE,CAC1D,EAEaC,EAAaC,GAAU,OAAO,OAAO,GAAM,WAAa,OAAO,EAAEb,EAAQa,CAAI,EAAIA,ECjBxFC,EAA6B,IAC7BC,EAAmB,CAAC,IAAK,IAAK,GAAG,EAsB1BC,EAAuB,MAAOC,EAAKC,EAAO,CAAA,EAAIC,EAAU,CAAA,IAAO,CAC3E,KAAM,CAAE,UAAAC,EAAYN,EAA4B,gBAAAO,EAAkB,iBAAiB,EAAKF,EAClFG,EAAa,IAAI,gBACjBC,EAAYH,IAAc,MAAQA,IAAc,EACnD,KACA,OAAO,WAAW,IAAME,EAAW,MAAK,EAAIF,CAAS,EAClDI,EAAeN,EAAK,OAC1B,IAAIO,EACAD,IACCA,EAAa,QAChBF,EAAW,MAAK,GAEhBG,EAAgB,IAAMH,EAAW,MAAK,EACtCE,EAAa,iBAAiB,QAASC,CAAa,IAGtD,MAAMC,EAAU,OAAO,OAAO,CAAE,OAAQ,kBAAkB,EAAIR,EAAK,SAAW,CAAA,CAAE,EAChF,IAAIS,EAAS,KACb,GAAI,CACH,MAAMC,EAAW,MAAM,MAAMX,EAAK,OAAO,OAAO,CAAA,EAAIC,EAAM,CACzD,YAAa,cACb,QAAAQ,EACA,OAAQJ,EAAW,MACtB,CAAG,CAAC,EACFK,EAASC,EAAS,OAGlB,IAAIC,EAAS,GACb,MAAMC,EAAO,MAAMF,EAAS,KAAI,EAAG,MAAOG,GAAU,CACnD,GAAI,EAAEA,aAAiB,aACtB,MAAMA,EAEP,OAAAF,EAAS,GACF,CAAA,CACR,CAAC,EACD,GAAI,CAACD,EAAS,GAAI,CACjB,MAAMG,EAAQ,IAAI,MAAOD,GAAQA,EAAK,SAAYT,CAAe,EAC7DS,GAAQ,OAAOA,EAAK,MAAS,WAChCC,EAAM,KAAOD,EAAK,MAIfA,GAAQA,EAAK,YAAc,KAC9BC,EAAM,UAAY,IAGnB,MAAMC,EAAYjB,EAAiB,SAASa,EAAS,MAAM,GAAKG,EAAM,YAAc,GACpF,MAAIH,EAAS,QAAU,MAAQ,CAACC,GAAUG,KACzCD,EAAM,WAAa,IAEpBA,EAAM,OAASH,EAAS,OAClBG,CACP,CACA,OAAOD,CACR,OAASC,EAAO,CACf,GAAIA,GAAS,OAAOA,GAAU,UAAY,SAAUA,GAASA,EAAM,OAAS,aAAc,CAKzF,GAAIR,IAAc,MAASC,GAAgBA,EAAa,QACvD,MAAMO,EAEP,MAAME,EAAW,IAAI,MAAM,oBAAoB,EAC/C,MAAAA,EAAS,WAAa,GAClBN,IAAW,OACdM,EAAS,OAASN,GAEbM,CACP,CAGA,MAAIF,aAAiB,YACpBA,EAAM,WAAa,GACfJ,IAAW,OACdI,EAAM,OAASJ,IAGXI,CACP,QAAA,CACKR,IAAc,MACjB,OAAO,aAAaA,CAAS,EAE1BE,GACHD,EAAa,oBAAoB,QAASC,CAAa,CAEzD,CACD,EAQaS,EAAgBH,GAAU,CAAA,CAAQA,GAAUA,EAAM,aAAe,GAYjEI,EAAsB,CAACJ,EAAOK,EAAgBC,IACtDH,EAAaH,CAAK,EACdK,EAEDL,aAAiB,OAASA,EAAM,QAAUA,EAAM,QAAUM"}
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diff --git a/js/fetch-helpers-Dqr3YYFE.chunk.mjs b/js/fetch-helpers-Dqr3YYFE.chunk.mjs
deleted file mode 100644
index 71c7bddd..00000000
--- a/js/fetch-helpers-Dqr3YYFE.chunk.mjs
+++ /dev/null
@@ -1,2 +0,0 @@
-const p="etherpad_nextcloud",h="application/x-etherpad-nextcloud",m="etherpad_nextcloud",b=Object.freeze(["protected","public"]),y="protected",E=e=>b.includes(e),O=e=>window.OC&&typeof window.OC.generateUrl=="function"?window.OC.generateUrl(e):"/index.php"+e,x=(e="")=>{const a=String(e||"").trim();return a!==""?a:String(window.OC&&window.OC.requestToken||"")},C=e=>typeof window.t=="function"?window.t(p,e):e,f=1e4,g=[502,503,504],j=async(e,a={},c={})=>{const{timeoutMs:d=f,fallbackMessage:w="Request failed."}=c,s=new AbortController,l=d===null||d===0?null:window.setTimeout(()=>s.abort(),d),o=a.signal;let i;o&&(o.aborted?s.abort():(i=()=>s.abort(),o.addEventListener("abort",i)));const u=Object.assign({Accept:"application/json"},a.headers||{});try{const t=await fetch(e,Object.assign({},a,{credentials:"same-origin",headers:u,signal:s.signal})),n=await t.json().catch(r=>{if(!(r instanceof SyntaxError))throw r;return{}});if(!t.ok){const r=new Error(n&&n.message||w);throw n&&typeof n.code=="string"&&(r.code=n.code),n&&n.retryable===!0&&(r.retryable=!0),g.includes(t.status)&&r.retryable!==!0&&(r.unanswered=!0),r.status=t.status,r}return n}catch(t){if(t&&typeof t=="object"&&"name"in t&&t.name==="AbortError"){if(l===null||o&&o.aborted)throw t;const n=new Error("Request timed out.");throw n.unanswered=!0,n}throw t instanceof TypeError&&(t.unanswered=!0),t}finally{l!==null&&window.clearTimeout(l),i&&o.removeEventListener("abort",i)}},A=(e,a,c)=>e&&e.unanswered===!0?a:e instanceof Error&&e.message?e.message:c;export{p as A,y as D,h as M,m as V,O as a,j as f,E as i,x as o,A as r,C as t};
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diff --git a/js/fetch-helpers-Dqr3YYFE.chunk.mjs.map b/js/fetch-helpers-Dqr3YYFE.chunk.mjs.map
deleted file mode 100644
index 75252cbf..00000000
--- a/js/fetch-helpers-Dqr3YYFE.chunk.mjs.map
+++ /dev/null
@@ -1 +0,0 @@
-{"version":3,"file":"fetch-helpers-Dqr3YYFE.chunk.mjs","sources":["../src/lib/constants.js","../src/lib/oc-compat.js","../src/lib/fetch-helpers.js"],"sourcesContent":["/**\n * SPDX-License-Identifier: AGPL-3.0-or-later\n * Copyright (c) 2026 Jacob Bühler\n */\n\nexport const APP_ID = 'etherpad_nextcloud'\nexport const MIME = 'application/x-etherpad-nextcloud'\nexport const VIEWER_HANDLER_ID = 'etherpad_nextcloud'\n\n/** The kinds of pad this app makes. PadAccessMode.php is the same list. */\nexport const PAD_ACCESS_MODES = Object.freeze(['protected', 'public'])\n\n/** What a caller gets for asking for none. PadCreateController spells it too. */\nexport const DEFAULT_PAD_ACCESS_MODE = 'protected'\n\n/**\n * @param {unknown} value\n * @return {boolean}\n */\nexport const isPadAccessMode = (value) => PAD_ACCESS_MODES.includes(value)\n","/**\n * SPDX-License-Identifier: AGPL-3.0-or-later\n * Copyright (c) 2026 Jacob Bühler\n */\n\nimport { APP_ID } from './constants.js'\n\nexport const ocGenerateUrl = (path) => {\n\tif (window.OC && typeof window.OC.generateUrl === 'function') {\n\t\treturn window.OC.generateUrl(path)\n\t}\n\treturn '/index.php' + path\n}\n\nexport const ocRequestToken = (fallback = '') => {\n\tconst configuredFallback = String(fallback || '').trim()\n\tif (configuredFallback !== '') {\n\t\treturn configuredFallback\n\t}\n\treturn String((window.OC && window.OC.requestToken) || '')\n}\n\nexport const translate = (text) => (typeof window.t === 'function' ? window.t(APP_ID, text) : text)\n","/**\n * SPDX-License-Identifier: AGPL-3.0-or-later\n * Copyright (c) 2026 Jacob Bühler\n */\n\nconst DEFAULT_REQUEST_TIMEOUT_MS = 10000\nconst GATEWAY_STATUSES = [502, 503, 504]\n\n/**\n * `init.signal` is chained rather than replaced: the timeout needs a\n * controller of its own, and a caller that brought a signal — a viewer\n * abandoning an open, say — must still be able to cancel. Whichever fires\n * first wins.\n *\n * `timeoutMs: null` waits indefinitely, and is for requests that *write*.\n * Cutting a read short costs a retry; cutting a write short applies the\n * change with nobody left to read the outcome — a recovery that has\n * created its pad but not yet its binding looks unrecovered, and the\n * retry then either collides with the binding it did write or provisions\n * a second pad and orphans the first. Slow is not the same as stuck.\n *\n * An error carries the server's `code` and `retryable` when it sent them,\n * and `unanswered` when nothing came back from this app: our own timeout,\n * a failed network, or a gateway answering in its place. Only that fact:\n * whether the same request is worth another try depends on whether it\n * writes, which the caller knows (`isRetryableOpenError` for an open).\n */\nexport const fetchJsonWithTimeout = async (url, init = {}, options = {}) => {\n\tconst { timeoutMs = DEFAULT_REQUEST_TIMEOUT_MS, fallbackMessage = 'Request failed.' } = options\n\tconst controller = new AbortController()\n\tconst timeoutId = timeoutMs === null || timeoutMs === 0\n\t\t? null\n\t\t: window.setTimeout(() => controller.abort(), timeoutMs)\n\tconst callerSignal = init.signal\n\tlet abortOnCaller\n\tif (callerSignal) {\n\t\tif (callerSignal.aborted) {\n\t\t\tcontroller.abort()\n\t\t} else {\n\t\t\tabortOnCaller = () => controller.abort()\n\t\t\tcallerSignal.addEventListener('abort', abortOnCaller)\n\t\t}\n\t}\n\tconst headers = Object.assign({ Accept: 'application/json' }, init.headers || {})\n\ttry {\n\t\tconst response = await fetch(url, Object.assign({}, init, {\n\t\t\tcredentials: 'same-origin',\n\t\t\theaders,\n\t\t\tsignal: controller.signal,\n\t\t}))\n\t\t// Only a body that is not JSON counts as none. 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diff --git a/js/pad-open-flow-D6KDQoVq.chunk.mjs b/js/pad-open-flow-By_FzSKk.chunk.mjs
similarity index 74%
rename from js/pad-open-flow-D6KDQoVq.chunk.mjs
rename to js/pad-open-flow-By_FzSKk.chunk.mjs
index 32bd8448..e1d60699 100644
--- a/js/pad-open-flow-D6KDQoVq.chunk.mjs
+++ b/js/pad-open-flow-By_FzSKk.chunk.mjs
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+++ b/js/pad-open-flow-By_FzSKk.chunk.mjs.map
@@ -1 +1 @@
-{"version":3,"file":"pad-open-flow-D6KDQoVq.chunk.mjs","sources":["../src/lib/pad-sync.js","../src/lib/hand-focus.js","../node_modules/dompurify/dist/purify.es.mjs","../src/lib/sanitize-html.js","../src/lib/pad-content.js","../src/lib/pad-open-flow.js"],"sourcesContent":["/**\n * SPDX-License-Identifier: AGPL-3.0-or-later\n * Copyright (c) 2026 Jacob Bühler\n */\n\n/**\n * Shared pad-sync loop for the viewer and embed entrypoints.\n *\n * Owns the periodic background sync, forced/keepalive flushes, and the\n * visibility/pagehide lifecycle wiring. Forced syncs coalesce: while one\n * request is in flight a second forced flush is not started concurrently but\n * remembered and replayed once, so two forced flushes can never overlap (this\n * is the embed behavior, now shared — the viewer previously used a plain\n * in-flight boolean that allowed overlap).\n *\n * The caller supplies the request-token getter (the viewer and embed read it\n * from different places) and may inject a `fetchImpl` for tests.\n */\n\nexport const DEFAULT_SYNC_INTERVAL_MS = 120000\n\nexport function createPadSync({ requestToken, fetchImpl } = {}) {\n\tconst doFetch = typeof fetchImpl === 'function' ? fetchImpl : (...args) => window.fetch(...args)\n\tconst getToken = typeof requestToken === 'function' ? requestToken : () => ''\n\n\tlet syncUrl = ''\n\tlet intervalMs = DEFAULT_SYNC_INTERVAL_MS\n\tlet syncPromise = null\n\tlet activeSyncForce = false\n\tlet pendingForcedSync = false\n\tlet pendingForcedKeepalive = false\n\tlet timerId = null\n\tlet visibilityHandler = null\n\tlet pageHideHandler = null\n\n\tconst configure = ({ syncUrl: url, intervalMs: ms } = {}) => {\n\t\tif (typeof url === 'string') {\n\t\t\tsyncUrl = url\n\t\t}\n\t\tif (Number.isFinite(ms) && ms > 0) {\n\t\t\tintervalMs = ms\n\t\t}\n\t}\n\n\tconst stop = () => {\n\t\tif (timerId !== null) {\n\t\t\twindow.clearInterval(timerId)\n\t\t\ttimerId = null\n\t\t}\n\t}\n\n\tconst start = () => {\n\t\tif (!syncUrl || timerId !== null) {\n\t\t\treturn\n\t\t}\n\t\ttimerId = window.setInterval(() => {\n\t\t\tif (document.visibilityState === 'visible') {\n\t\t\t\tfireAndForget(false, false)\n\t\t\t}\n\t\t}, intervalMs)\n\t}\n\n\tconst fireAndForget = (force, keepalive) => {\n\t\tvoid sync(force, keepalive).catch(() => {})\n\t}\n\n\tconst sync = async (force, keepalive) => {\n\t\tif (!syncUrl) {\n\t\t\treturn { status: 'disabled' }\n\t\t}\n\t\tif (syncPromise) {\n\t\t\t// A request is already running. A forced flush that arrives while a\n\t\t\t// non-forced sync is in flight is coalesced into a single replay.\n\t\t\tif (force && !activeSyncForce) {\n\t\t\t\tpendingForcedSync = true\n\t\t\t\tpendingForcedKeepalive = pendingForcedKeepalive || Boolean(keepalive)\n\t\t\t\treturn syncPromise.catch(() => undefined).then(() => sync(true, pendingForcedKeepalive))\n\t\t\t}\n\t\t\treturn syncPromise\n\t\t}\n\t\tactiveSyncForce = Boolean(force)\n\t\tconst currentPromise = (async () => {\n\t\t\tconst url = force ? (syncUrl + (syncUrl.includes('?') ? '&' : '?') + 'force=1') : syncUrl\n\t\t\tconst response = await doFetch(url, {\n\t\t\t\tmethod: 'POST',\n\t\t\t\tcredentials: 'same-origin',\n\t\t\t\theaders: {\n\t\t\t\t\tAccept: 'application/json',\n\t\t\t\t\trequesttoken: getToken(),\n\t\t\t\t},\n\t\t\t\tkeepalive: Boolean(keepalive),\n\t\t\t})\n\t\t\tconst data = await response.json().catch(() => ({}))\n\t\t\tif (!response.ok) {\n\t\t\t\tthrow new Error((data && data.message) || 'Sync request failed.')\n\t\t\t}\n\t\t\treturn data\n\t\t})()\n\t\tsyncPromise = currentPromise\n\t\tlet result\n\t\tlet syncError = null\n\t\ttry {\n\t\t\tresult = await currentPromise\n\t\t} catch (error) {\n\t\t\tsyncError = error\n\t\t} finally {\n\t\t\tif (syncPromise === currentPromise) {\n\t\t\t\tsyncPromise = null\n\t\t\t}\n\t\t\tactiveSyncForce = false\n\t\t}\n\t\tconst rerunForcedSync = pendingForcedSync\n\t\tconst rerunKeepalive = pendingForcedKeepalive\n\t\tpendingForcedSync = false\n\t\tpendingForcedKeepalive = false\n\t\tif (rerunForcedSync) {\n\t\t\treturn sync(true, rerunKeepalive)\n\t\t}\n\t\tif (syncError instanceof Error) {\n\t\t\tthrow syncError\n\t\t}\n\t\treturn result\n\t}\n\n\tconst installLifecycleHandlers = () => {\n\t\tif (visibilityHandler || pageHideHandler) {\n\t\t\treturn\n\t\t}\n\t\tvisibilityHandler = () => {\n\t\t\tif (document.visibilityState === 'hidden') {\n\t\t\t\tfireAndForget(true, true)\n\t\t\t\tstop()\n\t\t\t\treturn\n\t\t\t}\n\t\t\tstart()\n\t\t}\n\t\tpageHideHandler = () => {\n\t\t\tfireAndForget(true, true)\n\t\t\tstop()\n\t\t}\n\t\tdocument.addEventListener('visibilitychange', visibilityHandler)\n\t\twindow.addEventListener('pagehide', pageHideHandler)\n\t}\n\n\tconst removeLifecycleHandlers = () => {\n\t\tif (visibilityHandler) {\n\t\t\tdocument.removeEventListener('visibilitychange', visibilityHandler)\n\t\t\tvisibilityHandler = null\n\t\t}\n\t\tif (pageHideHandler) {\n\t\t\twindow.removeEventListener('pagehide', pageHideHandler)\n\t\t\tpageHideHandler = null\n\t\t}\n\t}\n\n\treturn {\n\t\tconfigure,\n\t\tstart,\n\t\tstop,\n\t\tsync,\n\t\tfireAndForget,\n\t\tinstallLifecycleHandlers,\n\t\tremoveLifecycleHandlers,\n\t}\n}\n","/**\n * SPDX-License-Identifier: AGPL-3.0-or-later\n * Copyright (c) 2026 Jacob Bühler\n */\n\n/**\n * After a click whose button went away with the focus on it - a second\n * try, a recovery - the first action in `actionsScope`, or else the\n * message, takes the focus, so a keyboard or screen reader keeps its\n * place (docs/architecture.md, \"Errors of the API\").\n *\n * @param {Element|null|undefined} actionsScope where the new actions are\n * @param {Element|null|undefined} messageNode what to focus without one\n * @param {{preventScroll?: boolean}} [options] the embed page sits in\n *   another page, which must not scroll to it\n */\nexport const handFocusTo = (actionsScope, messageNode, { preventScroll = false } = {}) => {\n\tconst action = actionsScope instanceof HTMLElement ? actionsScope.querySelector('a, button') : null\n\tconst target = action || messageNode\n\tif (!(target instanceof HTMLElement)) {\n\t\treturn\n\t}\n\tif (target === messageNode) {\n\t\t// A paragraph takes the focus only with a tabindex.\n\t\ttarget.tabIndex = -1\n\t}\n\ttarget.focus({ preventScroll })\n}\n","/*! @license DOMPurify 3.4.15 | (c) Cure53 and other contributors | Released under the Apache license 2.0 and Mozilla Public License 2.0 | github.com/cure53/DOMPurify/blob/3.4.15/LICENSE */\n\nfunction _arrayLikeToArray(r, a) {\n  (null == a || a > r.length) && (a = r.length);\n  for (var e = 0, n = Array(a); e < a; e++) n[e] = r[e];\n  return n;\n}\nfunction _arrayWithHoles(r) {\n  if (Array.isArray(r)) return r;\n}\nfunction _iterableToArrayLimit(r, l) {\n  var t = null == r ? null : \"undefined\" != typeof Symbol && r[Symbol.iterator] || r[\"@@iterator\"];\n  if (null != t) {\n    var e,\n      n,\n      i,\n      u,\n      a = [],\n      f = true,\n      o = false;\n    try {\n      if (i = (t = t.call(r)).next, 0 === l) ; else for (; !(f = (e = i.call(t)).done) && (a.push(e.value), a.length !== l); f = !0);\n    } catch (r) {\n      o = true, n = r;\n    } finally {\n      try {\n        if (!f && null != t.return && (u = t.return(), Object(u) !== u)) return;\n      } finally {\n        if (o) throw n;\n      }\n    }\n    return a;\n  }\n}\nfunction _nonIterableRest() {\n  throw new TypeError(\"Invalid attempt to destructure non-iterable instance.\\nIn order to be iterable, non-array objects must have a [Symbol.iterator]() method.\");\n}\nfunction _slicedToArray(r, e) {\n  return _arrayWithHoles(r) || _iterableToArrayLimit(r, e) || _unsupportedIterableToArray(r, e) || _nonIterableRest();\n}\nfunction _unsupportedIterableToArray(r, a) {\n  if (r) {\n    if (\"string\" == typeof r) return _arrayLikeToArray(r, a);\n    var t = {}.toString.call(r).slice(8, -1);\n    return \"Object\" === t && r.constructor && (t = r.constructor.name), \"Map\" === t || \"Set\" === t ? Array.from(r) : \"Arguments\" === t || /^(?:Ui|I)nt(?:8|16|32)(?:Clamped)?Array$/.test(t) ? _arrayLikeToArray(r, a) : void 0;\n  }\n}\n\nconst entries = Object.entries,\n  setPrototypeOf = Object.setPrototypeOf,\n  isFrozen = Object.isFrozen,\n  getPrototypeOf = Object.getPrototypeOf,\n  getOwnPropertyDescriptor = Object.getOwnPropertyDescriptor;\nlet freeze = Object.freeze,\n  seal = Object.seal,\n  create = Object.create; // eslint-disable-line import/no-mutable-exports\nlet _ref = typeof Reflect !== 'undefined' && Reflect,\n  apply = _ref.apply,\n  construct = _ref.construct;\nif (!freeze) {\n  freeze = function freeze(x) {\n    return x;\n  };\n}\nif (!seal) {\n  seal = function seal(x) {\n    return x;\n  };\n}\nif (!apply) {\n  apply = function apply(func, thisArg) {\n    for (var _len = arguments.length, args = new Array(_len > 2 ? _len - 2 : 0), _key = 2; _key < _len; _key++) {\n      args[_key - 2] = arguments[_key];\n    }\n    return func.apply(thisArg, args);\n  };\n}\nif (!construct) {\n  construct = function construct(Func) {\n    for (var _len2 = arguments.length, args = new Array(_len2 > 1 ? _len2 - 1 : 0), _key2 = 1; _key2 < _len2; _key2++) {\n      args[_key2 - 1] = arguments[_key2];\n    }\n    return new Func(...args);\n  };\n}\nconst arrayForEach = unapply(Array.prototype.forEach);\nconst arrayLastIndexOf = unapply(Array.prototype.lastIndexOf);\nconst arrayPop = unapply(Array.prototype.pop);\nconst arrayPush = unapply(Array.prototype.push);\nconst arraySplice = unapply(Array.prototype.splice);\nconst arrayIsArray = Array.isArray;\nconst stringToLowerCase = unapply(String.prototype.toLowerCase);\nconst stringToString = unapply(String.prototype.toString);\nconst stringMatch = unapply(String.prototype.match);\nconst stringReplace = unapply(String.prototype.replace);\nconst stringIndexOf = unapply(String.prototype.indexOf);\nconst stringTrim = unapply(String.prototype.trim);\nconst numberToString = unapply(Number.prototype.toString);\nconst booleanToString = unapply(Boolean.prototype.toString);\nconst bigintToString = typeof BigInt === 'undefined' ? null : unapply(BigInt.prototype.toString);\nconst symbolToString = typeof Symbol === 'undefined' ? null : unapply(Symbol.prototype.toString);\nconst objectHasOwnProperty = unapply(Object.prototype.hasOwnProperty);\nconst objectToString = unapply(Object.prototype.toString);\nconst regExpTest = unapply(RegExp.prototype.test);\nconst typeErrorCreate = unconstruct(TypeError);\n/**\n * Creates a new function that calls the given function with a specified thisArg and arguments.\n *\n * @param func - The function to be wrapped and called.\n * @returns A new function that calls the given function with a specified thisArg and arguments.\n */\nfunction unapply(func) {\n  return function (thisArg) {\n    if (thisArg instanceof RegExp) {\n      thisArg.lastIndex = 0;\n    }\n    for (var _len3 = arguments.length, args = new Array(_len3 > 1 ? _len3 - 1 : 0), _key3 = 1; _key3 < _len3; _key3++) {\n      args[_key3 - 1] = arguments[_key3];\n    }\n    return apply(func, thisArg, args);\n  };\n}\n/**\n * Creates a new function that constructs an instance of the given constructor function with the provided arguments.\n *\n * @param func - The constructor function to be wrapped and called.\n * @returns A new function that constructs an instance of the given constructor function with the provided arguments.\n */\nfunction unconstruct(Func) {\n  return function () {\n    for (var _len4 = arguments.length, args = new Array(_len4), _key4 = 0; _key4 < _len4; _key4++) {\n      args[_key4] = arguments[_key4];\n    }\n    return construct(Func, args);\n  };\n}\n/**\n * Add properties to a lookup table\n *\n * @param set - The set to which elements will be added.\n * @param array - The array containing elements to be added to the set.\n * @param transformCaseFunc - An optional function to transform the case of each element before adding to the set.\n * @returns The modified set with added elements.\n */\nfunction addToSet(set, array) {\n  let transformCaseFunc = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : stringToLowerCase;\n  if (setPrototypeOf) {\n    // Make 'in' and truthy checks like Boolean(set.constructor)\n    // independent of any properties defined on Object.prototype.\n    // Prevent prototype setters from intercepting set as a this value.\n    setPrototypeOf(set, null);\n  }\n  if (!arrayIsArray(array)) {\n    return set;\n  }\n  let l = array.length;\n  while (l--) {\n    let element = array[l];\n    if (typeof element === 'string') {\n      const lcElement = transformCaseFunc(element);\n      if (lcElement !== element) {\n        // Config presets (e.g. tags.js, attrs.js) are immutable.\n        if (!isFrozen(array)) {\n          array[l] = lcElement;\n        }\n        element = lcElement;\n      }\n    }\n    set[element] = true;\n  }\n  return set;\n}\n/**\n * Clean up an array to harden against CSPP\n *\n * @param array - The array to be cleaned.\n * @returns The cleaned version of the array\n */\nfunction cleanArray(array) {\n  for (let index = 0; index < array.length; index++) {\n    const isPropertyExist = objectHasOwnProperty(array, index);\n    if (!isPropertyExist) {\n      array[index] = null;\n    }\n  }\n  return array;\n}\n/**\n * Shallow clone an object\n *\n * @param object - The object to be cloned.\n * @returns A new object that copies the original.\n */\nfunction clone(object) {\n  const newObject = create(null);\n  for (const _ref2 of entries(object)) {\n    var _ref3 = _slicedToArray(_ref2, 2);\n    const property = _ref3[0];\n    const value = _ref3[1];\n    const isPropertyExist = objectHasOwnProperty(object, property);\n    if (isPropertyExist) {\n      if (arrayIsArray(value)) {\n        newObject[property] = cleanArray(value);\n      } else if (value && typeof value === 'object' && value.constructor === Object) {\n        newObject[property] = clone(value);\n      } else {\n        newObject[property] = value;\n      }\n    }\n  }\n  return newObject;\n}\n/**\n * Convert non-node values into strings without depending on direct property access.\n *\n * @param value - The value to stringify.\n * @returns A string representation of the provided value.\n */\nfunction stringifyValue(value) {\n  switch (typeof value) {\n    case 'string':\n      {\n        return value;\n      }\n    case 'number':\n      {\n        return numberToString(value);\n      }\n    case 'boolean':\n      {\n        return booleanToString(value);\n      }\n    case 'bigint':\n      {\n        return bigintToString ? bigintToString(value) : '0';\n      }\n    case 'symbol':\n      {\n        return symbolToString ? symbolToString(value) : 'Symbol()';\n      }\n    case 'undefined':\n      {\n        return objectToString(value);\n      }\n    case 'function':\n    case 'object':\n      {\n        if (value === null) {\n          return objectToString(value);\n        }\n        const valueAsRecord = value;\n        const valueToString = lookupGetter(valueAsRecord, 'toString');\n        if (typeof valueToString === 'function') {\n          const stringified = valueToString(valueAsRecord);\n          return typeof stringified === 'string' ? stringified : objectToString(stringified);\n        }\n        return objectToString(value);\n      }\n    default:\n      {\n        return objectToString(value);\n      }\n  }\n}\n/**\n * This method automatically checks if the prop is function or getter and behaves accordingly.\n *\n * @param object - The object to look up the getter function in its prototype chain.\n * @param prop - The property name for which to find the getter function.\n * @returns The getter function found in the prototype chain or a fallback function.\n */\nfunction lookupGetter(object, prop) {\n  while (object !== null) {\n    const desc = getOwnPropertyDescriptor(object, prop);\n    if (desc) {\n      if (desc.get) {\n        return unapply(desc.get);\n      }\n      if (typeof desc.value === 'function') {\n        return unapply(desc.value);\n      }\n    }\n    object = getPrototypeOf(object);\n  }\n  function fallbackValue() {\n    return null;\n  }\n  return fallbackValue;\n}\nfunction isRegex(value) {\n  try {\n    regExpTest(value, '');\n    return true;\n  } catch (_unused) {\n    return false;\n  }\n}\n\nconst html$1 = freeze(['a', 'abbr', 'acronym', 'address', 'area', 'article', 'aside', 'audio', 'b', 'bdi', 'bdo', 'big', 'blink', 'blockquote', 'body', 'br', 'button', 'canvas', 'caption', 'center', 'cite', 'code', 'col', 'colgroup', 'content', 'data', 'datalist', 'dd', 'decorator', 'del', 'details', 'dfn', 'dialog', 'dir', 'div', 'dl', 'dt', 'element', 'em', 'fieldset', 'figcaption', 'figure', 'font', 'footer', 'form', 'h1', 'h2', 'h3', 'h4', 'h5', 'h6', 'head', 'header', 'hgroup', 'hr', 'html', 'i', 'img', 'input', 'ins', 'kbd', 'label', 'legend', 'li', 'main', 'map', 'mark', 'marquee', 'menu', 'menuitem', 'meter', 'nav', 'nobr', 'ol', 'optgroup', 'option', 'output', 'p', 'picture', 'pre', 'progress', 'q', 'rp', 'rt', 'ruby', 's', 'samp', 'search', 'section', 'select', 'shadow', 'slot', 'small', 'source', 'spacer', 'span', 'strike', 'strong', 'style', 'sub', 'summary', 'sup', 'table', 'tbody', 'td', 'template', 'textarea', 'tfoot', 'th', 'thead', 'time', 'tr', 'track', 'tt', 'u', 'ul', 'var', 'video', 'wbr']);\nconst svg$1 = freeze(['svg', 'a', 'altglyph', 'altglyphdef', 'altglyphitem', 'animatecolor', 'animatemotion', 'animatetransform', 'circle', 'clippath', 'defs', 'desc', 'ellipse', 'enterkeyhint', 'exportparts', 'filter', 'font', 'g', 'glyph', 'glyphref', 'hkern', 'image', 'inputmode', 'line', 'lineargradient', 'marker', 'mask', 'metadata', 'mpath', 'part', 'path', 'pattern', 'polygon', 'polyline', 'radialgradient', 'rect', 'stop', 'style', 'switch', 'symbol', 'text', 'textpath', 'title', 'tref', 'tspan', 'view', 'vkern']);\nconst svgFilters = freeze(['feBlend', 'feColorMatrix', 'feComponentTransfer', 'feComposite', 'feConvolveMatrix', 'feDiffuseLighting', 'feDisplacementMap', 'feDistantLight', 'feDropShadow', 'feFlood', 'feFuncA', 'feFuncB', 'feFuncG', 'feFuncR', 'feGaussianBlur', 'feImage', 'feMerge', 'feMergeNode', 'feMorphology', 'feOffset', 'fePointLight', 'feSpecularLighting', 'feSpotLight', 'feTile', 'feTurbulence']);\n// List of SVG elements that are disallowed by default.\n// We still need to know them so that we can do namespace\n// checks properly in case one wants to add them to\n// allow-list.\nconst svgDisallowed = freeze(['animate', 'color-profile', 'cursor', 'discard', 'font-face', 'font-face-format', 'font-face-name', 'font-face-src', 'font-face-uri', 'foreignobject', 'hatch', 'hatchpath', 'mesh', 'meshgradient', 'meshpatch', 'meshrow', 'missing-glyph', 'script', 'set', 'solidcolor', 'unknown', 'use']);\nconst mathMl$1 = freeze(['math', 'menclose', 'merror', 'mfenced', 'mfrac', 'mglyph', 'mi', 'mlabeledtr', 'mmultiscripts', 'mn', 'mo', 'mover', 'mpadded', 'mphantom', 'mroot', 'mrow', 'ms', 'mspace', 'msqrt', 'mstyle', 'msub', 'msup', 'msubsup', 'mtable', 'mtd', 'mtext', 'mtr', 'munder', 'munderover', 'mprescripts']);\n// Similarly to SVG, we want to know all MathML elements,\n// even those that we disallow by default.\nconst mathMlDisallowed = freeze(['maction', 'maligngroup', 'malignmark', 'mlongdiv', 'mscarries', 'mscarry', 'msgroup', 'mstack', 'msline', 'msrow', 'semantics', 'annotation', 'annotation-xml', 'mprescripts', 'none']);\nconst text = freeze(['#text']);\n\nconst html = freeze(['accept', 'action', 'align', 'alt', 'autocapitalize', 'autocomplete', 'autopictureinpicture', 'autoplay', 'background', 'bgcolor', 'border', 'capture', 'cellpadding', 'cellspacing', 'checked', 'cite', 'class', 'clear', 'color', 'cols', 'colspan', 'command', 'commandfor', 'controls', 'controlslist', 'coords', 'crossorigin', 'datetime', 'decoding', 'default', 'dir', 'disabled', 'disablepictureinpicture', 'disableremoteplayback', 'download', 'draggable', 'enctype', 'enterkeyhint', 'exportparts', 'face', 'for', 'headers', 'height', 'hidden', 'high', 'href', 'hreflang', 'id', 'inert', 'inputmode', 'integrity', 'ismap', 'kind', 'label', 'lang', 'list', 'loading', 'loop', 'low', 'max', 'maxlength', 'media', 'method', 'min', 'minlength', 'multiple', 'muted', 'name', 'nonce', 'noshade', 'novalidate', 'nowrap', 'open', 'optimum', 'part', 'pattern', 'placeholder', 'playsinline', 'popover', 'popovertarget', 'popovertargetaction', 'poster', 'preload', 'pubdate', 'radiogroup', 'readonly', 'rel', 'required', 'rev', 'reversed', 'role', 'rows', 'rowspan', 'spellcheck', 'scope', 'selected', 'shape', 'size', 'sizes', 'slot', 'span', 'srclang', 'start', 'src', 'srcset', 'step', 'style', 'summary', 'tabindex', 'title', 'translate', 'type', 'usemap', 'valign', 'value', 'width', 'wrap', 'xmlns']);\nconst svg = freeze(['accent-height', 'accumulate', 'additive', 'alignment-baseline', 'amplitude', 'ascent', 'attributename', 'attributetype', 'azimuth', 'basefrequency', 'baseline-shift', 'begin', 'bias', 'by', 'class', 'clip', 'clippathunits', 'clip-path', 'clip-rule', 'color', 'color-interpolation', 'color-interpolation-filters', 'color-profile', 'color-rendering', 'cx', 'cy', 'd', 'dx', 'dy', 'diffuseconstant', 'direction', 'display', 'divisor', 'dominant-baseline', 'dur', 'edgemode', 'elevation', 'end', 'exponent', 'fill', 'fill-opacity', 'fill-rule', 'filter', 'filterunits', 'flood-color', 'flood-opacity', 'font-family', 'font-size', 'font-size-adjust', 'font-stretch', 'font-style', 'font-variant', 'font-weight', 'fx', 'fy', 'g1', 'g2', 'glyph-name', 'glyphref', 'gradientunits', 'gradienttransform', 'height', 'href', 'id', 'image-rendering', 'in', 'in2', 'intercept', 'k', 'k1', 'k2', 'k3', 'k4', 'kerning', 'keypoints', 'keysplines', 'keytimes', 'lang', 'lengthadjust', 'letter-spacing', 'kernelmatrix', 'kernelunitlength', 'lighting-color', 'local', 'marker-end', 'marker-mid', 'marker-start', 'markerheight', 'markerunits', 'markerwidth', 'maskcontentunits', 'maskunits', 'max', 'mask', 'mask-type', 'media', 'method', 'mode', 'min', 'name', 'numoctaves', 'offset', 'operator', 'opacity', 'order', 'orient', 'orientation', 'origin', 'overflow', 'paint-order', 'path', 'pathlength', 'patterncontentunits', 'patterntransform', 'patternunits', 'pointer-events', 'points', 'preservealpha', 'preserveaspectratio', 'primitiveunits', 'r', 'rx', 'ry', 'radius', 'refx', 'refy', 'repeatcount', 'repeatdur', 'restart', 'result', 'rotate', 'scale', 'seed', 'shape-rendering', 'slope', 'specularconstant', 'specularexponent', 'spreadmethod', 'startoffset', 'stddeviation', 'stitchtiles', 'stop-color', 'stop-opacity', 'stroke-dasharray', 'stroke-dashoffset', 'stroke-linecap', 'stroke-linejoin', 'stroke-miterlimit', 'stroke-opacity', 'stroke', 'stroke-width', 'style', 'surfacescale', 'systemlanguage', 'tabindex', 'tablevalues', 'targetx', 'targety', 'transform', 'transform-origin', 'text-anchor', 'text-decoration', 'text-orientation', 'text-rendering', 'textlength', 'type', 'u1', 'u2', 'unicode', 'values', 'vector-effect', 'viewbox', 'visibility', 'version', 'vert-adv-y', 'vert-origin-x', 'vert-origin-y', 'width', 'word-spacing', 'wrap', 'writing-mode', 'xchannelselector', 'ychannelselector', 'x', 'x1', 'x2', 'xmlns', 'y', 'y1', 'y2', 'z', 'zoomandpan']);\nconst mathMl = freeze(['accent', 'accentunder', 'align', 'bevelled', 'close', 'columnalign', 'columnlines', 'columnspacing', 'columnspan', 'denomalign', 'depth', 'dir', 'display', 'displaystyle', 'encoding', 'fence', 'frame', 'height', 'href', 'id', 'largeop', 'length', 'linethickness', 'lquote', 'lspace', 'mathbackground', 'mathcolor', 'mathsize', 'mathvariant', 'maxsize', 'minsize', 'movablelimits', 'notation', 'numalign', 'open', 'rowalign', 'rowlines', 'rowspacing', 'rowspan', 'rspace', 'rquote', 'scriptlevel', 'scriptminsize', 'scriptsizemultiplier', 'selection', 'separator', 'separators', 'stretchy', 'subscriptshift', 'supscriptshift', 'symmetric', 'voffset', 'width', 'xmlns']);\nconst xml = freeze(['xlink:href', 'xml:id', 'xlink:title', 'xml:space', 'xmlns:xlink']);\n\nconst MUSTACHE_EXPR = seal(/{{[\\w\\W]*|^[\\w\\W]*}}/g);\nconst ERB_EXPR = seal(/<%[\\w\\W]*|^[\\w\\W]*%>/g);\nconst TMPLIT_EXPR = seal(/\\${[\\w\\W]*/g);\nconst DATA_ATTR = seal(/^data-[\\-\\w.\\u00B7-\\uFFFF]+$/); // eslint-disable-line no-useless-escape\nconst ARIA_ATTR = seal(/^aria-[\\-\\w]+$/); // eslint-disable-line no-useless-escape\nconst IS_ALLOWED_URI = seal(/^(?:(?:(?:f|ht)tps?|mailto|tel|callto|sms|cid|xmpp|matrix):|[^a-z]|[a-z+.\\-]+(?:[^a-z+.\\-:]|$))/i // eslint-disable-line no-useless-escape\n);\nconst IS_SCRIPT_OR_DATA = seal(/^(?:\\w+script|data):/i);\nconst ATTR_WHITESPACE = seal(/[\\u0000-\\u0020\\u00A0\\u1680\\u180E\\u2000-\\u2029\\u205F\\u3000]/g // eslint-disable-line no-control-regex\n);\nconst DOCTYPE_NAME = seal(/^html$/i);\nconst CUSTOM_ELEMENT = seal(/^[a-z][.\\w]*(-[.\\w]+)+$/i);\n// Markup-significant character probes used by _sanitizeElements.\n// Shared module-level instances are safe despite the sticky /g flags:\n// unapply() resets lastIndex for RegExp receivers before every call.\nconst ELEMENT_MARKUP_PROBE = seal(/<[/\\w!]/g);\nconst COMMENT_MARKUP_PROBE = seal(/<[/\\w]/g);\nconst FALLBACK_TAG_CLOSE = seal(/<\\/no(script|embed|frames)/i);\nconst SELF_CLOSING_TAG = seal(/\\/>/i);\n\n// https://developer.mozilla.org/en-US/docs/Web/API/Node/nodeType\nconst NODE_TYPE = {\n  element: 1,\n  attribute: 2,\n  text: 3,\n  cdataSection: 4,\n  entityReference: 5,\n  // Deprecated\n  entityNode: 6,\n  // Deprecated\n  processingInstruction: 7,\n  comment: 8,\n  document: 9,\n  documentType: 10,\n  documentFragment: 11,\n  notation: 12 // Deprecated\n};\n/* HTML-namespace elements whose child text nodes are serialized *literally*\n   (unescaped) by the HTML fragment-serialization algorithm. Two reparse-mXSS\n   shapes ride on that literal serialization:\n     (a) an element child - a tree the HTML parser can never build, but the DOM\n         API and an XML/XHTML parse can - after which a `</tag>`-bearing text\n         sibling breaks the element open on reparse; and\n     (b) text-only content that already carries the element's OWN end tag, e.g.\n         `<style>...</style><img onerror=x>` built as a node, which the literal\n         serializer emits verbatim for the HTML parser to re-open.\n   Shape (a) is handled by the firstElementChild branch in _isUnsafeNode; shape\n   (b) by the LITERAL_TEXT_CLOSE probe. Both read textContent (the raw-serialized\n   form for these elements) rather than innerHTML, because an XML/XHTML working\n   document serializes innerHTML with `<` escaped, which silently blinds the\n   innerHTML-based probes (rule 1's second probe and FALLBACK_TAG_CLOSE) there.\n   `script` is never allow-listed, but is kept here so the guard matches the\n   serializer's own literal-text list exactly. */\nconst LITERAL_TEXT_ELEMENT_NAMES = ['style', 'script', 'xmp', 'iframe', 'noembed', 'noframes', 'plaintext', 'noscript'];\nconst LITERAL_TEXT_ELEMENTS = freeze(addToSet({}, LITERAL_TEXT_ELEMENT_NAMES));\n/* Per-element end-tag matcher. On an HTML reparse the ONLY token that\n   terminates a literal-text element's raw content is its own end tag; a foreign\n   literal-text close (e.g. `</xmp>` sitting inside `<style>`) does not break\n   out, so matching is per-element, not a shared alternation. The lookahead\n   requires an HTML tag-name terminator (whitespace, `/` or `>`) so a longer\n   name such as `</styles` is not mistaken for `</style`. */\nconst LITERAL_TEXT_CLOSE = function () {\n  const map = {};\n  arrayForEach(LITERAL_TEXT_ELEMENT_NAMES, name => {\n    map[name] = seal(new RegExp('</' + name + '(?=[\\\\t\\\\n\\\\f\\\\r />])', 'i'));\n  });\n  return freeze(map);\n}();\nconst getGlobal = function getGlobal() {\n  return typeof window === 'undefined' ? null : window;\n};\n/**\n * Creates a no-op policy for internal use only.\n * Don't export this function outside this module!\n * @param trustedTypes The policy factory.\n * @param purifyHostElement The Script element used to load DOMPurify (to determine policy name suffix).\n * @return The policy created (or null, if Trusted Types\n * are not supported or creating the policy failed).\n */\nconst _createTrustedTypesPolicy = function _createTrustedTypesPolicy(trustedTypes, purifyHostElement) {\n  if (typeof trustedTypes !== 'object' || typeof trustedTypes.createPolicy !== 'function') {\n    return null;\n  }\n  // Allow the callers to control the unique policy name\n  // by adding a data-tt-policy-suffix to the script element with the DOMPurify.\n  // Policy creation with duplicate names throws in Trusted Types.\n  let suffix = null;\n  const ATTR_NAME = 'data-tt-policy-suffix';\n  if (purifyHostElement && purifyHostElement.hasAttribute(ATTR_NAME)) {\n    suffix = purifyHostElement.getAttribute(ATTR_NAME);\n  }\n  const policyName = 'dompurify' + (suffix ? '#' + suffix : '');\n  try {\n    return trustedTypes.createPolicy(policyName, {\n      createHTML(html) {\n        return html;\n      },\n      createScriptURL(scriptUrl) {\n        return scriptUrl;\n      }\n    });\n  } catch (_) {\n    // Policy creation failed (most likely another DOMPurify script has\n    // already run). Skip creating the policy, as this will only cause errors\n    // if TT are enforced.\n    console.warn('TrustedTypes policy ' + policyName + ' could not be created.');\n    return null;\n  }\n};\nconst _createHooksMap = function _createHooksMap() {\n  return {\n    afterSanitizeAttributes: [],\n    afterSanitizeElements: [],\n    afterSanitizeShadowDOM: [],\n    beforeSanitizeAttributes: [],\n    beforeSanitizeElements: [],\n    beforeSanitizeShadowDOM: [],\n    uponSanitizeAttribute: [],\n    uponSanitizeElement: [],\n    uponSanitizeShadowNode: []\n  };\n};\n/**\n * Resolve a set-valued configuration option: a fresh set built from\n * cfg[key] when it is an own array property (seeded with a clone of\n * options.base when given, case-normalized via options.transform),\n * the fallback set otherwise.\n *\n * @param cfg the cloned, prototype-free configuration object\n * @param key the configuration property to read\n * @param fallback the set to use when the option is absent or not an array\n * @param options transform and optional base set to merge into\n * @returns the resolved set\n */\nconst _resolveSetOption = function _resolveSetOption(cfg, key, fallback, options) {\n  return objectHasOwnProperty(cfg, key) && arrayIsArray(cfg[key]) ? addToSet(options.base ? clone(options.base) : {}, cfg[key], options.transform) : fallback;\n};\n/**\n * Resolve an object-valued configuration option: a prototype-free clone\n * of cfg[key] when it is an own, truthy object property, else a fresh\n * fallback built by makeFallback (fresh on every parse, so a previous\n * parse can never leak state into the next one).\n *\n * @param cfg the cloned, prototype-free configuration object\n * @param key the configuration property to read\n * @param makeFallback builds the fallback value when the option is absent\n * @returns the resolved object\n */\nconst _resolveObjectOption = function _resolveObjectOption(cfg, key, makeFallback) {\n  const value = objectHasOwnProperty(cfg, key) ? cfg[key] : undefined;\n  return value && typeof value === 'object' ? clone(value) : makeFallback();\n};\nfunction createDOMPurify() {\n  let window = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : getGlobal();\n  const DOMPurify = root => createDOMPurify(root);\n  DOMPurify.version = '3.4.15';\n  DOMPurify.removed = [];\n  if (!window || !window.document || window.document.nodeType !== NODE_TYPE.document || !window.Element) {\n    // Not running in a browser, provide a factory function\n    // so that you can pass your own Window\n    DOMPurify.isSupported = false;\n    return DOMPurify;\n  }\n  let document = window.document;\n  const originalDocument = document;\n  const currentScript = originalDocument.currentScript;\n  window.DocumentFragment;\n    const HTMLTemplateElement = window.HTMLTemplateElement,\n    Node = window.Node,\n    Element = window.Element,\n    NodeFilter = window.NodeFilter,\n    _window$NamedNodeMap = window.NamedNodeMap;\n    _window$NamedNodeMap === void 0 ? window.NamedNodeMap || window.MozNamedAttrMap : _window$NamedNodeMap;\n    window.HTMLFormElement;\n    const DOMParser = window.DOMParser,\n    trustedTypes = window.trustedTypes;\n  const ElementPrototype = Element.prototype;\n  const cloneNode = lookupGetter(ElementPrototype, 'cloneNode');\n  const remove = lookupGetter(ElementPrototype, 'remove');\n  // Clobber-safe Attr-node removal. On an HTMLFormElement a descendant named\n  // \"removeAttributeNode\" shadows the prototype method via\n  // [LegacyOverrideBuiltIns], so element.removeAttributeNode(attr) throws.\n  // Calling the cached Element.prototype method with the element as the\n  // receiver removes the exact live Attr node regardless of the shadowing.\n  const removeAttributeNode = lookupGetter(ElementPrototype, 'removeAttributeNode');\n  const getNextSibling = lookupGetter(ElementPrototype, 'nextSibling');\n  const getChildNodes = lookupGetter(ElementPrototype, 'childNodes');\n  const getParentNode = lookupGetter(ElementPrototype, 'parentNode');\n  const getShadowRoot = lookupGetter(ElementPrototype, 'shadowRoot');\n  const getAttributes = lookupGetter(ElementPrototype, 'attributes');\n  const getNodeType = Node && Node.prototype ? lookupGetter(Node.prototype, 'nodeType') : null;\n  const getNodeName = Node && Node.prototype ? lookupGetter(Node.prototype, 'nodeName') : null;\n  const getOwnerDocument = Node && Node.prototype ? lookupGetter(Node.prototype, 'ownerDocument') : null;\n  /* Clobber-safe nodeType / nodeName reads through the cached Node.prototype\n     getters, with a direct-property fallback for environments that lack\n     Node.prototype. Sites that need a different fallback (e.g. _isClobbered\n     returns early on a null name) intentionally keep their own reads. */\n  const _readNodeType = function _readNodeType(node) {\n    return getNodeType ? getNodeType(node) : node.nodeType;\n  };\n  const _readNodeName = function _readNodeName(node) {\n    return getNodeName ? getNodeName(node) : node.nodeName;\n  };\n  // As per issue #47, the web-components registry is inherited by a\n  // new document created via createHTMLDocument. As per the spec\n  // (http://w3c.github.io/webcomponents/spec/custom/#creating-and-passing-registries)\n  // a new empty registry is used when creating a template contents owner\n  // document, so we use that as our parent document to ensure nothing\n  // is inherited.\n  if (typeof HTMLTemplateElement === 'function') {\n    const template = document.createElement('template');\n    if (template.content && template.content.ownerDocument) {\n      document = template.content.ownerDocument;\n    }\n  }\n  let trustedTypesPolicy;\n  let emptyHTML = '';\n  // The instance's own internal Trusted Types policy. Unlike a caller-supplied\n  // `TRUSTED_TYPES_POLICY`, this is created at most once — Trusted Types throws\n  // on duplicate policy names — and is the only policy allowed to persist\n  // across configurations and survive `clearConfig()`.\n  let defaultTrustedTypesPolicy;\n  let defaultTrustedTypesPolicyResolved = false;\n  // Tracks whether we are already inside a call to the configured Trusted Types\n  // policy (`createHTML` or `createScriptURL`). If a supplied policy callback\n  // itself calls `DOMPurify.sanitize` (the cause of #1422), `sanitize` would\n  // re-enter the policy and recurse until the stack overflows. We detect that\n  // re-entry and throw a clear, actionable error instead. The guard is shared\n  // across both callbacks, because either one re-entering `sanitize` triggers\n  // the same unbounded recursion.\n  let IN_TRUSTED_TYPES_POLICY = 0;\n  const _assertNotInTrustedTypesPolicy = function _assertNotInTrustedTypesPolicy() {\n    if (IN_TRUSTED_TYPES_POLICY > 0) {\n      throw typeErrorCreate('A configured TRUSTED_TYPES_POLICY callback (createHTML or ' + 'createScriptURL) must not call DOMPurify.sanitize, as that causes ' + 'infinite recursion. Do not pass a policy whose callbacks wrap ' + 'DOMPurify as TRUSTED_TYPES_POLICY; see the \"DOMPurify and Trusted ' + 'Types\" section of the README.');\n    }\n  };\n  const _createTrustedHTML = function _createTrustedHTML(html) {\n    _assertNotInTrustedTypesPolicy();\n    IN_TRUSTED_TYPES_POLICY++;\n    try {\n      return trustedTypesPolicy.createHTML(html);\n    } finally {\n      IN_TRUSTED_TYPES_POLICY--;\n    }\n  };\n  const _createTrustedScriptURL = function _createTrustedScriptURL(scriptUrl) {\n    _assertNotInTrustedTypesPolicy();\n    IN_TRUSTED_TYPES_POLICY++;\n    try {\n      return trustedTypesPolicy.createScriptURL(scriptUrl);\n    } finally {\n      IN_TRUSTED_TYPES_POLICY--;\n    }\n  };\n  // Lazily resolve (and cache) the instance's internal default policy.\n  // Resolution is attempted at most once: a successful `createPolicy` cannot be\n  // repeated (Trusted Types throws on duplicate names), and a failed or\n  // unsupported attempt must not be retried on every parse.\n  const _getDefaultTrustedTypesPolicy = function _getDefaultTrustedTypesPolicy() {\n    if (!defaultTrustedTypesPolicyResolved) {\n      defaultTrustedTypesPolicy = _createTrustedTypesPolicy(trustedTypes, currentScript);\n      defaultTrustedTypesPolicyResolved = true;\n    }\n    return defaultTrustedTypesPolicy;\n  };\n  const _document = document,\n    implementation = _document.implementation,\n    createNodeIterator = _document.createNodeIterator,\n    createDocumentFragment = _document.createDocumentFragment,\n    getElementsByTagName = _document.getElementsByTagName;\n  const importNode = originalDocument.importNode;\n  let hooks = _createHooksMap();\n  /**\n   * Expose whether this browser supports running the full DOMPurify.\n   */\n  DOMPurify.isSupported = typeof entries === 'function' && typeof getParentNode === 'function' && implementation && implementation.createHTMLDocument !== undefined;\n  const MUSTACHE_EXPR$1 = MUSTACHE_EXPR,\n    ERB_EXPR$1 = ERB_EXPR,\n    TMPLIT_EXPR$1 = TMPLIT_EXPR,\n    DATA_ATTR$1 = DATA_ATTR,\n    ARIA_ATTR$1 = ARIA_ATTR,\n    IS_SCRIPT_OR_DATA$1 = IS_SCRIPT_OR_DATA,\n    ATTR_WHITESPACE$1 = ATTR_WHITESPACE,\n    CUSTOM_ELEMENT$1 = CUSTOM_ELEMENT;\n  let IS_ALLOWED_URI$1 = IS_ALLOWED_URI;\n  /**\n   * We consider the elements and attributes below to be safe. Ideally\n   * don't add any new ones but feel free to remove unwanted ones.\n   */\n  /* allowed element names */\n  let ALLOWED_TAGS = null;\n  const DEFAULT_ALLOWED_TAGS = addToSet({}, [...html$1, ...svg$1, ...svgFilters, ...mathMl$1, ...text]);\n  /* Allowed attribute names */\n  let ALLOWED_ATTR = null;\n  const DEFAULT_ALLOWED_ATTR = addToSet({}, [...html, ...svg, ...mathMl, ...xml]);\n  /*\n   * Configure how DOMPurify should handle custom elements and their attributes as well as customized built-in elements.\n   * @property {RegExp|Function|null} tagNameCheck one of [null, regexPattern, predicate]. Default: `null` (disallow any custom elements)\n   * @property {RegExp|Function|null} attributeNameCheck one of [null, regexPattern, predicate]. Default: `null` (disallow any attributes not on the allow list)\n   * @property {boolean} allowCustomizedBuiltInElements allow custom elements derived from built-ins if they pass CUSTOM_ELEMENT_HANDLING.tagNameCheck. Default: `false`.\n   */\n  let CUSTOM_ELEMENT_HANDLING = Object.seal(create(null, {\n    tagNameCheck: {\n      writable: true,\n      configurable: false,\n      enumerable: true,\n      value: null\n    },\n    attributeNameCheck: {\n      writable: true,\n      configurable: false,\n      enumerable: true,\n      value: null\n    },\n    allowCustomizedBuiltInElements: {\n      writable: true,\n      configurable: false,\n      enumerable: true,\n      value: false\n    }\n  }));\n  /* Explicitly forbidden tags (overrides ALLOWED_TAGS/ADD_TAGS) */\n  let FORBID_TAGS = null;\n  /* Explicitly forbidden attributes (overrides ALLOWED_ATTR/ADD_ATTR) */\n  let FORBID_ATTR = null;\n  /* Config object to store ADD_TAGS/ADD_ATTR functions (when used as functions) */\n  const EXTRA_ELEMENT_HANDLING = Object.seal(create(null, {\n    tagCheck: {\n      writable: true,\n      configurable: false,\n      enumerable: true,\n      value: null\n    },\n    attributeCheck: {\n      writable: true,\n      configurable: false,\n      enumerable: true,\n      value: null\n    }\n  }));\n  /* Decide if ARIA attributes are okay */\n  let ALLOW_ARIA_ATTR = true;\n  /* Decide if custom data attributes are okay */\n  let ALLOW_DATA_ATTR = true;\n  /* Decide if unknown protocols are okay */\n  let ALLOW_UNKNOWN_PROTOCOLS = false;\n  /* Decide if self-closing tags in attributes are allowed.\n   * Usually removed due to a mXSS issue in jQuery 3.0 */\n  let ALLOW_SELF_CLOSE_IN_ATTR = true;\n  /* Output should be safe for common template engines.\n   * This means, DOMPurify removes data attributes, mustaches and ERB\n   */\n  let SAFE_FOR_TEMPLATES = false;\n  /* Output should be safe even for XML used within HTML and alike.\n   * This means, DOMPurify removes comments when containing risky content.\n   */\n  let SAFE_FOR_XML = true;\n  /* Decide if document with <html>... should be returned */\n  let WHOLE_DOCUMENT = false;\n  /* Track whether config is already set on this instance of DOMPurify. */\n  let SET_CONFIG = false;\n  /* Pristine allowlist bindings captured at setConfig() time. On the\n   * persistent-config path sanitize() restores the sets from these before\n   * the per-walk hook clone-guard, so a hook's in-call widening cannot\n   * carry across calls. Null until setConfig() is called; reset by\n   * clearConfig(). */\n  let SET_CONFIG_ALLOWED_TAGS = null;\n  let SET_CONFIG_ALLOWED_ATTR = null;\n  /* Decide if all elements (e.g. style, script) must be children of\n   * document.body. By default, browsers might move them to document.head */\n  let FORCE_BODY = false;\n  /* Decide if a DOM `HTMLBodyElement` should be returned, instead of a html\n   * string (or a TrustedHTML object if Trusted Types are supported).\n   * If `WHOLE_DOCUMENT` is enabled a `HTMLHtmlElement` will be returned instead\n   */\n  let RETURN_DOM = false;\n  /* Decide if a DOM `DocumentFragment` should be returned, instead of a html\n   * string  (or a TrustedHTML object if Trusted Types are supported) */\n  let RETURN_DOM_FRAGMENT = false;\n  /* Try to return a Trusted Type object instead of a string, return a string in\n   * case Trusted Types are not supported  */\n  let RETURN_TRUSTED_TYPE = false;\n  /* Output should be free from DOM clobbering attacks?\n   * This sanitizes markups named with colliding, clobberable built-in DOM APIs.\n   */\n  let SANITIZE_DOM = true;\n  /* Achieve full DOM Clobbering protection by isolating the namespace of named\n   * properties and JS variables, mitigating attacks that abuse the HTML/DOM spec rules.\n   *\n   * HTML/DOM spec rules that enable DOM Clobbering:\n   *   - Named Access on Window (§7.3.3)\n   *   - DOM Tree Accessors (§3.1.5)\n   *   - Form Element Parent-Child Relations (§4.10.3)\n   *   - Iframe srcdoc / Nested WindowProxies (§4.8.5)\n   *   - HTMLCollection (§4.2.10.2)\n   *\n   * Namespace isolation is implemented by prefixing `id` and `name` attributes\n   * with a constant string, i.e., `user-content-`\n   */\n  let SANITIZE_NAMED_PROPS = false;\n  const SANITIZE_NAMED_PROPS_PREFIX = 'user-content-';\n  /* Keep element content when removing element? */\n  let KEEP_CONTENT = true;\n  /* If a `Node` is passed to sanitize(), then performs sanitization in-place instead\n   * of importing it into a new Document and returning a sanitized copy */\n  let IN_PLACE = false;\n  /* Allow usage of profiles like html, svg and mathMl */\n  let USE_PROFILES = {};\n  /* Tags to ignore content of when KEEP_CONTENT is true */\n  let FORBID_CONTENTS = null;\n  const DEFAULT_FORBID_CONTENTS = addToSet({}, ['annotation-xml', 'audio', 'colgroup', 'desc', 'foreignobject', 'head', 'iframe', 'math', 'mi', 'mn', 'mo', 'ms', 'mtext', 'noembed', 'noframes', 'noscript', 'plaintext', 'script',\n  // <selectedcontent> mirrors the selected <option>'s subtree, cloned by\n  // the UA (customizable <select>) — including any on* handlers — and the\n  // engine re-mirrors synchronously whenever a removal changes which\n  // option/selectedcontent is current, even inside DOMPurify's inert\n  // DOMParser document. Hoisting its children on removal re-inserts a fresh\n  // mirror target ahead of the walk, which the engine refills, looping\n  // forever (DoS) and amplifying output. Dropping its content on removal\n  // (rather than hoisting) breaks that cascade; the content is a duplicate\n  // of the option, which is sanitized on its own. See campaign-3 F1/F6.\n  'selectedcontent', 'style', 'svg', 'template', 'thead', 'title', 'video', 'xmp']);\n  /* Tags that are safe for data: URIs */\n  let DATA_URI_TAGS = null;\n  const DEFAULT_DATA_URI_TAGS = addToSet({}, ['audio', 'video', 'img', 'source', 'image', 'track']);\n  /* Attributes safe for values like \"javascript:\" */\n  let URI_SAFE_ATTRIBUTES = null;\n  const DEFAULT_URI_SAFE_ATTRIBUTES = addToSet({}, ['alt', 'class', 'for', 'id', 'label', 'name', 'pattern', 'placeholder', 'role', 'summary', 'title', 'value', 'style', 'xmlns']);\n  const MATHML_NAMESPACE = 'http://www.w3.org/1998/Math/MathML';\n  const SVG_NAMESPACE = 'http://www.w3.org/2000/svg';\n  const HTML_NAMESPACE = 'http://www.w3.org/1999/xhtml';\n  /* Document namespace */\n  let NAMESPACE = HTML_NAMESPACE;\n  let IS_EMPTY_INPUT = false;\n  /* Allowed XHTML+XML namespaces */\n  let ALLOWED_NAMESPACES = null;\n  const DEFAULT_ALLOWED_NAMESPACES = addToSet({}, [MATHML_NAMESPACE, SVG_NAMESPACE, HTML_NAMESPACE], stringToString);\n  const DEFAULT_MATHML_TEXT_INTEGRATION_POINTS = freeze(['mi', 'mo', 'mn', 'ms', 'mtext']);\n  let MATHML_TEXT_INTEGRATION_POINTS = addToSet({}, DEFAULT_MATHML_TEXT_INTEGRATION_POINTS);\n  const DEFAULT_HTML_INTEGRATION_POINTS = freeze(['annotation-xml']);\n  let HTML_INTEGRATION_POINTS = addToSet({}, DEFAULT_HTML_INTEGRATION_POINTS);\n  // Certain elements are allowed in both SVG and HTML\n  // namespace. We need to specify them explicitly\n  // so that they don't get erroneously deleted from\n  // HTML namespace.\n  const COMMON_SVG_AND_HTML_ELEMENTS = addToSet({}, ['title', 'style', 'font', 'a', 'script']);\n  /* Parsing of strict XHTML documents */\n  let PARSER_MEDIA_TYPE = null;\n  const SUPPORTED_PARSER_MEDIA_TYPES = ['application/xhtml+xml', 'text/html'];\n  const DEFAULT_PARSER_MEDIA_TYPE = 'text/html';\n  let transformCaseFunc = null;\n  /* Keep a reference to config to pass to hooks */\n  let CONFIG = null;\n  /* Ideally, do not touch anything below this line */\n  /* ______________________________________________ */\n  const formElement = document.createElement('form');\n  const isRegexOrFunction = function isRegexOrFunction(testValue) {\n    return testValue instanceof RegExp || testValue instanceof Function;\n  };\n  /**\n   * _parseConfig\n   *\n   * @param cfg optional config literal\n   */\n  // eslint-disable-next-line complexity\n  const _parseConfig = function _parseConfig() {\n    let cfg = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : {};\n    if (CONFIG && CONFIG === cfg) {\n      return;\n    }\n    /* Shield configuration object from tampering */\n    if (!cfg || typeof cfg !== 'object') {\n      cfg = {};\n    }\n    /* Shield configuration object from prototype pollution */\n    cfg = clone(cfg);\n    PARSER_MEDIA_TYPE =\n    // eslint-disable-next-line unicorn/prefer-includes\n    SUPPORTED_PARSER_MEDIA_TYPES.indexOf(cfg.PARSER_MEDIA_TYPE) === -1 ? DEFAULT_PARSER_MEDIA_TYPE : cfg.PARSER_MEDIA_TYPE;\n    // HTML tags and attributes are not case-sensitive, converting to lowercase. Keeping XHTML as is.\n    transformCaseFunc = PARSER_MEDIA_TYPE === 'application/xhtml+xml' ? stringToString : stringToLowerCase;\n    /* Set configuration parameters */\n    ALLOWED_TAGS = _resolveSetOption(cfg, 'ALLOWED_TAGS', DEFAULT_ALLOWED_TAGS, {\n      transform: transformCaseFunc\n    });\n    ALLOWED_ATTR = _resolveSetOption(cfg, 'ALLOWED_ATTR', DEFAULT_ALLOWED_ATTR, {\n      transform: transformCaseFunc\n    });\n    ALLOWED_NAMESPACES = _resolveSetOption(cfg, 'ALLOWED_NAMESPACES', DEFAULT_ALLOWED_NAMESPACES, {\n      transform: stringToString\n    });\n    URI_SAFE_ATTRIBUTES = _resolveSetOption(cfg, 'ADD_URI_SAFE_ATTR', DEFAULT_URI_SAFE_ATTRIBUTES, {\n      transform: transformCaseFunc,\n      base: DEFAULT_URI_SAFE_ATTRIBUTES\n    });\n    DATA_URI_TAGS = _resolveSetOption(cfg, 'ADD_DATA_URI_TAGS', DEFAULT_DATA_URI_TAGS, {\n      transform: transformCaseFunc,\n      base: DEFAULT_DATA_URI_TAGS\n    });\n    FORBID_CONTENTS = _resolveSetOption(cfg, 'FORBID_CONTENTS', DEFAULT_FORBID_CONTENTS, {\n      transform: transformCaseFunc\n    });\n    FORBID_TAGS = _resolveSetOption(cfg, 'FORBID_TAGS', clone({}), {\n      transform: transformCaseFunc\n    });\n    FORBID_ATTR = _resolveSetOption(cfg, 'FORBID_ATTR', clone({}), {\n      transform: transformCaseFunc\n    });\n    USE_PROFILES = objectHasOwnProperty(cfg, 'USE_PROFILES') ? cfg.USE_PROFILES && typeof cfg.USE_PROFILES === 'object' ? clone(cfg.USE_PROFILES) : cfg.USE_PROFILES : false;\n    ALLOW_ARIA_ATTR = cfg.ALLOW_ARIA_ATTR !== false; // Default true\n    ALLOW_DATA_ATTR = cfg.ALLOW_DATA_ATTR !== false; // Default true\n    ALLOW_UNKNOWN_PROTOCOLS = cfg.ALLOW_UNKNOWN_PROTOCOLS || false; // Default false\n    ALLOW_SELF_CLOSE_IN_ATTR = cfg.ALLOW_SELF_CLOSE_IN_ATTR !== false; // Default true\n    SAFE_FOR_TEMPLATES = cfg.SAFE_FOR_TEMPLATES || false; // Default false\n    SAFE_FOR_XML = cfg.SAFE_FOR_XML !== false; // Default true\n    WHOLE_DOCUMENT = cfg.WHOLE_DOCUMENT || false; // Default false\n    RETURN_DOM = cfg.RETURN_DOM || false; // Default false\n    RETURN_DOM_FRAGMENT = cfg.RETURN_DOM_FRAGMENT || false; // Default false\n    RETURN_TRUSTED_TYPE = cfg.RETURN_TRUSTED_TYPE || false; // Default false\n    FORCE_BODY = cfg.FORCE_BODY || false; // Default false\n    SANITIZE_DOM = cfg.SANITIZE_DOM !== false; // Default true\n    SANITIZE_NAMED_PROPS = cfg.SANITIZE_NAMED_PROPS || false; // Default false\n    KEEP_CONTENT = cfg.KEEP_CONTENT !== false; // Default true\n    IN_PLACE = cfg.IN_PLACE || false; // Default false\n    IS_ALLOWED_URI$1 = isRegex(cfg.ALLOWED_URI_REGEXP) ? cfg.ALLOWED_URI_REGEXP : IS_ALLOWED_URI; // Default regexp\n    NAMESPACE = typeof cfg.NAMESPACE === 'string' ? cfg.NAMESPACE : HTML_NAMESPACE; // Default HTML namespace\n    MATHML_TEXT_INTEGRATION_POINTS = _resolveObjectOption(cfg, 'MATHML_TEXT_INTEGRATION_POINTS', () => addToSet({}, DEFAULT_MATHML_TEXT_INTEGRATION_POINTS) // Default built-in map\n    );\n    HTML_INTEGRATION_POINTS = _resolveObjectOption(cfg, 'HTML_INTEGRATION_POINTS', () => addToSet({}, DEFAULT_HTML_INTEGRATION_POINTS) // Default built-in map\n    );\n    const customElementHandling = _resolveObjectOption(cfg, 'CUSTOM_ELEMENT_HANDLING', () => create(null));\n    CUSTOM_ELEMENT_HANDLING = create(null);\n    if (objectHasOwnProperty(customElementHandling, 'tagNameCheck') && isRegexOrFunction(customElementHandling.tagNameCheck)) {\n      CUSTOM_ELEMENT_HANDLING.tagNameCheck = customElementHandling.tagNameCheck; // Default undefined\n    }\n    if (objectHasOwnProperty(customElementHandling, 'attributeNameCheck') && isRegexOrFunction(customElementHandling.attributeNameCheck)) {\n      CUSTOM_ELEMENT_HANDLING.attributeNameCheck = customElementHandling.attributeNameCheck; // Default undefined\n    }\n    if (objectHasOwnProperty(customElementHandling, 'allowCustomizedBuiltInElements') && typeof customElementHandling.allowCustomizedBuiltInElements === 'boolean') {\n      CUSTOM_ELEMENT_HANDLING.allowCustomizedBuiltInElements = customElementHandling.allowCustomizedBuiltInElements; // Default undefined\n    }\n    seal(CUSTOM_ELEMENT_HANDLING);\n    if (SAFE_FOR_TEMPLATES) {\n      ALLOW_DATA_ATTR = false;\n    }\n    if (RETURN_DOM_FRAGMENT) {\n      RETURN_DOM = true;\n    }\n    /* Parse profile info */\n    if (USE_PROFILES) {\n      ALLOWED_TAGS = addToSet({}, text);\n      ALLOWED_ATTR = create(null);\n      if (USE_PROFILES.html === true) {\n        addToSet(ALLOWED_TAGS, html$1);\n        addToSet(ALLOWED_ATTR, html);\n      }\n      if (USE_PROFILES.svg === true) {\n        addToSet(ALLOWED_TAGS, svg$1);\n        addToSet(ALLOWED_ATTR, svg);\n        addToSet(ALLOWED_ATTR, xml);\n      }\n      if (USE_PROFILES.svgFilters === true) {\n        addToSet(ALLOWED_TAGS, svgFilters);\n        addToSet(ALLOWED_ATTR, svg);\n        addToSet(ALLOWED_ATTR, xml);\n      }\n      if (USE_PROFILES.mathMl === true) {\n        addToSet(ALLOWED_TAGS, mathMl$1);\n        addToSet(ALLOWED_ATTR, mathMl);\n        addToSet(ALLOWED_ATTR, xml);\n      }\n    }\n    /* Always reset function-based ADD_TAGS / ADD_ATTR checks to prevent\n     * leaking across calls when switching from function to array config */\n    EXTRA_ELEMENT_HANDLING.tagCheck = null;\n    EXTRA_ELEMENT_HANDLING.attributeCheck = null;\n    /* Merge configuration parameters */\n    if (objectHasOwnProperty(cfg, 'ADD_TAGS')) {\n      if (typeof cfg.ADD_TAGS === 'function') {\n        EXTRA_ELEMENT_HANDLING.tagCheck = cfg.ADD_TAGS;\n      } else if (arrayIsArray(cfg.ADD_TAGS)) {\n        if (ALLOWED_TAGS === DEFAULT_ALLOWED_TAGS) {\n          ALLOWED_TAGS = clone(ALLOWED_TAGS);\n        }\n        addToSet(ALLOWED_TAGS, cfg.ADD_TAGS, transformCaseFunc);\n      }\n    }\n    if (objectHasOwnProperty(cfg, 'ADD_ATTR')) {\n      if (typeof cfg.ADD_ATTR === 'function') {\n        EXTRA_ELEMENT_HANDLING.attributeCheck = cfg.ADD_ATTR;\n      } else if (arrayIsArray(cfg.ADD_ATTR)) {\n        if (ALLOWED_ATTR === DEFAULT_ALLOWED_ATTR) {\n          ALLOWED_ATTR = clone(ALLOWED_ATTR);\n        }\n        addToSet(ALLOWED_ATTR, cfg.ADD_ATTR, transformCaseFunc);\n      }\n    }\n    if (objectHasOwnProperty(cfg, 'ADD_FORBID_CONTENTS') && arrayIsArray(cfg.ADD_FORBID_CONTENTS)) {\n      if (FORBID_CONTENTS === DEFAULT_FORBID_CONTENTS) {\n        FORBID_CONTENTS = clone(FORBID_CONTENTS);\n      }\n      addToSet(FORBID_CONTENTS, cfg.ADD_FORBID_CONTENTS, transformCaseFunc);\n    }\n    /* Add #text in case KEEP_CONTENT is set to true */\n    if (KEEP_CONTENT) {\n      ALLOWED_TAGS['#text'] = true;\n    }\n    /* Add html, head and body to ALLOWED_TAGS in case WHOLE_DOCUMENT is true */\n    if (WHOLE_DOCUMENT) {\n      addToSet(ALLOWED_TAGS, ['html', 'head', 'body']);\n    }\n    /* Add tbody to ALLOWED_TAGS in case tables are permitted, see #286, #365 */\n    if (ALLOWED_TAGS.table) {\n      addToSet(ALLOWED_TAGS, ['tbody']);\n      delete FORBID_TAGS.tbody;\n    }\n    // Re-derive the active Trusted Types policy from this configuration on\n    // every parse. The active policy must never be sticky closure state that\n    // outlives the config that set it: a caller-supplied policy left in place\n    // after `clearConfig()` — or after a later call that supplied none, or\n    // `TRUSTED_TYPES_POLICY: null` — could sign a subsequent \"default\"\n    // `RETURN_TRUSTED_TYPE` result with a foreign, possibly unsafe policy.\n    // See GHSA-vxr8-fq34-vvx9.\n    if (cfg.TRUSTED_TYPES_POLICY) {\n      if (typeof cfg.TRUSTED_TYPES_POLICY.createHTML !== 'function') {\n        throw typeErrorCreate('TRUSTED_TYPES_POLICY configuration option must provide a \"createHTML\" hook.');\n      }\n      if (typeof cfg.TRUSTED_TYPES_POLICY.createScriptURL !== 'function') {\n        throw typeErrorCreate('TRUSTED_TYPES_POLICY configuration option must provide a \"createScriptURL\" hook.');\n      }\n      // A caller-supplied policy applies to this configuration only.\n      const previousTrustedTypesPolicy = trustedTypesPolicy;\n      trustedTypesPolicy = cfg.TRUSTED_TYPES_POLICY;\n      // Sign local variables required by `sanitize`. If the supplied policy's\n      // `createHTML` is circular (i.e. it calls `DOMPurify.sanitize`), this\n      // throws via the re-entrancy guard. Restore the previous policy first so\n      // the instance is not left in a poisoned state. See #1422.\n      try {\n        emptyHTML = _createTrustedHTML('');\n      } catch (error) {\n        trustedTypesPolicy = previousTrustedTypesPolicy;\n        throw error;\n      }\n    } else if (cfg.TRUSTED_TYPES_POLICY === null) {\n      // Explicit opt-out for this call: perform no Trusted Types signing and\n      // create nothing (so a strict `trusted-types` CSP that disallows a\n      // `dompurify` policy can still call `sanitize` from inside its own\n      // policy — see #1422). Resetting to `undefined` rather than a sticky\n      // `null` also drops any previously retained caller policy, so it cannot\n      // resurface on a later call, while still allowing the next config-less\n      // call to restore the internal default policy. See GHSA-vxr8-fq34-vvx9.\n      trustedTypesPolicy = undefined;\n      emptyHTML = '';\n    } else {\n      // No policy supplied: keep the currently active policy if one is set — a\n      // previously supplied policy is intentionally sticky across config-less\n      // calls — otherwise fall back to the instance's own internal policy,\n      // created at most once. (A policy supplied for a *single* call still\n      // lingers by design; what must not linger is a policy whose configuration\n      // has been torn down via `clearConfig()`, which restores the default.)\n      if (trustedTypesPolicy === undefined) {\n        trustedTypesPolicy = _getDefaultTrustedTypesPolicy();\n      }\n      // Sign internal variables only when a policy is active. A falsy policy\n      // (Trusted Types unsupported, creation failed, or an explicit opt-out)\n      // leaves `emptyHTML` as a plain string, so we never call `.createHTML` on\n      // a non-policy and throw. See #1422.\n      if (trustedTypesPolicy && typeof emptyHTML === 'string') {\n        emptyHTML = _createTrustedHTML('');\n      }\n    }\n    // Prevent further manipulation of configuration.\n    // Not available in IE8, Safari 5, etc.\n    if (freeze) {\n      freeze(cfg);\n    }\n    CONFIG = cfg;\n  };\n  /* Keep track of all possible SVG and MathML tags\n   * so that we can perform the namespace checks\n   * correctly. */\n  const ALL_SVG_TAGS = addToSet({}, [...svg$1, ...svgFilters, ...svgDisallowed]);\n  const ALL_MATHML_TAGS = addToSet({}, [...mathMl$1, ...mathMlDisallowed]);\n  /**\n   * Namespace rules for an element in the SVG namespace.\n   *\n   * @param tagName the element's lowercase tag name\n   * @param parent the (possibly simulated) parent node\n   * @param parentTagName the parent's lowercase tag name\n   * @returns true if a spec-compliant parser could produce this element\n   */\n  const _checkSvgNamespace = function _checkSvgNamespace(tagName, parent, parentTagName) {\n    // The only way to switch from HTML namespace to SVG\n    // is via <svg>. If it happens via any other tag, then\n    // it should be killed.\n    if (parent.namespaceURI === HTML_NAMESPACE) {\n      return tagName === 'svg';\n    }\n    // The only way to switch from MathML to SVG is via <svg>\n    // if the parent is either <annotation-xml> or a MathML\n    // text integration point.\n    if (parent.namespaceURI === MATHML_NAMESPACE) {\n      return tagName === 'svg' && (parentTagName === 'annotation-xml' || MATHML_TEXT_INTEGRATION_POINTS[parentTagName]);\n    }\n    // We only allow elements that are defined in SVG\n    // spec. All others are disallowed in SVG namespace.\n    return Boolean(ALL_SVG_TAGS[tagName]);\n  };\n  /**\n   * Namespace rules for an element in the MathML namespace.\n   *\n   * @param tagName the element's lowercase tag name\n   * @param parent the (possibly simulated) parent node\n   * @param parentTagName the parent's lowercase tag name\n   * @returns true if a spec-compliant parser could produce this element\n   */\n  const _checkMathMlNamespace = function _checkMathMlNamespace(tagName, parent, parentTagName) {\n    // The only way to switch from HTML namespace to MathML\n    // is via <math>. If it happens via any other tag, then\n    // it should be killed.\n    if (parent.namespaceURI === HTML_NAMESPACE) {\n      return tagName === 'math';\n    }\n    // The only way to switch from SVG to MathML is via\n    // <math> and HTML integration points\n    if (parent.namespaceURI === SVG_NAMESPACE) {\n      return tagName === 'math' && HTML_INTEGRATION_POINTS[parentTagName];\n    }\n    // We only allow elements that are defined in MathML\n    // spec. All others are disallowed in MathML namespace.\n    return Boolean(ALL_MATHML_TAGS[tagName]);\n  };\n  /**\n   * Namespace rules for an element in the HTML namespace.\n   *\n   * @param tagName the element's lowercase tag name\n   * @param parent the (possibly simulated) parent node\n   * @param parentTagName the parent's lowercase tag name\n   * @returns true if a spec-compliant parser could produce this element\n   */\n  const _checkHtmlNamespace = function _checkHtmlNamespace(tagName, parent, parentTagName) {\n    // The only way to switch from SVG to HTML is via\n    // HTML integration points, and from MathML to HTML\n    // is via MathML text integration points\n    if (parent.namespaceURI === SVG_NAMESPACE && !HTML_INTEGRATION_POINTS[parentTagName]) {\n      return false;\n    }\n    if (parent.namespaceURI === MATHML_NAMESPACE && !MATHML_TEXT_INTEGRATION_POINTS[parentTagName]) {\n      return false;\n    }\n    // We disallow tags that are specific for MathML\n    // or SVG and should never appear in HTML namespace\n    return !ALL_MATHML_TAGS[tagName] && (COMMON_SVG_AND_HTML_ELEMENTS[tagName] || !ALL_SVG_TAGS[tagName]);\n  };\n  /**\n   * @param element a DOM element whose namespace is being checked\n   * @returns Return false if the element has a\n   *  namespace that a spec-compliant parser would never\n   *  return. Return true otherwise.\n   */\n  const _checkValidNamespace = function _checkValidNamespace(element) {\n    let parent = getParentNode(element);\n    // In JSDOM, if we're inside shadow DOM, then parentNode\n    // can be null. We just simulate parent in this case.\n    if (!parent || !parent.tagName) {\n      parent = {\n        namespaceURI: NAMESPACE,\n        tagName: 'template'\n      };\n    }\n    const tagName = stringToLowerCase(element.tagName);\n    const parentTagName = stringToLowerCase(parent.tagName);\n    if (!ALLOWED_NAMESPACES[element.namespaceURI]) {\n      return false;\n    }\n    if (element.namespaceURI === SVG_NAMESPACE) {\n      return _checkSvgNamespace(tagName, parent, parentTagName);\n    }\n    if (element.namespaceURI === MATHML_NAMESPACE) {\n      return _checkMathMlNamespace(tagName, parent, parentTagName);\n    }\n    if (element.namespaceURI === HTML_NAMESPACE) {\n      return _checkHtmlNamespace(tagName, parent, parentTagName);\n    }\n    // For XHTML and XML documents that support custom namespaces\n    if (PARSER_MEDIA_TYPE === 'application/xhtml+xml' && ALLOWED_NAMESPACES[element.namespaceURI]) {\n      return true;\n    }\n    // The code should never reach this place (this means\n    // that the element somehow got namespace that is not\n    // HTML, SVG, MathML or allowed via ALLOWED_NAMESPACES).\n    // Return false just in case.\n    return false;\n  };\n  /**\n   * _forceRemove\n   *\n   * @param node a DOM node\n   */\n  const _forceRemove = function _forceRemove(node) {\n    arrayPush(DOMPurify.removed, {\n      element: node\n    });\n    try {\n      // eslint-disable-next-line unicorn/prefer-dom-node-remove\n      getParentNode(node).removeChild(node);\n    } catch (_) {\n      /* The normal detach failed — this is reached for a parentless node\n         (getParentNode() is null, so .removeChild throws). Element.prototype\n         .remove() is itself a spec no-op on a parentless node, so a recorded\n         \"removal\" would otherwise hand the caller back an intact,\n         payload-bearing node (e.g. a detached IN_PLACE root the mXSS canary or\n         the style-with-element-child rule decided to kill). Fail closed by\n         throwing — exactly as a clobbered root does at the IN_PLACE entry —\n         rather than trying to \"neutralize\" the node via its own methods.\n         Neutralizing would mean calling getAttributeNames()/removeAttribute()\n         on the node, both of which a <form> root can clobber via a named child\n         (and _isClobbered does not even probe getAttributeNames), so the\n         neutralize step could itself be silently defeated, leaving the payload\n         intact. A throw touches only the cached, clobber-safe remove() and\n         getParentNode(). Generalizes GHSA-r47g-fvhr-h676 (clobbered-form root)\n         to every root-kill reason. REPORT-3.\n                This lives inside the catch, so it never fires for a normally-removed\n         in-tree node: those have a parent, removeChild() succeeds, and the\n         catch is not entered. Only a kept (parentless) root reaches here. */\n      remove(node);\n      if (!getParentNode(node)) {\n        throw typeErrorCreate('a node selected for removal could not be detached from its tree ' + 'and cannot be safely returned; refusing to sanitize in place');\n      }\n    }\n  };\n  /**\n   * _stripAttributeNode\n   *\n   * Remove a single Attr node case/namespace-exactly on an attribute-teardown\n   * path. Name-based removeAttribute() ASCII-lowercases its lookup key for an\n   * HTML element in an HTML document and so silently misses a case-preserved\n   * handler (e.g. `ONERROR` off an XML/XHTML import) - the same defect\n   * _removeAttribute() was fixed for, which a name-based call would reintroduce\n   * on these IN_PLACE teardown paths. Unlike _removeAttribute this does not\n   * record into DOMPurify.removed: the neutralize passes intentionally do not\n   * book-keep. A clobbered/detached node falls back to best-effort name-based\n   * removal.\n   *\n   * @param element the element to strip the attribute from\n   * @param attribute the Attr node to remove\n   * @param name the attribute's name, for the fallback path\n   */\n  const _stripAttributeNode = function _stripAttributeNode(element, attribute, name) {\n    try {\n      removeAttributeNode(element, attribute);\n    } catch (_) {\n      try {\n        element.removeAttribute(name);\n      } catch (_) {}\n    }\n  };\n  /**\n   * _neutralizeRoot\n   *\n   * Fail-closed teardown of an in-place root after the sanitize walk aborts\n   * (campaign-3 F2). An internal throw mid-walk — e.g. a page-registered\n   * custom element's reaction detaches a node so `_forceRemove`'s deliberate\n   * parentless guard throws, or any other re-entrant engine mutation — would\n   * otherwise leave the caller's *live* tree half-sanitized, with everything\n   * after the abort point still carrying its handlers. There is no safe way\n   * to resume the walk (the tree mutated under us), so we strip the root bare:\n   * remove every child and every attribute, then let the caller's catch see\n   * the original error. Clobber-safe (cached `remove`/`childNodes`/`attributes`\n   * getters; the root was already clobber-pre-flighted at the IN_PLACE entry).\n   *\n   * @param root the in-place root to empty\n   */\n  const _neutralizeRoot = function _neutralizeRoot(root) {\n    /* Strip every disallowed attribute (on* handlers included) off the whole\n       subtree BEFORE detaching anything. Detaching first would hand back\n       handler-bearing originals (e.g. an already-loading `<img onerror>`)\n       whose queued resource event still fires in page scope after we throw.\n       Clobber-safe reads; a doomed clobbered node's own attributes are\n       irrelevant while its non-clobbered descendants are reached and scrubbed. */\n    _neutralizeSubtree(root);\n    const childNodes = getChildNodes(root);\n    if (childNodes) {\n      const snapshot = [];\n      arrayForEach(childNodes, child => {\n        arrayPush(snapshot, child);\n      });\n      arrayForEach(snapshot, child => {\n        try {\n          remove(child);\n        } catch (_) {\n          /* Best-effort teardown; a still-attached child is handled below */\n        }\n      });\n    }\n    const attributes = getAttributes(root);\n    if (attributes) {\n      for (let i = attributes.length - 1; i >= 0; --i) {\n        const attribute = attributes[i];\n        const name = attribute && attribute.name;\n        if (typeof name === 'string') {\n          _stripAttributeNode(root, attribute, name);\n        }\n      }\n    }\n  };\n  /**\n   * _removeAttribute\n   *\n   * Name-based getAttributeNode()/removeAttribute() ASCII-lowercase their\n   * lookup key for HTML elements in an HTML document, so they silently miss an\n   * attribute whose stored qualified name still contains uppercase ASCII\n   * letters. That happens when the node came from a case-preserving source\n   * (an XML/XHTML document imported via importNode(), or createAttributeNS()),\n   * where e.g. `ONERROR` survives the walk: the policy check lowercases to\n   * `onerror` and rejects it, but `removeAttribute('ONERROR')` looks up\n   * `onerror` and finds nothing. Remove the exact Attr node instead, which is\n   * case- and namespace-exact, and fall back to name-based removal only when\n   * the caller could not supply the node.\n   *\n   * @param name an Attribute name\n   * @param element a DOM node\n   * @param attr the exact Attr node to remove, when the caller has it\n   */\n  const _removeAttribute = function _removeAttribute(name, element, attr) {\n    if (!attr) {\n      try {\n        attr = element.getAttributeNode(name);\n      } catch (_) {\n        attr = null;\n      }\n    }\n    arrayPush(DOMPurify.removed, {\n      attribute: attr || null,\n      from: element\n    });\n    try {\n      if (attr) {\n        removeAttributeNode(element, attr);\n      } else {\n        element.removeAttribute(name);\n      }\n    } catch (_) {\n      /* Clobbered or already-detached node - best-effort fall back to a\n         name-based removal so the \"is\" handling below still runs. Note this\n         fallback ASCII-lowercases its lookup key in an HTML document and so\n         cannot reach a case-preserved attribute name; the cached\n         removeAttributeNode() above is what removes those, and a clobbered\n         form is already removed wholesale by _isClobbered() before reaching\n         here. */\n      try {\n        element.removeAttribute(name);\n      } catch (_) {}\n    }\n    // We void attribute values for unremovable \"is\" attributes\n    if (name === 'is') {\n      if (RETURN_DOM || RETURN_DOM_FRAGMENT) {\n        try {\n          _forceRemove(element);\n        } catch (_) {}\n      } else {\n        try {\n          element.setAttribute(name, '');\n        } catch (_) {}\n      }\n    }\n  };\n  /**\n   * _stripDisallowedAttributes\n   *\n   * Removes every attribute the active configuration does not allow from a\n   * single element, using the same allowlist as the main attribute pass (so\n   * `on*` handlers go, but no `/^on/` blocklist is introduced). Used only to\n   * neutralise nodes that are being discarded from an in-place tree.\n   *\n   * @param element the element to strip\n   */\n  const _stripDisallowedAttributes = function _stripDisallowedAttributes(element) {\n    const attributes = getAttributes(element);\n    if (!attributes) {\n      return;\n    }\n    for (let i = attributes.length - 1; i >= 0; --i) {\n      const attribute = attributes[i];\n      const name = attribute && attribute.name;\n      if (typeof name !== 'string' || ALLOWED_ATTR[transformCaseFunc(name)]) {\n        continue;\n      }\n      _stripAttributeNode(element, attribute, name);\n    }\n  };\n  /**\n   * _neutralizeSubtree\n   *\n   * Completes the audit-5 F1 fix across every removal path. The KEEP_CONTENT\n   * move-hoist neutralises only disallowed-tag removals; clobber, mXSS-canary,\n   * namespace, comment, processing-instruction and KEEP_CONTENT:false removals\n   * all drop their subtree wholesale via `_forceRemove`. On the IN_PLACE path\n   * those dropped nodes are detached from the caller's LIVE tree but a\n   * handler-bearing original among them (an `<img onerror>`/`<video>` that was\n   * loading) keeps its queued resource event, which fires in page scope after\n   * sanitize returns. This walks a removed subtree and strips every attribute\n   * the active configuration does not allow — so `on*` handlers are cancelled\n   * through the SAME allowlist that governs kept nodes, not a separate `/^on/`\n   * blocklist. Run synchronously before sanitize returns, i.e. before any\n   * queued event can fire. Hook-free by design: these nodes leave the output,\n   * so firing attribute hooks for them would be surprising. Clobber-safe reads;\n   * a doomed clobbered node may shadow `removeAttribute` (its own attributes are\n   * irrelevant — it is discarded — while its non-clobbered descendants, e.g.\n   * the `<img>`, are reached and scrubbed).\n   *\n   * @param root the root of a removed subtree to neutralise\n   */\n  const _neutralizeSubtree = function _neutralizeSubtree(root) {\n    const stack = [root];\n    while (stack.length > 0) {\n      const node = stack.pop();\n      const nodeType = _readNodeType(node);\n      if (nodeType === NODE_TYPE.element) {\n        _stripDisallowedAttributes(node);\n      }\n      const childNodes = getChildNodes(node);\n      if (childNodes) {\n        for (let i = childNodes.length - 1; i >= 0; --i) {\n          stack.push(childNodes[i]);\n        }\n      }\n    }\n  };\n  /**\n   * _neutralizePatchLinkage\n   *\n   * IN_PLACE entry pre-pass (declarative-partial-updates / streaming\n   * hardening, https://github.com/WICG/declarative-partial-updates).\n   *\n   * The main walk strips patch linkage (`for`/`patchsrc`) and removes range\n   * markers (PIs / markup comments) node-by-node, in document order, AS it\n   * reaches each node. On a live in-place root that leaves a window: from the\n   * moment the root is connected until the walk arrives at a given node, that\n   * node's linkage is live. A patch applied on connection/stream can fire as\n   * a microtask during the walk and inject or teleport an unsanitized DOM\n   * range into a region the iterator has already passed and will not revisit,\n   * so the post-return \"tree is sanitized\" contract is violated. Sweep the\n   * whole tree once up front and sever every linkage before the walk begins,\n   * closing that window.\n   *\n   * This CANNOT undo a patch that already fired before sanitize ran — that is\n   * the irreducible \"do not IN_PLACE a live-connected attacker tree\" caveat —\n   * but it closes everything from sanitize-start onward. Gated on SAFE_FOR_XML\n   * to group with the rest of the declarative-partial-updates handling and\n   * stay overridable, consistent with the codebase.\n   *\n   * Clobber-safe traversal (cached childNodes getter); per-node try/catch so a\n   * clobbered root cannot defeat the sweep of its non-clobbered descendants.\n   *\n   * NOTE (pending real-Chrome confirmation, see test/declarative-patch-probe\n   * .html Q1): this mirrors the existing policy of keeping `for` on\n   * <label>/<output>. If the shipping feature can drive a patch through a\n   * surviving `for`-on-label/output + `id` pair, this pre-pass and the\n   * attribute check at _isBasicCustomElement's caller must additionally drop\n   * that pair on the IN_PLACE path. Left as-is until the taxonomy is verified.\n   *\n   * @param root the in-place root to sweep\n   */\n  /**\n   * Central policy for declarative-partial-updates patch-linkage attributes,\n   * shared by the _neutralizePatchLinkage pre-pass and _isValidAttribute so\n   * the two sites cannot drift: `patchsrc` always links, `for` links\n   * everywhere except on <label>/<output>, and the whole policy is gated on\n   * SAFE_FOR_XML (see the rationale block in _isValidAttribute).\n   *\n   * @param lcName the transformCaseFunc'd attribute name\n   * @param lcTag the transformCaseFunc'd tag name of the carrying element\n   * @return true if the attribute is patch linkage and must be dropped\n   */\n  const _isPatchLinkageAttribute = function _isPatchLinkageAttribute(lcName, lcTag) {\n    if (!SAFE_FOR_XML) {\n      return false;\n    }\n    if (lcName === 'patchsrc') {\n      return true;\n    }\n    return lcName === 'for' && lcTag !== 'label' && lcTag !== 'output';\n  };\n  const _neutralizePatchLinkage = function _neutralizePatchLinkage(root) {\n    if (!SAFE_FOR_XML) {\n      return;\n    }\n    const stack = [root];\n    while (stack.length > 0) {\n      const node = stack.pop();\n      const nodeType = _readNodeType(node);\n      /* Remove range markers (the target side of a patch linkage): every\n         processing instruction, and any markup-bearing comment. */\n      if (nodeType === NODE_TYPE.processingInstruction || nodeType === NODE_TYPE.comment && regExpTest(COMMENT_MARKUP_PROBE, node.data)) {\n        try {\n          remove(node);\n        } catch (_) {\n          /* Best-effort */\n        }\n        continue;\n      }\n      /* Strip patch-source attributes (the source side) off elements. */\n      if (nodeType === NODE_TYPE.element) {\n        const element = node;\n        const lcTag = transformCaseFunc(_readNodeName(node));\n        try {\n          if (element.hasAttribute && element.hasAttribute('patchsrc')) {\n            element.removeAttribute('patchsrc');\n          }\n          if (element.hasAttribute && element.hasAttribute('for') && _isPatchLinkageAttribute('for', lcTag)) {\n            element.removeAttribute('for');\n          }\n        } catch (_) {\n          /* Clobbered removeAttribute/hasAttribute on a doomed node — ignore */\n        }\n      }\n      const childNodes = getChildNodes(node);\n      if (childNodes) {\n        for (let i = childNodes.length - 1; i >= 0; --i) {\n          stack.push(childNodes[i]);\n        }\n      }\n    }\n  };\n  /**\n   * _initDocument\n   *\n   * @param dirty - a string of dirty markup\n   * @return a DOM, filled with the dirty markup\n   */\n  const _initDocument = function _initDocument(dirty) {\n    /* Create a HTML document */\n    let doc = null;\n    let leadingWhitespace = null;\n    if (FORCE_BODY) {\n      dirty = '<remove></remove>' + dirty;\n    } else {\n      /* If FORCE_BODY isn't used, leading whitespace needs to be preserved manually */\n      const matches = stringMatch(dirty, /^[\\r\\n\\t ]+/);\n      leadingWhitespace = matches && matches[0];\n    }\n    if (PARSER_MEDIA_TYPE === 'application/xhtml+xml' && NAMESPACE === HTML_NAMESPACE) {\n      // Root of XHTML doc must contain xmlns declaration (see https://www.w3.org/TR/xhtml1/normative.html#strict)\n      dirty = '<html xmlns=\"http://www.w3.org/1999/xhtml\"><head></head><body>' + dirty + '</body></html>';\n    }\n    const dirtyPayload = trustedTypesPolicy ? _createTrustedHTML(dirty) : dirty;\n    /*\n     * Use the DOMParser API by default, fallback later if needs be\n     * DOMParser not work for svg when has multiple root element.\n     */\n    if (NAMESPACE === HTML_NAMESPACE) {\n      try {\n        doc = new DOMParser().parseFromString(dirtyPayload, PARSER_MEDIA_TYPE);\n      } catch (_) {}\n    }\n    /* Use createHTMLDocument in case DOMParser is not available */\n    if (!doc || !doc.documentElement) {\n      doc = implementation.createDocument(NAMESPACE, 'template', null);\n      try {\n        doc.documentElement.innerHTML = IS_EMPTY_INPUT ? emptyHTML : dirtyPayload;\n      } catch (_) {\n        // Syntax error if dirtyPayload is invalid xml\n      }\n    }\n    const body = doc.body || doc.documentElement;\n    if (dirty && leadingWhitespace) {\n      body.insertBefore(document.createTextNode(leadingWhitespace), body.childNodes[0] || null);\n    }\n    /* Work on whole document or just its body */\n    if (NAMESPACE === HTML_NAMESPACE) {\n      return getElementsByTagName.call(doc, WHOLE_DOCUMENT ? 'html' : 'body')[0];\n    }\n    return WHOLE_DOCUMENT ? doc.documentElement : body;\n  };\n  /**\n   * Creates a NodeIterator object that you can use to traverse filtered lists of nodes or elements in a document.\n   *\n   * @param root The root element or node to start traversing on.\n   * @return The created NodeIterator\n   */\n  const _createNodeIterator = function _createNodeIterator(root) {\n    /* Read ownerDocument through the cached Node.prototype getter, never the\n       direct property. HTMLFormElement has [LegacyOverrideBuiltIns], so a\n       clobbering child (<input name=\"ownerDocument\"> or a form-associated\n       external input) shadows the prototype getter and makes a direct read\n       return that <input>. createNodeIterator.call(<input>, ...) then throws\n       \"Illegal invocation\", and on the IN_PLACE path that throw lands before\n       the walk's fail-closed barrier - leaving the caller's live tree, with\n       any already-armed handler in it, un-neutralized. The cached getter\n       returns the real Document regardless of the clobber. */\n    const doc = getOwnerDocument ? getOwnerDocument(root) : root.ownerDocument;\n    return createNodeIterator.call(doc || root, root,\n    // eslint-disable-next-line no-bitwise\n    NodeFilter.SHOW_ELEMENT | NodeFilter.SHOW_COMMENT | NodeFilter.SHOW_TEXT | NodeFilter.SHOW_PROCESSING_INSTRUCTION | NodeFilter.SHOW_CDATA_SECTION, null);\n  };\n  /**\n   * Replace template expression syntax (mustache, ERB, template\n   * literal) with a space; shared by all SAFE_FOR_TEMPLATES scrub\n   * sites. Order matters: mustache, then ERB, then template literal.\n   *\n   * @param value the string to scrub\n   * @returns the scrubbed string\n   */\n  const _stripTemplateExpressions = function _stripTemplateExpressions(value) {\n    value = stringReplace(value, MUSTACHE_EXPR$1, ' ');\n    value = stringReplace(value, ERB_EXPR$1, ' ');\n    value = stringReplace(value, TMPLIT_EXPR$1, ' ');\n    return value;\n  };\n  /**\n   * Strip template-engine expressions ({{...}}, ${...}, <%...%>) from the\n   * character data of an element subtree. Used as the final safety net for\n   * SAFE_FOR_TEMPLATES on every DOM-returning code path so that expressions\n   * which only form after text-node normalization (e.g. fragments split across\n   * stripped elements) cannot survive into a template-evaluating framework.\n   *\n   * Walks text/comment/CDATA/processing-instruction nodes and mutates `.data`\n   * in place rather than round-tripping through innerHTML. This preserves\n   * descendant node references (important for IN_PLACE callers), avoids a\n   * serialize/reparse cycle, and reads literal character data — which means\n   * `<%...%>` in text content matches the ERB regex against its real bytes\n   * instead of the HTML-entity-escaped form innerHTML would produce.\n   *\n   * Attribute values are not visited here; SAFE_FOR_TEMPLATES handling for\n   * attributes is performed during the per-node `_sanitizeAttributes` pass.\n   *\n   * @param node The root element whose character data should be scrubbed.\n   */\n  const _scrubTemplateExpressions2 = function _scrubTemplateExpressions(node) {\n    var _node$querySelectorAl;\n    node.normalize();\n    /* Clobber-safe ownerDocument read, same reasoning as _createNodeIterator:\n       under SAFE_FOR_TEMPLATES this runs on the live IN_PLACE root, which may\n       carry a form-named-getter override of ownerDocument. */\n    const doc = getOwnerDocument ? getOwnerDocument(node) : node.ownerDocument;\n    const walker = createNodeIterator.call(doc || node, node,\n    // eslint-disable-next-line no-bitwise\n    NodeFilter.SHOW_TEXT | NodeFilter.SHOW_COMMENT | NodeFilter.SHOW_CDATA_SECTION | NodeFilter.SHOW_PROCESSING_INSTRUCTION, null);\n    let currentNode = walker.nextNode();\n    while (currentNode) {\n      currentNode.data = _stripTemplateExpressions(currentNode.data);\n      currentNode = walker.nextNode();\n    }\n    // NodeIterator does not descend into <template>.content per the DOM spec,\n    // so we must explicitly recurse into each template's content fragment,\n    // mirroring the approach used by _sanitizeShadowDOM.\n    const templates = (_node$querySelectorAl = node.querySelectorAll) === null || _node$querySelectorAl === void 0 ? void 0 : _node$querySelectorAl.call(node, 'template');\n    if (templates) {\n      arrayForEach(templates, tmpl => {\n        if (_isDocumentFragment(tmpl.content)) {\n          _scrubTemplateExpressions2(tmpl.content);\n        }\n      });\n    }\n  };\n  /**\n   * _isClobbered\n   *\n   * Detect DOM-clobbering on HTMLFormElement nodes. Form is the only HTML\n   * interface with [LegacyOverrideBuiltIns]; a descendant element with a\n   * `name` attribute matching a prototype property shadows that property\n   * on direct reads. We use this check at the IN_PLACE entry-point and\n   * during attribute sanitization to refuse clobbered forms.\n   *\n   * @param element element to check for clobbering attacks\n   * @return true if clobbered, false if safe\n   */\n  const _isClobbered = function _isClobbered(element) {\n    // Realm-independent tag-name probe. If we can't determine the tag\n    // name at all, we can't reason about clobbering — return false\n    // (the caller's other defences still apply).\n    const realTagName = getNodeName ? getNodeName(element) : null;\n    if (typeof realTagName !== 'string') {\n      return false;\n    }\n    if (transformCaseFunc(realTagName) !== 'form') {\n      return false;\n    }\n    return typeof element.nodeName !== 'string' || typeof element.textContent !== 'string' || typeof element.removeChild !== 'function' ||\n    // Realm-safe NamedNodeMap detection: equality against the cached\n    // prototype getter. Clobbered .attributes (e.g. <input name=\"attributes\">)\n    // makes the direct read diverge from the cached read; a clean form\n    // (same-realm OR foreign-realm) has both reads pointing at the same\n    // canonical NamedNodeMap.\n    element.attributes !== getAttributes(element) || typeof element.removeAttribute !== 'function' ||\n    // A form descendant named \"removeAttributeNode\" or \"getAttributeNode\"\n    // shadows these Attr-node methods via [LegacyOverrideBuiltIns].\n    // _removeAttribute() / _stripAttributeNode() reach for\n    // element.removeAttributeNode(attr) first; when it is shadowed the call\n    // throws and the name-based fallback element.removeAttribute(name)\n    // ASCII-lowercases its lookup key in an HTML document, silently missing\n    // a case-preserved event-handler attribute (e.g. an ONANIMATIONSTART\n    // that reached the sanitizer through an XML/XHTML parse). Flag the form\n    // so it is removed wholesale, exactly as for the other shadowed methods.\n    typeof element.removeAttributeNode !== 'function' || typeof element.getAttributeNode !== 'function' || typeof element.setAttribute !== 'function' || typeof element.namespaceURI !== 'string' || typeof element.insertBefore !== 'function' || typeof element.hasChildNodes !== 'function' ||\n    // NodeType clobbering probe. Cached Node.prototype.nodeType getter\n    // returns the integer 1 for any Element regardless of realm; direct\n    // read on a clobbered form (e.g. <input name=\"nodeType\">) returns\n    // the named child element. Cheap addition — nodeType is read from\n    // an internal slot, no serialization cost — and removes a residual\n    // clobbering surface used by several mXSS / PI / comment branches\n    // in _sanitizeElements that compare currentNode.nodeType directly.\n    element.nodeType !== getNodeType(element) ||\n    // HTMLFormElement has [LegacyOverrideBuiltIns]: a descendant named\n    // \"childNodes\" shadows the prototype getter. Direct reads of\n    // form.childNodes from a clobbered form return the named child\n    // instead of the real NodeList, so any walk that reads it directly\n    // skips the form's real children. Compare the direct read to the\n    // cached Node.prototype getter — when the form's named-property\n    // getter intercepts the read, the two values differ and we flag\n    // the form. This catches every clobbering child type (input,\n    // select, etc.) regardless of whether the named child happens to\n    // carry a numeric .length, which a typeof-based probe would miss\n    // (e.g. HTMLSelectElement.length is a defined unsigned-long).\n    element.childNodes !== getChildNodes(element);\n  };\n  /**\n   * Checks whether the given value is a DocumentFragment from any realm.\n   *\n   * The realm-independent replacement reads `nodeType` through the cached\n   * Node.prototype getter and compares to the DOCUMENT_FRAGMENT_NODE\n   * constant (11). nodeType is a numeric value resolved from the node's\n   * internal slot, identical across realms for the same kind of node.\n   *\n   * @param value object to check\n   * @return true if value is a DocumentFragment-shaped node from any realm\n   */\n  const _isDocumentFragment = function _isDocumentFragment(value) {\n    if (!getNodeType || typeof value !== 'object' || value === null) {\n      return false;\n    }\n    try {\n      return getNodeType(value) === NODE_TYPE.documentFragment;\n    } catch (_) {\n      return false;\n    }\n  };\n  /**\n   * Checks whether the given object is a DOM node, including nodes that\n   * originate from a different window/realm (e.g. an iframe's\n   * contentDocument). The previous `value instanceof Node` check was\n   * realm-bound: nodes from a different window failed it, causing\n   * sanitize() to silently stringify them and reset IN_PLACE to false,\n   * returning the original node unsanitized. See GHSA-4w3q-35jp-p934.\n   *\n   * @param value object to check whether it's a DOM node\n   * @return true if value is a DOM node from any realm\n   */\n  const _isNode = function _isNode(value) {\n    if (!getNodeType || typeof value !== 'object' || value === null) {\n      return false;\n    }\n    try {\n      return typeof getNodeType(value) === 'number';\n    } catch (_) {\n      return false;\n    }\n  };\n  function _executeHooks(hooks, currentNode, data) {\n    if (hooks.length === 0) {\n      return;\n    }\n    arrayForEach(hooks, hook => {\n      hook.call(DOMPurify, currentNode, data, CONFIG);\n    });\n  }\n  /**\n   * Structural-threat checks that condemn a node regardless of the\n   * allowlists: mXSS via namespace confusion, risky CSS construction,\n   * processing instructions, markup-bearing comments. Pure predicate;\n   * the caller removes. Check order is load-bearing.\n   *\n   * @param currentNode the node to inspect\n   * @param tagName the node's transformCaseFunc'd tag name\n   * @return true if the node must be removed\n   */\n  const _isUnsafeNode = function _isUnsafeNode(currentNode, tagName) {\n    /* Detect mXSS attempts abusing namespace confusion */\n    if (SAFE_FOR_XML && currentNode.hasChildNodes() && !_isNode(currentNode.firstElementChild) && regExpTest(ELEMENT_MARKUP_PROBE, currentNode.textContent) && regExpTest(ELEMENT_MARKUP_PROBE, currentNode.innerHTML)) {\n      return true;\n    }\n    /* Remove rawtext/literal-text elements whose literal serialization\n       re-opens markup on an HTML reparse - shapes (a) and (b) documented at\n       LITERAL_TEXT_ELEMENTS. Both are invisible to rule 1 above (which\n       self-disables once there is an element child, and whose second probe\n       reads the innerHTML an XML/XHTML document serializes escaped), which\n       is why both probes here read textContent instead. Previously only\n       `style`-with-element-child was covered; every element in\n       LITERAL_TEXT_ELEMENTS shares this literal serialization and is\n       equally affected. */\n    if (SAFE_FOR_XML && currentNode.namespaceURI === HTML_NAMESPACE && LITERAL_TEXT_ELEMENTS[tagName] && (_isNode(currentNode.firstElementChild) || typeof currentNode.textContent === 'string' && regExpTest(LITERAL_TEXT_CLOSE[tagName], currentNode.textContent))) {\n      return true;\n    }\n    /* Remove any occurrence of processing instructions */\n    if (currentNode.nodeType === NODE_TYPE.processingInstruction) {\n      return true;\n    }\n    /* Remove any kind of possibly harmful comments */\n    if (SAFE_FOR_XML && currentNode.nodeType === NODE_TYPE.comment && regExpTest(COMMENT_MARKUP_PROBE, currentNode.data)) {\n      return true;\n    }\n    return false;\n  };\n  /**\n   * Evaluate a CUSTOM_ELEMENT_HANDLING check (a RegExp or a predicate\n   * function, per the validation in _parseConfig) against a name.\n   * Additional arguments are forwarded to predicate functions - the\n   * attributeNameCheck predicate receives the tag name as its second\n   * argument. A null/absent check never matches.\n   *\n   * @param check the configured tagNameCheck / attributeNameCheck value\n   * @param name the name to test\n   * @param args extra arguments forwarded to a predicate function\n   * @return true if the check matches the name\n   */\n  const _matchesNameCheck = function _matchesNameCheck(check, name) {\n    if (check instanceof RegExp) {\n      return regExpTest(check, name);\n    }\n    if (check instanceof Function) {\n      for (var _len = arguments.length, args = new Array(_len > 2 ? _len - 2 : 0), _key = 2; _key < _len; _key++) {\n        args[_key - 2] = arguments[_key];\n      }\n      return Boolean(check(name, ...args));\n    }\n    return false;\n  };\n  /**\n   * Handle a node whose tag is forbidden or not allowlisted: keep\n   * allowed custom elements (false return exits _sanitizeElements\n   * early - the namespace and fallback-tag removal checks are\n   * intentionally skipped for kept custom elements), else hoist\n   * content per KEEP_CONTENT and remove.\n   *\n   * A kept custom element is the ONLY case in which this function\n   * returns false, so the caller uses that return value to run the\n   * afterSanitizeElements hook on the kept element and keep the\n   * element-hook lifecycle consistent with normal allowlisted\n   * elements (GHSA-c2j3-45gr-mqc4).\n   *\n   * @param currentNode the disallowed node\n   * @param tagName the node's transformCaseFunc'd tag name\n   * @return true if the node was removed, false if kept\n   */\n  const _sanitizeDisallowedNode = function _sanitizeDisallowedNode(currentNode, tagName, root) {\n    /* Check if we have a custom element to handle */\n    if (!FORBID_TAGS[tagName] && _isBasicCustomElement(tagName) && _matchesNameCheck(CUSTOM_ELEMENT_HANDLING.tagNameCheck, tagName)) {\n      return false;\n    }\n    /* Keep content except for bad-listed elements.\n         Use the cached prototype getters exclusively — the previous code\n         had `|| currentNode.parentNode` / `|| currentNode.childNodes`\n         fallbacks, but the cached getters always return the canonical\n         value (or null for a real parent-less node), so the fallback\n         path was dead in safe cases and a clobbering surface in unsafe\n         ones. Falsy cached results stay falsy; the `if (childNodes &&\n         parentNode)` check already gates correctly. */\n    if (KEEP_CONTENT && !FORBID_CONTENTS[tagName]) {\n      const parentNode = getParentNode(currentNode);\n      const childNodes = getChildNodes(currentNode);\n      if (childNodes && parentNode) {\n        const childCount = childNodes.length;\n        /* Hoist by moving each child up one level rather than deep-cloning\n             it. Moving transfers every descendant exactly once, so a chain of\n             nested disallowed elements costs O(n) instead of the O(n^2) that\n             re-cloning the shrinking subtree at each level produced; it also\n             empties the removed original, so `DOMPurify.removed` no longer\n             pins whole subtrees. Moving preserves the in-place guarantee too:\n             an original carrying already-queued resource events (`<img\n             onerror>`, `<video>`/`<audio>` error, lazy/`onload`, …) is\n             relocated and sanitised rather than left detached but still armed.\n                      The sole case that must clone is removing the walk root itself.\n             The result is serialised from the root's subtree, so a restrictive\n             ALLOWED_TAGS that strips the root (`body` on the string path) must\n             leave the content inside it, which only cloning does. In IN_PLACE\n             the root is pre-validated as an allowed tag and so is never removed\n             here, so that path always takes the move branch.\n                      `childNodes` is live; a tail-to-head walk keeps `childNodes[i]`\n             valid whether we move (drops the trailing entry) or clone (leaves\n             the list intact). */\n        for (let i = childCount - 1; i >= 0; --i) {\n          const hoisted = currentNode === root ? cloneNode(childNodes[i], true) : childNodes[i];\n          parentNode.insertBefore(hoisted, getNextSibling(currentNode));\n        }\n      }\n    }\n    _forceRemove(currentNode);\n    return true;\n  };\n  /**\n   * Fork a hook-mutable allowlist off its shared binding the first time a\n   * (possibly lazily-installed) uponSanitize* hook is about to see it, so the\n   * hook cannot widen the per-instance default or the setConfig binding by\n   * reference and leak past the call. Returns the set unchanged once it is\n   * already call-local, so repeated calls across elements are idempotent.\n   *\n   * @param hookList the uponSanitize* hook array for this event\n   * @param set the current ALLOWED_TAGS / ALLOWED_ATTR binding\n   * @param defaultSet the per-instance DEFAULT_ALLOWED_* constant\n   * @param setConfigSet the captured setConfig() binding, or null\n   * @return a call-local clone if a hook is present and set is still shared,\n   *   else set unchanged\n   */\n  const _forkSharedAllowlist = function _forkSharedAllowlist(hookList, set, defaultSet, setConfigSet) {\n    if (hookList.length === 0) {\n      return set;\n    }\n    return set === defaultSet || set === setConfigSet ? clone(set) : set;\n  };\n  /**\n   * Shared guard for a node that a hook has detached from the walk tree,\n   * used after each element-hook site in _sanitizeElements. Detaching is a\n   * long-standing user pattern (issue #469; draw.io-style foreignObject\n   * filtering). Per the cached, unclobberable parentNode getter the node is\n   * genuinely out of the tree, so it can reach neither the serialized\n   * output nor an IN_PLACE live tree; treat it as removed and stop\n   * processing it. Without this guard, the unsafe-node / namespace checks\n   * would call _forceRemove on a parentless node and hit the REPORT-3\n   * fail-closed throw — which exists for nodes DOMPurify wants gone but\n   * *cannot* detach (clobbered / parentless roots), the opposite of a node\n   * that is already safely gone. The walk root is exempt: a detached\n   * IN_PLACE root is legitimate input and must still be fully sanitized,\n   * and a kill-decision on it must keep hitting the REPORT-3 throw.\n   *\n   * Nodes detached by hooks stay the hook's responsibility for placement:\n   * they are not recorded in DOMPurify.removed, so the post-walk IN_PLACE\n   * pass (which iterates DOMPurify.removed) does not reach them. But a\n   * hook-detached subtree can still hold a queued resource-event handler -\n   * e.g. an <img onload> that began loading when the caller built the live\n   * tree - which fires in page scope after sanitize returns even though the\n   * handler never reached the returned tree. That is the audit-5 F1 hazard,\n   * and the documented node.remove() hook pattern walks straight into it.\n   * So on the IN_PLACE path we neutralize the detached subtree inline,\n   * stripping its non-allow-listed attributes before returning, exactly as\n   * the post-walk pass does for _forceRemove'd subtrees.\n   *\n   * @param currentNode the node a hook may have detached\n   * @param root the current walk root\n   * @return true if the node is detached and now handled, false otherwise\n   */\n  const _handleHookDetachedNode = function _handleHookDetachedNode(currentNode, root) {\n    if (currentNode === root || getParentNode(currentNode) !== null) {\n      return false;\n    }\n    if (IN_PLACE) {\n      _neutralizeSubtree(currentNode);\n    }\n    return true;\n  };\n  /**\n   * _sanitizeElements\n   *\n   * @protect nodeName\n   * @protect textContent\n   * @protect removeChild\n   * @param currentNode to check for permission to exist\n   * @return true if node was killed, false if left alive\n   */\n  const _sanitizeElements = function _sanitizeElements(currentNode, root) {\n    /* Execute a hook if present */\n    _executeHooks(hooks.beforeSanitizeElements, currentNode, null);\n    /* A hook may have detached the node - treat it as removed (see\n       _handleHookDetachedNode for the full rationale). */\n    if (_handleHookDetachedNode(currentNode, root)) {\n      return true;\n    }\n    /* Check if element is clobbered or can clobber */\n    if (_isClobbered(currentNode)) {\n      _forceRemove(currentNode);\n      return true;\n    }\n    /* Now let's check the element's type and name */\n    const tagName = transformCaseFunc(_readNodeName(currentNode));\n    /* Close the pre-walk clone-guard's timing gap: an uponSanitizeElement\n       hook may have been installed after that guard sampled the hook arrays\n       (e.g. lazily from beforeSanitizeElements), leaving ALLOWED_TAGS still\n       aliasing a shared binding that a widening hook would mutate by\n       reference. Fork it before exposing it to the hook. */\n    ALLOWED_TAGS = _forkSharedAllowlist(hooks.uponSanitizeElement, ALLOWED_TAGS, DEFAULT_ALLOWED_TAGS, SET_CONFIG_ALLOWED_TAGS);\n    /* Execute a hook if present */\n    _executeHooks(hooks.uponSanitizeElement, currentNode, {\n      tagName,\n      allowedTags: ALLOWED_TAGS\n    });\n    /* The uponSanitizeElement hook may have detached the node, exactly as\n       above (see _handleHookDetachedNode for the full rationale). */\n    if (_handleHookDetachedNode(currentNode, root)) {\n      return true;\n    }\n    /* Remove mXSS vectors, processing instructions and risky comments */\n    if (_isUnsafeNode(currentNode, tagName)) {\n      _forceRemove(currentNode);\n      return true;\n    }\n    /* Remove element if anything forbids its presence */\n    if (FORBID_TAGS[tagName] || !(EXTRA_ELEMENT_HANDLING.tagCheck instanceof Function && EXTRA_ELEMENT_HANDLING.tagCheck(tagName)) && !ALLOWED_TAGS[tagName]) {\n      const removed = _sanitizeDisallowedNode(currentNode, tagName, root);\n      /* A false return means the node is a custom element kept via\n         CUSTOM_ELEMENT_HANDLING - the only keep path through\n         _sanitizeDisallowedNode. Run afterSanitizeElements on it so the\n         element-hook lifecycle matches normal allowlisted elements: a\n         security policy applied in this hook (e.g. stripping an attribute\n         from every surviving element) must not silently skip kept custom\n         elements (GHSA-c2j3-45gr-mqc4). This mirrors the normal-element\n         tail below - the hook runs, then the walker's subsequent\n         _sanitizeAttributes pass sanitizes the element's attributes. The\n         deliberately skipped namespace and fallback-tag removal checks stay\n         skipped; they are removal decisions, not the hook contract. */\n      if (removed === false) {\n        _executeHooks(hooks.afterSanitizeElements, currentNode, null);\n      }\n      return removed;\n    }\n    /* Check whether element has a valid namespace.\n       Realm-safe check (GHSA-hpcv-96wg-7vj8): use the cached Node.prototype\n       nodeType getter rather than `instanceof Element`, which is realm-\n       bound and short-circuits to false for any node minted in a different\n       realm — letting a foreign-realm element with a forbidden namespace\n       slip past the namespace check entirely. */\n    const nt = _readNodeType(currentNode);\n    if (nt === NODE_TYPE.element && !_checkValidNamespace(currentNode)) {\n      _forceRemove(currentNode);\n      return true;\n    }\n    /* Make sure that older browsers don't get fallback-tag mXSS */\n    if ((tagName === 'noscript' || tagName === 'noembed' || tagName === 'noframes') && regExpTest(FALLBACK_TAG_CLOSE, currentNode.innerHTML)) {\n      _forceRemove(currentNode);\n      return true;\n    }\n    /* Sanitize element content to be template-safe */\n    if (SAFE_FOR_TEMPLATES && currentNode.nodeType === NODE_TYPE.text) {\n      /* Get the element's text content */\n      const content = _stripTemplateExpressions(currentNode.textContent);\n      if (currentNode.textContent !== content) {\n        arrayPush(DOMPurify.removed, {\n          element: currentNode.cloneNode()\n        });\n        currentNode.textContent = content;\n      }\n    }\n    /* Execute a hook if present */\n    _executeHooks(hooks.afterSanitizeElements, currentNode, null);\n    return false;\n  };\n  /**\n   * _isValidAttribute\n   *\n   * @param lcTag Lowercase tag name of containing element.\n   * @param lcName Lowercase attribute name.\n   * @param value Attribute value.\n   * @return Returns true if `value` is valid, otherwise false.\n   */\n  // eslint-disable-next-line complexity\n  const _isValidAttribute = function _isValidAttribute(lcTag, lcName, value) {\n    /* FORBID_ATTR must always win, even if ADD_ATTR predicate would allow it */\n    if (FORBID_ATTR[lcName]) {\n      return false;\n    }\n    /* Reject declarative-partial-updates patch-linkage attributes\n       (https://github.com/WICG/declarative-partial-updates).\n            Empirical note (Chrome 150, verified — see\n       test/declarative-patch-probe-v3.html): expansion is NOT applied after\n       sanitization. For the string path it fires during sanitize()'s own\n       parse, so the walk sees and sanitizes the fully materialized expanded\n       tree — teleports into MathML/SVG integration points included; a\n       weaponized `<template for>`->`<img onerror>` comes back with the handler\n       stripped. For the IN_PLACE path it fires on connection, before the walk.\n       Either way DOMPurify is NOT blind to the patch.\n            This removal is therefore defense-in-depth rather than the sole barrier:\n       it prevents live linkage from surviving into the OUTPUT and re-expanding\n       in the caller's context, and keeps behaviour deterministic if a future\n       engine defers expansion. `for` is legitimate only on <label>/<output>;\n       anywhere else (notably <template for>) it links the element to a patch\n       target and teleports or removes an arbitrary DOM range by id/marker name.\n       `patchsrc` fetches remote markup and is treated as a script-loading\n       mechanism (CSP). Gated on SAFE_FOR_XML so the removal groups with the\n       other structural-threat checks and stays overridable, consistent with\n       the rest of the codebase. PI range markers are already removed by\n       _isUnsafeNode. */\n    if (_isPatchLinkageAttribute(lcName, lcTag)) {\n      return false;\n    }\n    /* Make sure attribute cannot clobber */\n    if (SANITIZE_DOM && (lcName === 'id' || lcName === 'name') && (value in document || value in formElement)) {\n      return false;\n    }\n    const nameIsPermitted = ALLOWED_ATTR[lcName] || EXTRA_ELEMENT_HANDLING.attributeCheck instanceof Function && EXTRA_ELEMENT_HANDLING.attributeCheck(lcName, lcTag);\n    /* Allow valid data-* attributes: At least one character after \"-\"\n        (https://html.spec.whatwg.org/multipage/dom.html#embedding-custom-non-visible-data-with-the-data-*-attributes)\n        XML-compatible (https://html.spec.whatwg.org/multipage/infrastructure.html#xml-compatible and http://www.w3.org/TR/xml/#d0e804)\n        We don't need to check the value; it's always URI safe. */\n    if (ALLOW_DATA_ATTR && regExpTest(DATA_ATTR$1, lcName)) {\n      return true;\n    }\n    /* Allow valid aria-* attributes, the value is always URI safe */\n    if (ALLOW_ARIA_ATTR && regExpTest(ARIA_ATTR$1, lcName)) {\n      return true;\n    }\n    /* A name outside the allowlist is acceptable on custom-element terms\n       only. The value checks below are intentionally skipped in that case:\n       if the user supplied a tagNameCheck we also allow derived custom\n       elements using the same test, and attributes passing the configured\n       attributeNameCheck are allowed as custom elements define these at\n       their own discretion. */\n    if (!nameIsPermitted) {\n      return (\n        // Condition a) covers a basically valid custom element tag name whose\n        // tag passes the configured tagNameCheck and whose attribute name\n        // passes the configured attributeNameCheck ...\n        _isBasicCustomElement(lcTag) && _matchesNameCheck(CUSTOM_ELEMENT_HANDLING.tagNameCheck, lcTag) && _matchesNameCheck(CUSTOM_ELEMENT_HANDLING.attributeNameCheck, lcName, lcTag) ||\n        // Condition b) covers an `is` attribute whose value passes the\n        // configured tagNameCheck while customized built-in elements are\n        // allowed.\n        lcName === 'is' && CUSTOM_ELEMENT_HANDLING.allowCustomizedBuiltInElements && _matchesNameCheck(CUSTOM_ELEMENT_HANDLING.tagNameCheck, value)\n      );\n    }\n    /* Check value is safe. First, is attr inert? If so, is safe */\n    if (URI_SAFE_ATTRIBUTES[lcName]) {\n      return true;\n    }\n    /* Check no script, data or unknown possibly unsafe URI\n        unless we know URI values are safe for that attribute */\n    if (regExpTest(IS_ALLOWED_URI$1, stringReplace(value, ATTR_WHITESPACE$1, ''))) {\n      return true;\n    }\n    /* Keep image data URIs alive if src/xlink:href is allowed */\n    /* Further prevent gadget XSS for dynamically built script tags */\n    if ((lcName === 'src' || lcName === 'xlink:href' || lcName === 'href') && lcTag !== 'script' && stringIndexOf(value, 'data:') === 0 && DATA_URI_TAGS[lcTag]) {\n      return true;\n    }\n    /* Allow unknown protocols: This provides support for links that\n        are handled by protocol handlers which may be unknown ahead of\n        time, e.g. fb:, spotify: */\n    if (ALLOW_UNKNOWN_PROTOCOLS && !regExpTest(IS_SCRIPT_OR_DATA$1, stringReplace(value, ATTR_WHITESPACE$1, ''))) {\n      return true;\n    }\n    /* Only an empty (binary) value remains safe at this point;\n       anything else is presumed unsafe, do not add it back */\n    return !value;\n  };\n  /* Names the HTML spec reserves from valid-custom-element-name; these must\n   * never be treated as basic custom elements even when a permissive\n   * CUSTOM_ELEMENT_HANDLING.tagNameCheck is configured. */\n  const RESERVED_CUSTOM_ELEMENT_NAMES = addToSet({}, ['annotation-xml', 'color-profile', 'font-face', 'font-face-format', 'font-face-name', 'font-face-src', 'font-face-uri', 'missing-glyph']);\n  /**\n   * _isBasicCustomElement\n   * checks if at least one dash is included in tagName, and it's not the first char\n   * for more sophisticated checking see https://github.com/sindresorhus/validate-element-name\n   *\n   * @param tagName name of the tag of the node to sanitize\n   * @returns Returns true if the tag name meets the basic criteria for a custom element, otherwise false.\n   */\n  const _isBasicCustomElement = function _isBasicCustomElement(tagName) {\n    return !RESERVED_CUSTOM_ELEMENT_NAMES[stringToLowerCase(tagName)] && regExpTest(CUSTOM_ELEMENT$1, tagName);\n  };\n  /**\n   * Wrap an attribute value in the matching Trusted Types object when\n   * the active policy requires it. Namespaced attributes pass through\n   * unchanged (no TT support yet, see\n   * https://bugs.chromium.org/p/chromium/issues/detail?id=1305293).\n   *\n   * @param lcTag lowercase tag name of the containing element\n   * @param lcName lowercase attribute name\n   * @param namespaceURI the attribute's namespace, if any\n   * @param value the attribute value to wrap\n   * @return the value, wrapped when Trusted Types demand it\n   */\n  const _applyTrustedTypesToAttribute = function _applyTrustedTypesToAttribute(lcTag, lcName, namespaceURI, value) {\n    if (trustedTypesPolicy && typeof trustedTypes === 'object' && typeof trustedTypes.getAttributeType === 'function' && !namespaceURI) {\n      switch (trustedTypes.getAttributeType(lcTag, lcName)) {\n        case 'TrustedHTML':\n          {\n            return _createTrustedHTML(value);\n          }\n        case 'TrustedScriptURL':\n          {\n            return _createTrustedScriptURL(value);\n          }\n      }\n    }\n    return value;\n  };\n  /**\n   * Write a modified attribute value back onto the element. On\n   * success, re-probe for clobbering introduced by the new value and\n   * remove the element when found; otherwise, when this writeback is the\n   * recreate half of the SANITIZE_NAMED_PROPS remove-and-recreate, pop the\n   * removal entry that path recorded so it does not show as removed. On\n   * failure, remove the attribute instead.\n   *\n   * Returns true only on a clean write (the value was set and the new value\n   * introduced no clobbering). The caller uses that, together with its own\n   * knowledge of whether this attribute pushed a DOMPurify.removed record, to\n   * decide whether to pop that record. The pop must happen ONLY for the\n   * named-prop remove-and-recreate; popping on any other value change (trim,\n   * template scrubbing, Trusted Types) would consume an unrelated _forceRemove\n   * subtree-cleanup record and let that detached subtree keep a live event\n   * handler through the IN_PLACE neutralization pass (SO-001).\n   *\n   * @param currentNode the element carrying the attribute\n   * @param name the attribute name as present on the element\n   * @param namespaceURI the attribute's namespace, if any\n   * @param value the new attribute value\n   * @return true if the value was written without introducing clobbering\n   */\n  const _setAttributeValue = function _setAttributeValue(currentNode, name, namespaceURI, value) {\n    try {\n      if (namespaceURI) {\n        currentNode.setAttributeNS(namespaceURI, name, value);\n      } else {\n        /* Fallback to setAttribute() for browser-unrecognized namespaces e.g. \"x-schema\". */\n        currentNode.setAttribute(name, value);\n      }\n      if (_isClobbered(currentNode)) {\n        _forceRemove(currentNode);\n        return false;\n      }\n      return true;\n    } catch (_) {\n      _removeAttribute(name, currentNode);\n      return false;\n    }\n  };\n  /**\n   * _sanitizeAttributes\n   *\n   * @protect attributes\n   * @protect nodeName\n   * @protect removeAttribute\n   * @protect setAttribute\n   *\n   * @param currentNode to sanitize\n   */\n  // eslint-disable-next-line complexity\n  const _sanitizeAttributes = function _sanitizeAttributes(currentNode) {\n    /* Execute a hook if present */\n    _executeHooks(hooks.beforeSanitizeAttributes, currentNode, null);\n    const attributes = currentNode.attributes;\n    /* Check if we have attributes; if not we might have a text node */\n    if (!attributes || _isClobbered(currentNode)) {\n      return;\n    }\n    /* Same lazy-install guard as uponSanitizeElement (see there): fork the\n       attribute allowlist off its shared binding before a hook can see it. */\n    ALLOWED_ATTR = _forkSharedAllowlist(hooks.uponSanitizeAttribute, ALLOWED_ATTR, DEFAULT_ALLOWED_ATTR, SET_CONFIG_ALLOWED_ATTR);\n    const hookEvent = {\n      attrName: '',\n      attrValue: '',\n      keepAttr: true,\n      allowedAttributes: ALLOWED_ATTR,\n      forceKeepAttr: undefined\n    };\n    let l = attributes.length;\n    const lcTag = transformCaseFunc(currentNode.nodeName);\n    /* Go backwards over all attributes; safely remove bad ones */\n    while (l--) {\n      const attr = attributes[l];\n      const name = attr.name,\n        namespaceURI = attr.namespaceURI,\n        attrValue = attr.value;\n      const lcName = transformCaseFunc(name);\n      const initValue = attrValue;\n      let value = name === 'value' ? initValue : stringTrim(initValue);\n      /* Tracks whether this specific attribute pushed a DOMPurify.removed\n         record that a later _setAttributeValue() writeback is expected to pop\n         back off (the SANITIZE_NAMED_PROPS remove-and-recreate below is the\n         only path that does). A value that merely changed via trim, template\n         scrubbing, or Trusted Types pushes no such record, so its writeback\n         must NOT pop — otherwise it consumes an unrelated _forceRemove subtree\n         record and that detached subtree escapes the IN_PLACE handler-\n         neutralization pass (SO-001). */\n      let recreatedNamedProp = false;\n      /* Execute a hook if present */\n      hookEvent.attrName = lcName;\n      hookEvent.attrValue = value;\n      hookEvent.keepAttr = true;\n      hookEvent.forceKeepAttr = undefined; // Allows developers to see this is a property they can set\n      _executeHooks(hooks.uponSanitizeAttribute, currentNode, hookEvent);\n      value = hookEvent.attrValue;\n      /* Full DOM Clobbering protection via namespace isolation,\n       * Prefix id and name attributes with `user-content-`\n       */\n      if (SANITIZE_NAMED_PROPS && (lcName === 'id' || lcName === 'name') && stringIndexOf(value, SANITIZE_NAMED_PROPS_PREFIX) !== 0) {\n        // Remove the attribute with this value\n        _removeAttribute(name, currentNode, attr);\n        // Prefix the value and later re-create the attribute with the sanitized value\n        value = SANITIZE_NAMED_PROPS_PREFIX + value;\n        // This attribute owns the record just pushed; its recreate writeback\n        // is the one allowed to pop it back off.\n        recreatedNamedProp = true;\n      }\n      // Else: already prefixed, leave the attribute alone — the prefix is\n      // itself the clobbering protection, and re-applying it is incorrect.\n      /* Work around a security issue with comments inside attributes */\n      if (SAFE_FOR_XML && regExpTest(/((--!?|])>)|<\\/(style|script|title|xmp|textarea|noscript|iframe|noembed|noframes)/i, value)) {\n        _removeAttribute(name, currentNode, attr);\n        continue;\n      }\n      /* Make sure we cannot easily use animated hrefs, even if animations are allowed */\n      if (lcName === 'attributename' && stringMatch(value, 'href')) {\n        _removeAttribute(name, currentNode, attr);\n        continue;\n      }\n      /* Did the hooks force-keep the attribute? */\n      if (hookEvent.forceKeepAttr) {\n        continue;\n      }\n      /* Did the hooks approve of the attribute? */\n      if (!hookEvent.keepAttr) {\n        _removeAttribute(name, currentNode, attr);\n        continue;\n      }\n      /* Work around a security issue in jQuery 3.0 */\n      if (!ALLOW_SELF_CLOSE_IN_ATTR && regExpTest(SELF_CLOSING_TAG, value)) {\n        _removeAttribute(name, currentNode, attr);\n        continue;\n      }\n      /* Sanitize attribute content to be template-safe */\n      if (SAFE_FOR_TEMPLATES) {\n        value = _stripTemplateExpressions(value);\n      }\n      /* Is `value` valid for this attribute? */\n      if (!_isValidAttribute(lcTag, lcName, value)) {\n        _removeAttribute(name, currentNode, attr);\n        continue;\n      }\n      /* Handle attributes that require Trusted Types */\n      value = _applyTrustedTypesToAttribute(lcTag, lcName, namespaceURI, value);\n      /* Handle invalid data-* attribute set by try-catching it */\n      if (value !== initValue) {\n        const cleanWrite = _setAttributeValue(currentNode, name, namespaceURI, value);\n        /* Only the named-prop remove-and-recreate owns a DOMPurify.removed\n           record to pop; a plain trim/template/Trusted-Types writeback owns\n           none, so popping here would drop an unrelated subtree's cleanup\n           record (SO-001). */\n        if (cleanWrite && recreatedNamedProp) {\n          arrayPop(DOMPurify.removed);\n        }\n      }\n    }\n    /* Execute a hook if present */\n    _executeHooks(hooks.afterSanitizeAttributes, currentNode, null);\n  };\n  /**\n   * _sanitizeShadowDOM\n   *\n   * @param fragment to iterate over recursively\n   */\n  const _sanitizeShadowDOM2 = function _sanitizeShadowDOM(fragment) {\n    let shadowNode = null;\n    const shadowIterator = _createNodeIterator(fragment);\n    /* Execute a hook if present */\n    _executeHooks(hooks.beforeSanitizeShadowDOM, fragment, null);\n    while (shadowNode = shadowIterator.nextNode()) {\n      /* Execute a hook if present */\n      _executeHooks(hooks.uponSanitizeShadowNode, shadowNode, null);\n      /* Sanitize tags and elements */\n      _sanitizeElements(shadowNode, fragment);\n      /* Check attributes next */\n      _sanitizeAttributes(shadowNode);\n      /* Deep shadow DOM detected.\n         Realm-safe check (GHSA-hpcv-96wg-7vj8): use nodeType against the\n         DOCUMENT_FRAGMENT_NODE constant rather than instanceof, so we\n         recurse into <template>.content from foreign realms too. */\n      if (_isDocumentFragment(shadowNode.content)) {\n        _sanitizeShadowDOM2(shadowNode.content);\n      }\n      /* An element iterated here may itself host an attached\n         shadow root. The default NodeIterator does not enter shadow\n         trees, so a shadow root nested inside template.content was\n         previously reached by no walk at all (the pre-pass at\n         _sanitizeAttachedShadowRoots descends via childNodes, which\n         doesn't enter template.content; the template-content recursion\n         above iterates the content but never inspected shadowRoot).\n         Walk it explicitly. The nodeType guard avoids reading\n         shadowRoot off text / comment / CDATA / PI nodes that the\n         iterator also surfaces. */\n      if (_readNodeType(shadowNode) === NODE_TYPE.element) {\n        const innerSr = getShadowRoot(shadowNode);\n        if (_isDocumentFragment(innerSr)) {\n          _sanitizeAttachedShadowRoots(innerSr);\n          _sanitizeShadowDOM2(innerSr);\n        }\n      }\n    }\n    /* Execute a hook if present */\n    _executeHooks(hooks.afterSanitizeShadowDOM, fragment, null);\n  };\n  /**\n   * _sanitizeAttachedShadowRoots\n   *\n   * Walks `root` and feeds every attached shadow root we encounter into\n   * the existing _sanitizeShadowDOM pipeline. The default node iterator\n   * does not descend into shadow trees, so nodes inside an attached\n   * shadow root would otherwise be skipped entirely.\n   *\n   * Two real input paths put attached shadow roots in front of us:\n   *   1. IN_PLACE on a DOM node that already has shadow roots attached.\n   *   2. DOM-node input where importNode(dirty, true) deep-clones the\n   *      shadow root because it was created with `clonable: true`.\n   *\n   * This pass runs once, up front, so the main iteration loop (and the\n   * existing _sanitizeShadowDOM template-content recursion) stay\n   * untouched — string-input paths are not affected.\n   *\n   * @param root the subtree root to walk for attached shadow roots\n   */\n  const _sanitizeAttachedShadowRoots = function _sanitizeAttachedShadowRoots(root) {\n    /* Iterative (explicit stack) rather than per-child recursion. DOM APIs\n       impose no depth cap, so an attacker-shaped tree (JSON/CRDT/editor data\n       built straight into the DOM — the IN_PLACE surface) deeper than the JS\n       call-stack budget would otherwise overflow native recursion here and\n       throw at the IN_PLACE entry pre-pass, before a single node is\n       sanitized, leaving the caller's live tree untouched (fail-open). See\n       campaign-3 F4. A heap stack keeps depth off the call stack.\n            Each work item is either a node to descend into, or a deferred\n       `_sanitizeShadowDOM` for an already-walked shadow root. The deferred\n       form preserves the original post-order discipline: a shadow root's\n       nested shadow roots are discovered before the outer shadow is\n       sanitized (which may remove hosts). Pushes are in reverse of the\n       desired processing order (LIFO): template content, then children, then\n       the shadow-sanitize, then the shadow walk — so the order matches the\n       previous recursion exactly. */\n    const stack = [{\n      node: root,\n      shadow: null\n    }];\n    while (stack.length > 0) {\n      const item = stack.pop();\n      /* Deferred shadow-DOM sanitisation: runs after its subtree was walked. */\n      if (item.shadow) {\n        _sanitizeShadowDOM2(item.shadow);\n        continue;\n      }\n      const node = item.node;\n      const nodeType = _readNodeType(node);\n      const isElement = nodeType === NODE_TYPE.element;\n      /* (pushed last → processed first) Children, snapshotted in reverse so\n         the first child is processed first. Snapshotting matters because a\n         hook may detach siblings mid-walk. */\n      const childNodes = getChildNodes(node);\n      if (childNodes) {\n        for (let i = childNodes.length - 1; i >= 0; --i) {\n          stack.push({\n            node: childNodes[i],\n            shadow: null\n          });\n        }\n      }\n      /* (pushed before children → processed after them, matching the old\n         \"template content last\" order) When the node is a <template>,\n         descend into its content. */\n      if (isElement) {\n        const rootName = getNodeName ? getNodeName(node) : null;\n        if (typeof rootName === 'string' && transformCaseFunc(rootName) === 'template') {\n          const content = node.content;\n          if (_isDocumentFragment(content)) {\n            stack.push({\n              node: content,\n              shadow: null\n            });\n          }\n        }\n      }\n      /* Shadow root (processed first): walk its subtree, then sanitise it.\n         Realm-safe check (GHSA-hpcv-96wg-7vj8): nodeType-based detection\n         rather than `instanceof DocumentFragment`, which is realm-bound and\n         silently skipped foreign-realm shadow roots (e.g.\n         iframe.contentDocument attachShadow). */\n      if (isElement) {\n        const sr = getShadowRoot(node);\n        if (_isDocumentFragment(sr)) {\n          /* Push the deferred sanitise first so it pops after the shadow\n             walk we push next, i.e. nested shadow roots are discovered\n             before this one is sanitised. */\n          stack.push({\n            node: null,\n            shadow: sr\n          }, {\n            node: sr,\n            shadow: null\n          });\n        }\n      }\n    }\n  };\n  // eslint-disable-next-line complexity\n  DOMPurify.sanitize = function (dirty) {\n    let cfg = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {};\n    let body = null;\n    let importedNode = null;\n    let currentNode = null;\n    let returnNode = null;\n    /* Make sure we have a string to sanitize.\n      DO NOT return early, as this will return the wrong type if\n      the user has requested a DOM object rather than a string */\n    IS_EMPTY_INPUT = !dirty;\n    if (IS_EMPTY_INPUT) {\n      dirty = '<!-->';\n    }\n    /* Stringify, in case dirty is an object */\n    if (typeof dirty !== 'string' && !_isNode(dirty)) {\n      dirty = stringifyValue(dirty);\n      if (typeof dirty !== 'string') {\n        throw typeErrorCreate('dirty is not a string, aborting');\n      }\n    }\n    /* Return dirty HTML if DOMPurify cannot run */\n    if (!DOMPurify.isSupported) {\n      return dirty;\n    }\n    /* Assign config vars */\n    if (SET_CONFIG) {\n      /* Persistent setConfig() path: _parseConfig is skipped, so the sets are\n       * not re-derived per call. Restore them from the pristine bindings\n       * captured at setConfig() time so a previous call's hook clone (mutated\n       * below) does not carry over. */\n      ALLOWED_TAGS = SET_CONFIG_ALLOWED_TAGS;\n      ALLOWED_ATTR = SET_CONFIG_ALLOWED_ATTR;\n    } else {\n      _parseConfig(cfg);\n    }\n    /* Clone the hook-mutable allowlists before the walk whenever an\n     * uponSanitize* hook is registered. The hook event exposes ALLOWED_TAGS\n     * and ALLOWED_ATTR by reference (as allowedTags / allowedAttributes), so\n     * a hook that widens them would otherwise mutate the shared set\n     * permanently: across later calls and across every element. Cloning per\n     * walk keeps documented in-call widening working while scoping it to the\n     * call. A single guard for both config paths - the per-call path rebinds\n     * the sets in _parseConfig each call, the persistent path restores them\n     * from the captured bindings just above - so the two cannot diverge. */\n    if (hooks.uponSanitizeElement.length > 0 || hooks.uponSanitizeAttribute.length > 0) {\n      ALLOWED_TAGS = clone(ALLOWED_TAGS);\n    }\n    if (hooks.uponSanitizeAttribute.length > 0) {\n      ALLOWED_ATTR = clone(ALLOWED_ATTR);\n    }\n    /* Clean up removed elements */\n    DOMPurify.removed = [];\n    /* Resolve IN_PLACE for this call without mutating persistent config.\n       Writing the IN_PLACE closure variable here leaks under setConfig(),\n       where _parseConfig is skipped on later calls: a single string call would\n       disable in-place mode for every subsequent node call, returning a\n       sanitized copy while leaving the caller's node — which in-place callers\n       keep using and whose return value they ignore — unsanitized. REPORT-2. */\n    const inPlace = IN_PLACE && typeof dirty !== 'string' && _isNode(dirty);\n    if (inPlace) {\n      /* Declarative-partial-updates / streaming pre-pass: sever every patch\n         linkage across the live tree BEFORE the walk, so no patch can fire\n         mid-walk and inject into an already-processed region. Runs first, so\n         it also covers the forbidden/clobbered roots that throw below. */\n      _neutralizePatchLinkage(dirty);\n      /* Do some early pre-sanitization to avoid unsafe root nodes.\n         Read nodeName through the cached prototype getter — a clobbering\n         child named \"nodeName\" on the form root would otherwise shadow\n         the property and let this check skip the root-allowlist\n         validation entirely. */\n      const nn = _readNodeName(dirty);\n      if (typeof nn === 'string') {\n        const tagName = transformCaseFunc(nn);\n        if (!ALLOWED_TAGS[tagName] || FORBID_TAGS[tagName]) {\n          /* Fail closed on a live root: neutralize handlers/children before\n             throwing, exactly as the mid-walk abort path does. */\n          _neutralizeRoot(dirty);\n          throw typeErrorCreate('root node is forbidden and cannot be sanitized in-place');\n        }\n      }\n      /* Pre-flight the root through _isClobbered. The iterator-driven\n         removal path can not detach a parent-less root: _forceRemove\n         falls through to Element.prototype.remove(), which per spec\n         is a no-op on a node with no parent. A clobbered root would\n         then survive the main loop with its attributes uninspected,\n         because _sanitizeAttributes early-returns on _isClobbered. The\n         result would be an attacker-controlled form, complete with any\n         event-handler attributes the caller passed in, handed back to\n         the application unsanitized. Refuse to sanitize such a root\n         the same way we refuse a forbidden tag. GHSA-r47g-fvhr-h676. */\n      if (_isClobbered(dirty)) {\n        /* Fail closed on a live clobbered root before throwing.\n           _neutralizeRoot's reads are clobber-safe (cached getters); the\n           form's non-clobbered descendants, e.g. an armed <img>, are scrubbed. */\n        _neutralizeRoot(dirty);\n        throw typeErrorCreate('root node is clobbered and cannot be sanitized in-place');\n      }\n      /* Sanitize attached shadow roots before the main iterator runs.\n         The iterator does not descend into shadow trees. Same fail-closed\n         barrier as the main walk (campaign-3 F2): a custom-element reaction\n         inside a shadow root could abort this pre-pass before the walk runs,\n         which would otherwise leave the entire live tree unsanitized. */\n      try {\n        _sanitizeAttachedShadowRoots(dirty);\n      } catch (error) {\n        _neutralizeRoot(dirty);\n        throw error;\n      }\n    } else if (_isNode(dirty)) {\n      /* If dirty is a DOM element, append to an empty document to avoid\n         elements being stripped by the parser */\n      body = _initDocument('<!---->');\n      importedNode = body.ownerDocument.importNode(dirty, true);\n      if (importedNode.nodeType === NODE_TYPE.element && importedNode.nodeName === 'BODY') {\n        /* Node is already a body, use as is */\n        body = importedNode;\n      } else if (importedNode.nodeName === 'HTML') {\n        body = importedNode;\n      } else {\n        // eslint-disable-next-line unicorn/prefer-dom-node-append\n        body.appendChild(importedNode);\n      }\n      /* Clonable shadow roots are deep-cloned by importNode(); sanitize\n         them before the main iterator runs, since the iterator does not\n         descend into shadow trees. The walk routes every read through a\n         cached prototype getter so clobbering descendants on a form root\n         cannot hide a shadow host from this pass.\n                Traverse from `body`, not `importedNode`: when importedNode is a\n         DocumentFragment, the appendChild() above moves its children into\n         `body` and leaves the fragment empty, so walking importedNode would\n         scan nothing and miss every attached shadow host now under `body`\n         (SO-003). In the BODY/HTML branches `body === importedNode`, so this\n         is equivalent there; in the element branch `body` contains the\n         appended element and its descendants. `body` covers all three. */\n      _sanitizeAttachedShadowRoots(body);\n    } else {\n      /* Exit directly if we have nothing to do */\n      if (!RETURN_DOM && !SAFE_FOR_TEMPLATES && !WHOLE_DOCUMENT &&\n      // eslint-disable-next-line unicorn/prefer-includes\n      dirty.indexOf('<') === -1) {\n        return trustedTypesPolicy && RETURN_TRUSTED_TYPE ? _createTrustedHTML(dirty) : dirty;\n      }\n      /* Initialize the document to work on */\n      body = _initDocument(dirty);\n      /* Check we have a DOM node from the data */\n      if (!body) {\n        return RETURN_DOM ? null : RETURN_TRUSTED_TYPE ? emptyHTML : '';\n      }\n    }\n    /* Remove first element node (ours) if FORCE_BODY is set */\n    if (body && FORCE_BODY) {\n      _forceRemove(body.firstChild);\n    }\n    /* Get node iterator */\n    const walkRoot = inPlace ? dirty : body;\n    /* Now start iterating over the created document.\n       The walk runs inside an exception barrier (campaign-3 F2): a re-entrant\n       engine/custom-element mutation can detach a node mid-walk so\n       `_forceRemove`'s parentless guard throws, aborting the loop. Without the\n       barrier the caller's in-place tree would be left half-sanitized with the\n       unvisited tail still armed. _createNodeIterator itself is inside the\n       barrier too: constructing the iterator dereferences the root's document,\n       and any failure there (e.g. an exotic/clobbered root) must still fail\n       closed rather than skip the neutralize. On any throw we fail closed -\n       strip the in-place root bare - then rethrow so the existing throw\n       contract is preserved. (String/DOM-copy paths never return the partial\n       body, so the propagating throw is already fail-closed there.) */\n    try {\n      const nodeIterator = _createNodeIterator(walkRoot);\n      while (currentNode = nodeIterator.nextNode()) {\n        /* Sanitize tags and elements */\n        _sanitizeElements(currentNode, walkRoot);\n        /* Check attributes next */\n        _sanitizeAttributes(currentNode);\n        /* Shadow DOM detected, sanitize it.\n           Realm-safe check (GHSA-hpcv-96wg-7vj8): nodeType-based detection\n           instead of instanceof, so foreign-realm <template>.content is\n           walked correctly. */\n        if (_isDocumentFragment(currentNode.content)) {\n          _sanitizeShadowDOM2(currentNode.content);\n        }\n      }\n    } catch (error) {\n      if (inPlace) {\n        _neutralizeRoot(dirty);\n        /* Nodes _forceRemove'd earlier in the aborted walk are already\n           detached from the root, so _neutralizeRoot's subtree pass does not\n           reach them. Defuse them too, mirroring the success-path loop below. */\n        arrayForEach(DOMPurify.removed, entry => {\n          if (entry.element) {\n            _neutralizeSubtree(entry.element);\n          }\n        });\n      }\n      throw error;\n    }\n    /* If we sanitized `dirty` in-place, return it. */\n    if (inPlace) {\n      /* Fail-closed completion of the audit-5 F1 fix: every node removed from\n         the caller's live tree is detached but may still hold a queued\n         resource-event handler that fires in page scope after we return. The\n         move-hoist covers only disallowed-tag KEEP_CONTENT removals; strip the\n         non-allow-listed attributes off every other removed subtree (clobber,\n         mXSS, namespace, comments, KEEP_CONTENT:false, …) so those handlers are\n         cancelled before any event can fire. Runs synchronously, pre-return. */\n      arrayForEach(DOMPurify.removed, entry => {\n        if (entry.element) {\n          _neutralizeSubtree(entry.element);\n        }\n      });\n      if (SAFE_FOR_TEMPLATES) {\n        _scrubTemplateExpressions2(dirty);\n      }\n      return dirty;\n    }\n    /* Return sanitized string or DOM */\n    if (RETURN_DOM) {\n      if (SAFE_FOR_TEMPLATES) {\n        _scrubTemplateExpressions2(body);\n      }\n      if (RETURN_DOM_FRAGMENT) {\n        returnNode = createDocumentFragment.call(body.ownerDocument);\n        while (body.firstChild) {\n          // eslint-disable-next-line unicorn/prefer-dom-node-append\n          returnNode.appendChild(body.firstChild);\n        }\n      } else {\n        returnNode = body;\n      }\n      if (ALLOWED_ATTR.shadowroot || ALLOWED_ATTR.shadowrootmode) {\n        /*\n          AdoptNode() is not used because internal state is not reset\n          (e.g. the past names map of a HTMLFormElement), this is safe\n          in theory but we would rather not risk another attack vector.\n          The state that is cloned by importNode() is explicitly defined\n          by the specs.\n        */\n        returnNode = importNode.call(originalDocument, returnNode, true);\n      }\n      return returnNode;\n    }\n    let serializedHTML = WHOLE_DOCUMENT ? body.outerHTML : body.innerHTML;\n    /* Serialize doctype if allowed */\n    if (WHOLE_DOCUMENT && ALLOWED_TAGS['!doctype'] && body.ownerDocument && body.ownerDocument.doctype && body.ownerDocument.doctype.name && regExpTest(DOCTYPE_NAME, body.ownerDocument.doctype.name)) {\n      serializedHTML = '<!DOCTYPE ' + body.ownerDocument.doctype.name + '>\\n' + serializedHTML;\n    }\n    /* Sanitize final string template-safe */\n    if (SAFE_FOR_TEMPLATES) {\n      serializedHTML = _stripTemplateExpressions(serializedHTML);\n    }\n    return trustedTypesPolicy && RETURN_TRUSTED_TYPE ? _createTrustedHTML(serializedHTML) : serializedHTML;\n  };\n  DOMPurify.setConfig = function () {\n    let cfg = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : {};\n    _parseConfig(cfg);\n    SET_CONFIG = true;\n    SET_CONFIG_ALLOWED_TAGS = ALLOWED_TAGS;\n    SET_CONFIG_ALLOWED_ATTR = ALLOWED_ATTR;\n  };\n  DOMPurify.clearConfig = function () {\n    CONFIG = null;\n    SET_CONFIG = false;\n    SET_CONFIG_ALLOWED_TAGS = null;\n    SET_CONFIG_ALLOWED_ATTR = null;\n    // Drop any caller-supplied Trusted Types policy so it cannot poison later\n    // `RETURN_TRUSTED_TYPE` output. The internal default policy (cached, and\n    // never recreated — Trusted Types throws on duplicate names) is restored by\n    // the next `_parseConfig`. See GHSA-vxr8-fq34-vvx9.\n    trustedTypesPolicy = defaultTrustedTypesPolicy;\n    emptyHTML = '';\n  };\n  DOMPurify.isValidAttribute = function (tag, attr, value) {\n    /* Initialize shared config vars if necessary. */\n    if (!CONFIG) {\n      _parseConfig({});\n    }\n    const lcTag = transformCaseFunc(tag);\n    const lcName = transformCaseFunc(attr);\n    return _isValidAttribute(lcTag, lcName, value);\n  };\n  DOMPurify.addHook = function (entryPoint, hookFunction) {\n    if (typeof hookFunction !== 'function') {\n      return;\n    }\n    /* Reject unknown entry points. Without this, a non-hook key (e.g.\n     * '__proto__') indexes off the prototype chain rather than a real\n     * hook array, and arrayPush then writes to Object.prototype. Guard\n     * with an own-property check against the known hook names. */\n    if (!objectHasOwnProperty(hooks, entryPoint)) {\n      return;\n    }\n    arrayPush(hooks[entryPoint], hookFunction);\n  };\n  DOMPurify.removeHook = function (entryPoint, hookFunction) {\n    if (!objectHasOwnProperty(hooks, entryPoint)) {\n      return undefined;\n    }\n    if (hookFunction !== undefined) {\n      const index = arrayLastIndexOf(hooks[entryPoint], hookFunction);\n      return index === -1 ? undefined : arraySplice(hooks[entryPoint], index, 1)[0];\n    }\n    return arrayPop(hooks[entryPoint]);\n  };\n  DOMPurify.removeHooks = function (entryPoint) {\n    if (!objectHasOwnProperty(hooks, entryPoint)) {\n      return;\n    }\n    hooks[entryPoint] = [];\n  };\n  DOMPurify.removeAllHooks = function () {\n    hooks = _createHooksMap();\n  };\n  return DOMPurify;\n}\nvar purify = createDOMPurify();\n\nexport { purify as default };\n//# sourceMappingURL=purify.es.mjs.map\n","/**\n * SPDX-License-Identifier: AGPL-3.0-or-later\n * Copyright (c) 2026 Jacob Bühler\n */\nimport DOMPurify from 'dompurify'\n\n/**\n * Client-side defense-in-depth for pad HTML.\n *\n * The HTML is sanitized server-side already, but it comes from a pad\n * server this app does not own and the viewer injects it via `innerHTML`,\n * so the same allowlist is enforced again here — a regression in the\n * server gate then cannot become XSS.\n *\n * Mirrors `SnapshotHtmlSanitizer::ALLOWED_TAGS` and its link rule.\n */\nconst ALLOWED_TAGS = [\n\t'p', 'br',\n\t'ul', 'ol', 'li',\n\t'h1', 'h2', 'h3', 'h4', 'h5', 'h6',\n\t'strong', 'b', 'em', 'i', 'u', 's', 'del',\n\t'blockquote', 'pre', 'code',\n\t'a',\n]\n\n/** Mirrors `SnapshotHtmlSanitizer::ALLOWED_LINK_SCHEMES`. */\nconst ALLOWED_URI_REGEXP = /^(?:https?|mailto):/i\n\n/**\n * Set here rather than trusted from the server pass: a link arriving\n * without them still cannot hand the opened tab a reference back.\n */\nDOMPurify.addHook('afterSanitizeAttributes', (node) => {\n\tif (node.tagName !== 'A') {\n\t\treturn\n\t}\n\tif (!node.hasAttribute('href')) {\n\t\t// The href was refused, so this is no longer a link. The server\n\t\t// stage unwraps it to plain text; leaving an empty `<a>` shell here\n\t\t// would be the two stages disagreeing about the same input.\n\t\tnode.replaceWith(...node.childNodes)\n\t\treturn\n\t}\n\tnode.setAttribute('target', '_blank')\n\tnode.setAttribute('rel', 'noopener noreferrer')\n})\n\n/**\n * @param {unknown} html\n * @return {string} sanitized HTML safe to assign to innerHTML\n */\nexport function sanitizeSnapshotHtml(html) {\n\treturn DOMPurify.sanitize(String(html ?? ''), {\n\t\tALLOWED_TAGS,\n\t\t// `href` only. `target` and `rel` are deliberately absent: DOMPurify\n\t\t// matches their values against ALLOWED_URI_REGEXP and would strip\n\t\t// them anyway, so listing them would read as though the server's\n\t\t// values pass through. The hook above sets them instead.\n\t\tALLOWED_ATTR: ['href'],\n\t\tALLOWED_URI_REGEXP,\n\t\tALLOW_DATA_ATTR: false,\n\t})\n}\n","/**\n * SPDX-License-Identifier: AGPL-3.0-or-later\n * Copyright (c) 2026 Jacob Bühler\n */\nimport { fetchJsonWithTimeout } from './fetch-helpers.js'\nimport { sanitizeSnapshotHtml } from './sanitize-html.js'\n\n/** Longer than the server's own 20s budget, so we cannot time out first. */\nconst CONTENT_TIMEOUT_MS = 25000\n\n/**\n * Loads the current pad content for a read-only view.\n *\n * @param {string} contentUrl endpoint from the open response\n * @param {{signal?: AbortSignal}} options\n * @return {Promise<{html: string, isEmpty: boolean}>}\n */\nexport const loadPadContent = async (contentUrl, { signal } = {}) => {\n\tconst data = await fetchJsonWithTimeout(\n\t\tcontentUrl,\n\t\t{ method: 'GET', signal },\n\t\t{ timeoutMs: CONTENT_TIMEOUT_MS, fallbackMessage: 'Could not load the pad content.' },\n\t)\n\n\t// The failure this catches looks exactly like success: a login page or\n\t// a maintenance notice answered with HTTP 200 carries no `html`, and a\n\t// missing field read as `''` would be shown as an empty pad.\n\tif (!data || typeof data !== 'object' || typeof data.html !== 'string' || typeof data.is_empty !== 'boolean') {\n\t\tthrow new Error('Could not load the pad content.')\n\t}\n\n\tconst html = sanitizeSnapshotHtml(data.html)\n\n\treturn {\n\t\thtml,\n\t\t// The server's verdict — Etherpad answers an untouched pad with\n\t\t// markup, so the string alone cannot say — plus the case it cannot\n\t\t// see, a sanitizer that empties what it was given.\n\t\tisEmpty: data.is_empty || html.trim() === '',\n\t}\n}\n","/**\n * SPDX-License-Identifier: AGPL-3.0-or-later\n * Copyright (c) 2026 Jacob Bühler\n */\n\n/**\n * A floor, and the largest delay `setInterval` can hold - a signed 32-bit\n * one, past which it wraps and fires almost at once. The upper bound is\n * the timer's limit, not an opinion on how often to sync: capping a long\n * interval would make the client call home more often than it was asked\n * to.\n */\nconst MIN_INTERVAL_MS = 5000\nconst MAX_TIMER_MS = 2147483647\nconst DEFAULT_INTERVAL_MS = 120000\n\n/**\n * The code, not the message: the wording is translated and reworded.\n *\n * @param {unknown} error\n * @return {boolean}\n */\nexport const isMissingFrontmatterError = (error) => Boolean(error) && error.code === 'missing_frontmatter'\n\n/**\n * The file has no pad here: the clients offer to recover one.\n *\n * @param {unknown} error\n * @return {boolean}\n */\nexport const isMissingBindingError = (error) => Boolean(error) && error.code === 'missing_binding'\n\n/**\n * Whether the same open may work later, so a client offers to try it\n * again: the server said so (`retryable`), the file changed while it was\n * being initialised (the server undid its part), or no answer came.\n *\n * Also after an initialise that got no answer: the second try opens\n * first, and finds the pad if the first initialise set it up. One still\n * running is safe to meet, since the server compares the file before it\n * writes, a file has one binding row, and a pad that lost either race is\n * rolled back.\n *\n * @param {unknown} error\n * @return {boolean}\n */\nexport const isRetryableOpenError = (error) => Boolean(error)\n\t&& (error.retryable === true || error.code === 'pad_file_changed' || error.unanswered === true)\n\n/**\n * A read-only view carries no pad URL by design; anything else without one\n * would reach an iframe as `undefined`.\n *\n * @param {any} data\n * @return {any}\n */\nexport const assertOpenPayload = (data) => {\n\tif (!data || (data.is_readonly_view !== true && padUrlFrom(data) === '')) {\n\t\tthrow new Error('Pad open API did not return a valid URL.')\n\t}\n\treturn data\n}\n\n/**\n * @param {any} data\n * @return {string}\n */\nexport const padUrlFrom = (data) => ((data && typeof data.url === 'string') ? data.url.trim() : '')\n\n/**\n * Open a pad, bootstrapping the file first if it has none yet.\n *\n * @param {object} steps\n * @param {() => Promise<any>} steps.open\n * @param {() => Promise<any>} steps.initialize\n * @param {() => boolean} [steps.stillWanted] asked once, after initialising\n * @return {Promise<any>} the payload; null only when a supplied\n *   `stillWanted` returns false\n */\nexport const openWithFrontmatterRecovery = async ({ open, initialize, stillWanted = () => true }) => {\n\ttry {\n\t\treturn await open()\n\t} catch (error) {\n\t\tif (!isMissingFrontmatterError(error)) {\n\t\t\tthrow error\n\t\t}\n\t\t// Not abortable: it creates a pad, writes a binding row and\n\t\t// rewrites the file.\n\t\tawait initialize()\n\t\t// The open after it mints a session and a cookie, so a caller that\n\t\t// has moved on should not pay for one.\n\t\tif (!stillWanted()) {\n\t\t\treturn null\n\t\t}\n\t\treturn await open()\n\t}\n}\n\n/**\n * @param {any} data\n * @return {{syncUrl: string, intervalMs: number}}\n */\nexport const syncSettingsFrom = (data) => {\n\tconst seconds = Number(data && data.sync_interval_seconds)\n\treturn {\n\t\tsyncUrl: (data && typeof data.sync_url === 'string') ? data.sync_url.trim() : '',\n\t\tintervalMs: (Number.isFinite(seconds) && seconds > 0)\n\t\t\t? Math.min(MAX_TIMER_MS, Math.max(MIN_INTERVAL_MS, seconds * 1000))\n\t\t\t: DEFAULT_INTERVAL_MS,\n\t}\n}\n\n/**\n * @param {any} data\n * @return {string}\n */\nexport const contentUrlFrom = (data) => ((data && typeof data.content_url === 'string') ? data.content_url.trim() : '')\n\n/**\n * Whether one of our own views draws this pad, and what it may link to. A\n * read-only view draws a pad the reader may not reach directly, so it has\n * no original to offer; only an external pad carries a link.\n *\n * @param {any} data\n * @return {{isContentView: boolean, externalUrl: string}}\n */\nexport const contentViewFrom = (data) => {\n\tconst isReadOnly = Boolean(data && data.is_readonly_view === true)\n\tconst url = padUrlFrom(data)\n\tconst isExternal = Boolean(data && data.is_external === true) && url !== ''\n\treturn {\n\t\tisContentView: isReadOnly || isExternal,\n\t\texternalUrl: (isExternal && !isReadOnly) ? url : 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\ No newline at end of file
+{"version":3,"file":"pad-open-flow-By_FzSKk.chunk.mjs","sources":["../src/lib/pad-sync.js","../src/lib/hand-focus.js","../node_modules/dompurify/dist/purify.es.mjs","../src/lib/sanitize-html.js","../src/lib/pad-content.js","../src/lib/pad-open-flow.js"],"sourcesContent":["/**\n * SPDX-License-Identifier: AGPL-3.0-or-later\n * Copyright (c) 2026 Jacob Bühler\n */\n\n/**\n * Shared pad-sync loop for the viewer and embed entrypoints.\n *\n * Owns the periodic background sync, forced/keepalive flushes, and the\n * visibility/pagehide lifecycle wiring. Forced syncs coalesce: while one\n * request is in flight a second forced flush is not started concurrently but\n * remembered and replayed once, so two forced flushes can never overlap (this\n * is the embed behavior, now shared — the viewer previously used a plain\n * in-flight boolean that allowed overlap).\n *\n * The caller supplies the request-token getter (the viewer and embed read it\n * from different places) and may inject a `fetchImpl` for tests.\n */\n\nexport const DEFAULT_SYNC_INTERVAL_MS = 120000\n\nexport function createPadSync({ requestToken, fetchImpl } = {}) {\n\tconst doFetch = typeof fetchImpl === 'function' ? fetchImpl : (...args) => window.fetch(...args)\n\tconst getToken = typeof requestToken === 'function' ? requestToken : () => ''\n\n\tlet syncUrl = ''\n\tlet intervalMs = DEFAULT_SYNC_INTERVAL_MS\n\tlet syncPromise = null\n\tlet activeSyncForce = false\n\tlet pendingForcedSync = false\n\tlet pendingForcedKeepalive = false\n\tlet timerId = null\n\tlet visibilityHandler = null\n\tlet pageHideHandler = null\n\n\tconst configure = ({ syncUrl: url, intervalMs: ms } = {}) => {\n\t\tif (typeof url === 'string') {\n\t\t\tsyncUrl = url\n\t\t}\n\t\tif (Number.isFinite(ms) && ms > 0) {\n\t\t\tintervalMs = ms\n\t\t}\n\t}\n\n\tconst stop = () => {\n\t\tif (timerId !== null) {\n\t\t\twindow.clearInterval(timerId)\n\t\t\ttimerId = null\n\t\t}\n\t}\n\n\tconst start = () => {\n\t\tif (!syncUrl || timerId !== null) {\n\t\t\treturn\n\t\t}\n\t\ttimerId = window.setInterval(() => {\n\t\t\tif (document.visibilityState === 'visible') {\n\t\t\t\tfireAndForget(false, false)\n\t\t\t}\n\t\t}, intervalMs)\n\t}\n\n\tconst fireAndForget = (force, keepalive) => {\n\t\tvoid sync(force, keepalive).catch(() => {})\n\t}\n\n\tconst sync = async (force, keepalive) => {\n\t\tif (!syncUrl) {\n\t\t\treturn { status: 'disabled' }\n\t\t}\n\t\tif (syncPromise) {\n\t\t\t// A request is already running. A forced flush that arrives while a\n\t\t\t// non-forced sync is in flight is coalesced into a single replay.\n\t\t\tif (force && !activeSyncForce) {\n\t\t\t\tpendingForcedSync = true\n\t\t\t\tpendingForcedKeepalive = pendingForcedKeepalive || Boolean(keepalive)\n\t\t\t\treturn syncPromise.catch(() => undefined).then(() => sync(true, pendingForcedKeepalive))\n\t\t\t}\n\t\t\treturn syncPromise\n\t\t}\n\t\tactiveSyncForce = Boolean(force)\n\t\tconst currentPromise = (async () => {\n\t\t\tconst url = force ? (syncUrl + (syncUrl.includes('?') ? '&' : '?') + 'force=1') : syncUrl\n\t\t\tconst response = await doFetch(url, {\n\t\t\t\tmethod: 'POST',\n\t\t\t\tcredentials: 'same-origin',\n\t\t\t\theaders: {\n\t\t\t\t\tAccept: 'application/json',\n\t\t\t\t\trequesttoken: getToken(),\n\t\t\t\t},\n\t\t\t\tkeepalive: Boolean(keepalive),\n\t\t\t})\n\t\t\tconst data = await response.json().catch(() => ({}))\n\t\t\tif (!response.ok) {\n\t\t\t\tthrow new Error((data && data.message) || 'Sync request failed.')\n\t\t\t}\n\t\t\treturn data\n\t\t})()\n\t\tsyncPromise = currentPromise\n\t\tlet result\n\t\tlet syncError = null\n\t\ttry {\n\t\t\tresult = await currentPromise\n\t\t} catch (error) {\n\t\t\tsyncError = error\n\t\t} finally {\n\t\t\tif (syncPromise === currentPromise) {\n\t\t\t\tsyncPromise = null\n\t\t\t}\n\t\t\tactiveSyncForce = false\n\t\t}\n\t\tconst rerunForcedSync = pendingForcedSync\n\t\tconst rerunKeepalive = pendingForcedKeepalive\n\t\tpendingForcedSync = false\n\t\tpendingForcedKeepalive = false\n\t\tif (rerunForcedSync) {\n\t\t\treturn sync(true, rerunKeepalive)\n\t\t}\n\t\tif (syncError instanceof Error) {\n\t\t\tthrow syncError\n\t\t}\n\t\treturn result\n\t}\n\n\tconst installLifecycleHandlers = () => {\n\t\tif (visibilityHandler || pageHideHandler) {\n\t\t\treturn\n\t\t}\n\t\tvisibilityHandler = () => {\n\t\t\tif (document.visibilityState === 'hidden') {\n\t\t\t\tfireAndForget(true, true)\n\t\t\t\tstop()\n\t\t\t\treturn\n\t\t\t}\n\t\t\tstart()\n\t\t}\n\t\tpageHideHandler = () => {\n\t\t\tfireAndForget(true, true)\n\t\t\tstop()\n\t\t}\n\t\tdocument.addEventListener('visibilitychange', visibilityHandler)\n\t\twindow.addEventListener('pagehide', pageHideHandler)\n\t}\n\n\tconst removeLifecycleHandlers = () => {\n\t\tif (visibilityHandler) {\n\t\t\tdocument.removeEventListener('visibilitychange', visibilityHandler)\n\t\t\tvisibilityHandler = null\n\t\t}\n\t\tif (pageHideHandler) {\n\t\t\twindow.removeEventListener('pagehide', pageHideHandler)\n\t\t\tpageHideHandler = null\n\t\t}\n\t}\n\n\treturn {\n\t\tconfigure,\n\t\tstart,\n\t\tstop,\n\t\tsync,\n\t\tfireAndForget,\n\t\tinstallLifecycleHandlers,\n\t\tremoveLifecycleHandlers,\n\t}\n}\n","/**\n * SPDX-License-Identifier: AGPL-3.0-or-later\n * Copyright (c) 2026 Jacob Bühler\n */\n\n/**\n * After a click whose button went away with the focus on it - a second\n * try, a recovery - the first action in `actionsScope`, or else the\n * message, takes the focus, so a keyboard or screen reader keeps its\n * place (docs/architecture.md, \"Errors of the API\").\n *\n * @param {Element|null|undefined} actionsScope where the new actions are\n * @param {Element|null|undefined} messageNode what to focus without one\n * @param {{preventScroll?: boolean}} [options] the embed page sits in\n *   another page, which must not scroll to it\n */\nexport const handFocusTo = (actionsScope, messageNode, { preventScroll = false } = {}) => {\n\tconst action = actionsScope instanceof HTMLElement ? actionsScope.querySelector('a, button') : null\n\tconst target = action || messageNode\n\tif (!(target instanceof HTMLElement)) {\n\t\treturn\n\t}\n\tif (target === messageNode) {\n\t\t// A paragraph takes the focus only with a tabindex.\n\t\ttarget.tabIndex = -1\n\t}\n\ttarget.focus({ preventScroll })\n}\n","/*! @license DOMPurify 3.4.15 | (c) Cure53 and other contributors | Released under the Apache license 2.0 and Mozilla Public License 2.0 | github.com/cure53/DOMPurify/blob/3.4.15/LICENSE */\n\nfunction _arrayLikeToArray(r, a) {\n  (null == a || a > r.length) && (a = r.length);\n  for (var e = 0, n = Array(a); e < a; e++) n[e] = r[e];\n  return n;\n}\nfunction _arrayWithHoles(r) {\n  if (Array.isArray(r)) return r;\n}\nfunction _iterableToArrayLimit(r, l) {\n  var t = null == r ? null : \"undefined\" != typeof Symbol && r[Symbol.iterator] || r[\"@@iterator\"];\n  if (null != t) {\n    var e,\n      n,\n      i,\n      u,\n      a = [],\n      f = true,\n      o = false;\n    try {\n      if (i = (t = t.call(r)).next, 0 === l) ; else for (; !(f = (e = i.call(t)).done) && (a.push(e.value), a.length !== l); f = !0);\n    } catch (r) {\n      o = true, n = r;\n    } finally {\n      try {\n        if (!f && null != t.return && (u = t.return(), Object(u) !== u)) return;\n      } finally {\n        if (o) throw n;\n      }\n    }\n    return a;\n  }\n}\nfunction _nonIterableRest() {\n  throw new TypeError(\"Invalid attempt to destructure non-iterable instance.\\nIn order to be iterable, non-array objects must have a [Symbol.iterator]() method.\");\n}\nfunction _slicedToArray(r, e) {\n  return _arrayWithHoles(r) || _iterableToArrayLimit(r, e) || _unsupportedIterableToArray(r, e) || _nonIterableRest();\n}\nfunction _unsupportedIterableToArray(r, a) {\n  if (r) {\n    if (\"string\" == typeof r) return _arrayLikeToArray(r, a);\n    var t = {}.toString.call(r).slice(8, -1);\n    return \"Object\" === t && r.constructor && (t = r.constructor.name), \"Map\" === t || \"Set\" === t ? Array.from(r) : \"Arguments\" === t || /^(?:Ui|I)nt(?:8|16|32)(?:Clamped)?Array$/.test(t) ? _arrayLikeToArray(r, a) : void 0;\n  }\n}\n\nconst entries = Object.entries,\n  setPrototypeOf = Object.setPrototypeOf,\n  isFrozen = Object.isFrozen,\n  getPrototypeOf = Object.getPrototypeOf,\n  getOwnPropertyDescriptor = Object.getOwnPropertyDescriptor;\nlet freeze = Object.freeze,\n  seal = Object.seal,\n  create = Object.create; // eslint-disable-line import/no-mutable-exports\nlet _ref = typeof Reflect !== 'undefined' && Reflect,\n  apply = _ref.apply,\n  construct = _ref.construct;\nif (!freeze) {\n  freeze = function freeze(x) {\n    return x;\n  };\n}\nif (!seal) {\n  seal = function seal(x) {\n    return x;\n  };\n}\nif (!apply) {\n  apply = function apply(func, thisArg) {\n    for (var _len = arguments.length, args = new Array(_len > 2 ? _len - 2 : 0), _key = 2; _key < _len; _key++) {\n      args[_key - 2] = arguments[_key];\n    }\n    return func.apply(thisArg, args);\n  };\n}\nif (!construct) {\n  construct = function construct(Func) {\n    for (var _len2 = arguments.length, args = new Array(_len2 > 1 ? _len2 - 1 : 0), _key2 = 1; _key2 < _len2; _key2++) {\n      args[_key2 - 1] = arguments[_key2];\n    }\n    return new Func(...args);\n  };\n}\nconst arrayForEach = unapply(Array.prototype.forEach);\nconst arrayLastIndexOf = unapply(Array.prototype.lastIndexOf);\nconst arrayPop = unapply(Array.prototype.pop);\nconst arrayPush = unapply(Array.prototype.push);\nconst arraySplice = unapply(Array.prototype.splice);\nconst arrayIsArray = Array.isArray;\nconst stringToLowerCase = unapply(String.prototype.toLowerCase);\nconst stringToString = unapply(String.prototype.toString);\nconst stringMatch = unapply(String.prototype.match);\nconst stringReplace = unapply(String.prototype.replace);\nconst stringIndexOf = unapply(String.prototype.indexOf);\nconst stringTrim = unapply(String.prototype.trim);\nconst numberToString = unapply(Number.prototype.toString);\nconst booleanToString = unapply(Boolean.prototype.toString);\nconst bigintToString = typeof BigInt === 'undefined' ? null : unapply(BigInt.prototype.toString);\nconst symbolToString = typeof Symbol === 'undefined' ? null : unapply(Symbol.prototype.toString);\nconst objectHasOwnProperty = unapply(Object.prototype.hasOwnProperty);\nconst objectToString = unapply(Object.prototype.toString);\nconst regExpTest = unapply(RegExp.prototype.test);\nconst typeErrorCreate = unconstruct(TypeError);\n/**\n * Creates a new function that calls the given function with a specified thisArg and arguments.\n *\n * @param func - The function to be wrapped and called.\n * @returns A new function that calls the given function with a specified thisArg and arguments.\n */\nfunction unapply(func) {\n  return function (thisArg) {\n    if (thisArg instanceof RegExp) {\n      thisArg.lastIndex = 0;\n    }\n    for (var _len3 = arguments.length, args = new Array(_len3 > 1 ? _len3 - 1 : 0), _key3 = 1; _key3 < _len3; _key3++) {\n      args[_key3 - 1] = arguments[_key3];\n    }\n    return apply(func, thisArg, args);\n  };\n}\n/**\n * Creates a new function that constructs an instance of the given constructor function with the provided arguments.\n *\n * @param func - The constructor function to be wrapped and called.\n * @returns A new function that constructs an instance of the given constructor function with the provided arguments.\n */\nfunction unconstruct(Func) {\n  return function () {\n    for (var _len4 = arguments.length, args = new Array(_len4), _key4 = 0; _key4 < _len4; _key4++) {\n      args[_key4] = arguments[_key4];\n    }\n    return construct(Func, args);\n  };\n}\n/**\n * Add properties to a lookup table\n *\n * @param set - The set to which elements will be added.\n * @param array - The array containing elements to be added to the set.\n * @param transformCaseFunc - An optional function to transform the case of each element before adding to the set.\n * @returns The modified set with added elements.\n */\nfunction addToSet(set, array) {\n  let transformCaseFunc = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : stringToLowerCase;\n  if (setPrototypeOf) {\n    // Make 'in' and truthy checks like Boolean(set.constructor)\n    // independent of any properties defined on Object.prototype.\n    // Prevent prototype setters from intercepting set as a this value.\n    setPrototypeOf(set, null);\n  }\n  if (!arrayIsArray(array)) {\n    return set;\n  }\n  let l = array.length;\n  while (l--) {\n    let element = array[l];\n    if (typeof element === 'string') {\n      const lcElement = transformCaseFunc(element);\n      if (lcElement !== element) {\n        // Config presets (e.g. tags.js, attrs.js) are immutable.\n        if (!isFrozen(array)) {\n          array[l] = lcElement;\n        }\n        element = lcElement;\n      }\n    }\n    set[element] = true;\n  }\n  return set;\n}\n/**\n * Clean up an array to harden against CSPP\n *\n * @param array - The array to be cleaned.\n * @returns The cleaned version of the array\n */\nfunction cleanArray(array) {\n  for (let index = 0; index < array.length; index++) {\n    const isPropertyExist = objectHasOwnProperty(array, index);\n    if (!isPropertyExist) {\n      array[index] = null;\n    }\n  }\n  return array;\n}\n/**\n * Shallow clone an object\n *\n * @param object - The object to be cloned.\n * @returns A new object that copies the original.\n */\nfunction clone(object) {\n  const newObject = create(null);\n  for (const _ref2 of entries(object)) {\n    var _ref3 = _slicedToArray(_ref2, 2);\n    const property = _ref3[0];\n    const value = _ref3[1];\n    const isPropertyExist = objectHasOwnProperty(object, property);\n    if (isPropertyExist) {\n      if (arrayIsArray(value)) {\n        newObject[property] = cleanArray(value);\n      } else if (value && typeof value === 'object' && value.constructor === Object) {\n        newObject[property] = clone(value);\n      } else {\n        newObject[property] = value;\n      }\n    }\n  }\n  return newObject;\n}\n/**\n * Convert non-node values into strings without depending on direct property access.\n *\n * @param value - The value to stringify.\n * @returns A string representation of the provided value.\n */\nfunction stringifyValue(value) {\n  switch (typeof value) {\n    case 'string':\n      {\n        return value;\n      }\n    case 'number':\n      {\n        return numberToString(value);\n      }\n    case 'boolean':\n      {\n        return booleanToString(value);\n      }\n    case 'bigint':\n      {\n        return bigintToString ? bigintToString(value) : '0';\n      }\n    case 'symbol':\n      {\n        return symbolToString ? symbolToString(value) : 'Symbol()';\n      }\n    case 'undefined':\n      {\n        return objectToString(value);\n      }\n    case 'function':\n    case 'object':\n      {\n        if (value === null) {\n          return objectToString(value);\n        }\n        const valueAsRecord = value;\n        const valueToString = lookupGetter(valueAsRecord, 'toString');\n        if (typeof valueToString === 'function') {\n          const stringified = valueToString(valueAsRecord);\n          return typeof stringified === 'string' ? stringified : objectToString(stringified);\n        }\n        return objectToString(value);\n      }\n    default:\n      {\n        return objectToString(value);\n      }\n  }\n}\n/**\n * This method automatically checks if the prop is function or getter and behaves accordingly.\n *\n * @param object - The object to look up the getter function in its prototype chain.\n * @param prop - The property name for which to find the getter function.\n * @returns The getter function found in the prototype chain or a fallback function.\n */\nfunction lookupGetter(object, prop) {\n  while (object !== null) {\n    const desc = getOwnPropertyDescriptor(object, prop);\n    if (desc) {\n      if (desc.get) {\n        return unapply(desc.get);\n      }\n      if (typeof desc.value === 'function') {\n        return unapply(desc.value);\n      }\n    }\n    object = getPrototypeOf(object);\n  }\n  function fallbackValue() {\n    return null;\n  }\n  return fallbackValue;\n}\nfunction isRegex(value) {\n  try {\n    regExpTest(value, '');\n    return true;\n  } catch (_unused) {\n    return false;\n  }\n}\n\nconst html$1 = freeze(['a', 'abbr', 'acronym', 'address', 'area', 'article', 'aside', 'audio', 'b', 'bdi', 'bdo', 'big', 'blink', 'blockquote', 'body', 'br', 'button', 'canvas', 'caption', 'center', 'cite', 'code', 'col', 'colgroup', 'content', 'data', 'datalist', 'dd', 'decorator', 'del', 'details', 'dfn', 'dialog', 'dir', 'div', 'dl', 'dt', 'element', 'em', 'fieldset', 'figcaption', 'figure', 'font', 'footer', 'form', 'h1', 'h2', 'h3', 'h4', 'h5', 'h6', 'head', 'header', 'hgroup', 'hr', 'html', 'i', 'img', 'input', 'ins', 'kbd', 'label', 'legend', 'li', 'main', 'map', 'mark', 'marquee', 'menu', 'menuitem', 'meter', 'nav', 'nobr', 'ol', 'optgroup', 'option', 'output', 'p', 'picture', 'pre', 'progress', 'q', 'rp', 'rt', 'ruby', 's', 'samp', 'search', 'section', 'select', 'shadow', 'slot', 'small', 'source', 'spacer', 'span', 'strike', 'strong', 'style', 'sub', 'summary', 'sup', 'table', 'tbody', 'td', 'template', 'textarea', 'tfoot', 'th', 'thead', 'time', 'tr', 'track', 'tt', 'u', 'ul', 'var', 'video', 'wbr']);\nconst svg$1 = freeze(['svg', 'a', 'altglyph', 'altglyphdef', 'altglyphitem', 'animatecolor', 'animatemotion', 'animatetransform', 'circle', 'clippath', 'defs', 'desc', 'ellipse', 'enterkeyhint', 'exportparts', 'filter', 'font', 'g', 'glyph', 'glyphref', 'hkern', 'image', 'inputmode', 'line', 'lineargradient', 'marker', 'mask', 'metadata', 'mpath', 'part', 'path', 'pattern', 'polygon', 'polyline', 'radialgradient', 'rect', 'stop', 'style', 'switch', 'symbol', 'text', 'textpath', 'title', 'tref', 'tspan', 'view', 'vkern']);\nconst svgFilters = freeze(['feBlend', 'feColorMatrix', 'feComponentTransfer', 'feComposite', 'feConvolveMatrix', 'feDiffuseLighting', 'feDisplacementMap', 'feDistantLight', 'feDropShadow', 'feFlood', 'feFuncA', 'feFuncB', 'feFuncG', 'feFuncR', 'feGaussianBlur', 'feImage', 'feMerge', 'feMergeNode', 'feMorphology', 'feOffset', 'fePointLight', 'feSpecularLighting', 'feSpotLight', 'feTile', 'feTurbulence']);\n// List of SVG elements that are disallowed by default.\n// We still need to know them so that we can do namespace\n// checks properly in case one wants to add them to\n// allow-list.\nconst svgDisallowed = freeze(['animate', 'color-profile', 'cursor', 'discard', 'font-face', 'font-face-format', 'font-face-name', 'font-face-src', 'font-face-uri', 'foreignobject', 'hatch', 'hatchpath', 'mesh', 'meshgradient', 'meshpatch', 'meshrow', 'missing-glyph', 'script', 'set', 'solidcolor', 'unknown', 'use']);\nconst mathMl$1 = freeze(['math', 'menclose', 'merror', 'mfenced', 'mfrac', 'mglyph', 'mi', 'mlabeledtr', 'mmultiscripts', 'mn', 'mo', 'mover', 'mpadded', 'mphantom', 'mroot', 'mrow', 'ms', 'mspace', 'msqrt', 'mstyle', 'msub', 'msup', 'msubsup', 'mtable', 'mtd', 'mtext', 'mtr', 'munder', 'munderover', 'mprescripts']);\n// Similarly to SVG, we want to know all MathML elements,\n// even those that we disallow by default.\nconst mathMlDisallowed = freeze(['maction', 'maligngroup', 'malignmark', 'mlongdiv', 'mscarries', 'mscarry', 'msgroup', 'mstack', 'msline', 'msrow', 'semantics', 'annotation', 'annotation-xml', 'mprescripts', 'none']);\nconst text = freeze(['#text']);\n\nconst html = freeze(['accept', 'action', 'align', 'alt', 'autocapitalize', 'autocomplete', 'autopictureinpicture', 'autoplay', 'background', 'bgcolor', 'border', 'capture', 'cellpadding', 'cellspacing', 'checked', 'cite', 'class', 'clear', 'color', 'cols', 'colspan', 'command', 'commandfor', 'controls', 'controlslist', 'coords', 'crossorigin', 'datetime', 'decoding', 'default', 'dir', 'disabled', 'disablepictureinpicture', 'disableremoteplayback', 'download', 'draggable', 'enctype', 'enterkeyhint', 'exportparts', 'face', 'for', 'headers', 'height', 'hidden', 'high', 'href', 'hreflang', 'id', 'inert', 'inputmode', 'integrity', 'ismap', 'kind', 'label', 'lang', 'list', 'loading', 'loop', 'low', 'max', 'maxlength', 'media', 'method', 'min', 'minlength', 'multiple', 'muted', 'name', 'nonce', 'noshade', 'novalidate', 'nowrap', 'open', 'optimum', 'part', 'pattern', 'placeholder', 'playsinline', 'popover', 'popovertarget', 'popovertargetaction', 'poster', 'preload', 'pubdate', 'radiogroup', 'readonly', 'rel', 'required', 'rev', 'reversed', 'role', 'rows', 'rowspan', 'spellcheck', 'scope', 'selected', 'shape', 'size', 'sizes', 'slot', 'span', 'srclang', 'start', 'src', 'srcset', 'step', 'style', 'summary', 'tabindex', 'title', 'translate', 'type', 'usemap', 'valign', 'value', 'width', 'wrap', 'xmlns']);\nconst svg = freeze(['accent-height', 'accumulate', 'additive', 'alignment-baseline', 'amplitude', 'ascent', 'attributename', 'attributetype', 'azimuth', 'basefrequency', 'baseline-shift', 'begin', 'bias', 'by', 'class', 'clip', 'clippathunits', 'clip-path', 'clip-rule', 'color', 'color-interpolation', 'color-interpolation-filters', 'color-profile', 'color-rendering', 'cx', 'cy', 'd', 'dx', 'dy', 'diffuseconstant', 'direction', 'display', 'divisor', 'dominant-baseline', 'dur', 'edgemode', 'elevation', 'end', 'exponent', 'fill', 'fill-opacity', 'fill-rule', 'filter', 'filterunits', 'flood-color', 'flood-opacity', 'font-family', 'font-size', 'font-size-adjust', 'font-stretch', 'font-style', 'font-variant', 'font-weight', 'fx', 'fy', 'g1', 'g2', 'glyph-name', 'glyphref', 'gradientunits', 'gradienttransform', 'height', 'href', 'id', 'image-rendering', 'in', 'in2', 'intercept', 'k', 'k1', 'k2', 'k3', 'k4', 'kerning', 'keypoints', 'keysplines', 'keytimes', 'lang', 'lengthadjust', 'letter-spacing', 'kernelmatrix', 'kernelunitlength', 'lighting-color', 'local', 'marker-end', 'marker-mid', 'marker-start', 'markerheight', 'markerunits', 'markerwidth', 'maskcontentunits', 'maskunits', 'max', 'mask', 'mask-type', 'media', 'method', 'mode', 'min', 'name', 'numoctaves', 'offset', 'operator', 'opacity', 'order', 'orient', 'orientation', 'origin', 'overflow', 'paint-order', 'path', 'pathlength', 'patterncontentunits', 'patterntransform', 'patternunits', 'pointer-events', 'points', 'preservealpha', 'preserveaspectratio', 'primitiveunits', 'r', 'rx', 'ry', 'radius', 'refx', 'refy', 'repeatcount', 'repeatdur', 'restart', 'result', 'rotate', 'scale', 'seed', 'shape-rendering', 'slope', 'specularconstant', 'specularexponent', 'spreadmethod', 'startoffset', 'stddeviation', 'stitchtiles', 'stop-color', 'stop-opacity', 'stroke-dasharray', 'stroke-dashoffset', 'stroke-linecap', 'stroke-linejoin', 'stroke-miterlimit', 'stroke-opacity', 'stroke', 'stroke-width', 'style', 'surfacescale', 'systemlanguage', 'tabindex', 'tablevalues', 'targetx', 'targety', 'transform', 'transform-origin', 'text-anchor', 'text-decoration', 'text-orientation', 'text-rendering', 'textlength', 'type', 'u1', 'u2', 'unicode', 'values', 'vector-effect', 'viewbox', 'visibility', 'version', 'vert-adv-y', 'vert-origin-x', 'vert-origin-y', 'width', 'word-spacing', 'wrap', 'writing-mode', 'xchannelselector', 'ychannelselector', 'x', 'x1', 'x2', 'xmlns', 'y', 'y1', 'y2', 'z', 'zoomandpan']);\nconst mathMl = freeze(['accent', 'accentunder', 'align', 'bevelled', 'close', 'columnalign', 'columnlines', 'columnspacing', 'columnspan', 'denomalign', 'depth', 'dir', 'display', 'displaystyle', 'encoding', 'fence', 'frame', 'height', 'href', 'id', 'largeop', 'length', 'linethickness', 'lquote', 'lspace', 'mathbackground', 'mathcolor', 'mathsize', 'mathvariant', 'maxsize', 'minsize', 'movablelimits', 'notation', 'numalign', 'open', 'rowalign', 'rowlines', 'rowspacing', 'rowspan', 'rspace', 'rquote', 'scriptlevel', 'scriptminsize', 'scriptsizemultiplier', 'selection', 'separator', 'separators', 'stretchy', 'subscriptshift', 'supscriptshift', 'symmetric', 'voffset', 'width', 'xmlns']);\nconst xml = freeze(['xlink:href', 'xml:id', 'xlink:title', 'xml:space', 'xmlns:xlink']);\n\nconst MUSTACHE_EXPR = seal(/{{[\\w\\W]*|^[\\w\\W]*}}/g);\nconst ERB_EXPR = seal(/<%[\\w\\W]*|^[\\w\\W]*%>/g);\nconst TMPLIT_EXPR = seal(/\\${[\\w\\W]*/g);\nconst DATA_ATTR = seal(/^data-[\\-\\w.\\u00B7-\\uFFFF]+$/); // eslint-disable-line no-useless-escape\nconst ARIA_ATTR = seal(/^aria-[\\-\\w]+$/); // eslint-disable-line no-useless-escape\nconst IS_ALLOWED_URI = seal(/^(?:(?:(?:f|ht)tps?|mailto|tel|callto|sms|cid|xmpp|matrix):|[^a-z]|[a-z+.\\-]+(?:[^a-z+.\\-:]|$))/i // eslint-disable-line no-useless-escape\n);\nconst IS_SCRIPT_OR_DATA = seal(/^(?:\\w+script|data):/i);\nconst ATTR_WHITESPACE = seal(/[\\u0000-\\u0020\\u00A0\\u1680\\u180E\\u2000-\\u2029\\u205F\\u3000]/g // eslint-disable-line no-control-regex\n);\nconst DOCTYPE_NAME = seal(/^html$/i);\nconst CUSTOM_ELEMENT = seal(/^[a-z][.\\w]*(-[.\\w]+)+$/i);\n// Markup-significant character probes used by _sanitizeElements.\n// Shared module-level instances are safe despite the sticky /g flags:\n// unapply() resets lastIndex for RegExp receivers before every call.\nconst ELEMENT_MARKUP_PROBE = seal(/<[/\\w!]/g);\nconst COMMENT_MARKUP_PROBE = seal(/<[/\\w]/g);\nconst FALLBACK_TAG_CLOSE = seal(/<\\/no(script|embed|frames)/i);\nconst SELF_CLOSING_TAG = seal(/\\/>/i);\n\n// https://developer.mozilla.org/en-US/docs/Web/API/Node/nodeType\nconst NODE_TYPE = {\n  element: 1,\n  attribute: 2,\n  text: 3,\n  cdataSection: 4,\n  entityReference: 5,\n  // Deprecated\n  entityNode: 6,\n  // Deprecated\n  processingInstruction: 7,\n  comment: 8,\n  document: 9,\n  documentType: 10,\n  documentFragment: 11,\n  notation: 12 // Deprecated\n};\n/* HTML-namespace elements whose child text nodes are serialized *literally*\n   (unescaped) by the HTML fragment-serialization algorithm. Two reparse-mXSS\n   shapes ride on that literal serialization:\n     (a) an element child - a tree the HTML parser can never build, but the DOM\n         API and an XML/XHTML parse can - after which a `</tag>`-bearing text\n         sibling breaks the element open on reparse; and\n     (b) text-only content that already carries the element's OWN end tag, e.g.\n         `<style>...</style><img onerror=x>` built as a node, which the literal\n         serializer emits verbatim for the HTML parser to re-open.\n   Shape (a) is handled by the firstElementChild branch in _isUnsafeNode; shape\n   (b) by the LITERAL_TEXT_CLOSE probe. Both read textContent (the raw-serialized\n   form for these elements) rather than innerHTML, because an XML/XHTML working\n   document serializes innerHTML with `<` escaped, which silently blinds the\n   innerHTML-based probes (rule 1's second probe and FALLBACK_TAG_CLOSE) there.\n   `script` is never allow-listed, but is kept here so the guard matches the\n   serializer's own literal-text list exactly. */\nconst LITERAL_TEXT_ELEMENT_NAMES = ['style', 'script', 'xmp', 'iframe', 'noembed', 'noframes', 'plaintext', 'noscript'];\nconst LITERAL_TEXT_ELEMENTS = freeze(addToSet({}, LITERAL_TEXT_ELEMENT_NAMES));\n/* Per-element end-tag matcher. On an HTML reparse the ONLY token that\n   terminates a literal-text element's raw content is its own end tag; a foreign\n   literal-text close (e.g. `</xmp>` sitting inside `<style>`) does not break\n   out, so matching is per-element, not a shared alternation. The lookahead\n   requires an HTML tag-name terminator (whitespace, `/` or `>`) so a longer\n   name such as `</styles` is not mistaken for `</style`. */\nconst LITERAL_TEXT_CLOSE = function () {\n  const map = {};\n  arrayForEach(LITERAL_TEXT_ELEMENT_NAMES, name => {\n    map[name] = seal(new RegExp('</' + name + '(?=[\\\\t\\\\n\\\\f\\\\r />])', 'i'));\n  });\n  return freeze(map);\n}();\nconst getGlobal = function getGlobal() {\n  return typeof window === 'undefined' ? null : window;\n};\n/**\n * Creates a no-op policy for internal use only.\n * Don't export this function outside this module!\n * @param trustedTypes The policy factory.\n * @param purifyHostElement The Script element used to load DOMPurify (to determine policy name suffix).\n * @return The policy created (or null, if Trusted Types\n * are not supported or creating the policy failed).\n */\nconst _createTrustedTypesPolicy = function _createTrustedTypesPolicy(trustedTypes, purifyHostElement) {\n  if (typeof trustedTypes !== 'object' || typeof trustedTypes.createPolicy !== 'function') {\n    return null;\n  }\n  // Allow the callers to control the unique policy name\n  // by adding a data-tt-policy-suffix to the script element with the DOMPurify.\n  // Policy creation with duplicate names throws in Trusted Types.\n  let suffix = null;\n  const ATTR_NAME = 'data-tt-policy-suffix';\n  if (purifyHostElement && purifyHostElement.hasAttribute(ATTR_NAME)) {\n    suffix = purifyHostElement.getAttribute(ATTR_NAME);\n  }\n  const policyName = 'dompurify' + (suffix ? '#' + suffix : '');\n  try {\n    return trustedTypes.createPolicy(policyName, {\n      createHTML(html) {\n        return html;\n      },\n      createScriptURL(scriptUrl) {\n        return scriptUrl;\n      }\n    });\n  } catch (_) {\n    // Policy creation failed (most likely another DOMPurify script has\n    // already run). Skip creating the policy, as this will only cause errors\n    // if TT are enforced.\n    console.warn('TrustedTypes policy ' + policyName + ' could not be created.');\n    return null;\n  }\n};\nconst _createHooksMap = function _createHooksMap() {\n  return {\n    afterSanitizeAttributes: [],\n    afterSanitizeElements: [],\n    afterSanitizeShadowDOM: [],\n    beforeSanitizeAttributes: [],\n    beforeSanitizeElements: [],\n    beforeSanitizeShadowDOM: [],\n    uponSanitizeAttribute: [],\n    uponSanitizeElement: [],\n    uponSanitizeShadowNode: []\n  };\n};\n/**\n * Resolve a set-valued configuration option: a fresh set built from\n * cfg[key] when it is an own array property (seeded with a clone of\n * options.base when given, case-normalized via options.transform),\n * the fallback set otherwise.\n *\n * @param cfg the cloned, prototype-free configuration object\n * @param key the configuration property to read\n * @param fallback the set to use when the option is absent or not an array\n * @param options transform and optional base set to merge into\n * @returns the resolved set\n */\nconst _resolveSetOption = function _resolveSetOption(cfg, key, fallback, options) {\n  return objectHasOwnProperty(cfg, key) && arrayIsArray(cfg[key]) ? addToSet(options.base ? clone(options.base) : {}, cfg[key], options.transform) : fallback;\n};\n/**\n * Resolve an object-valued configuration option: a prototype-free clone\n * of cfg[key] when it is an own, truthy object property, else a fresh\n * fallback built by makeFallback (fresh on every parse, so a previous\n * parse can never leak state into the next one).\n *\n * @param cfg the cloned, prototype-free configuration object\n * @param key the configuration property to read\n * @param makeFallback builds the fallback value when the option is absent\n * @returns the resolved object\n */\nconst _resolveObjectOption = function _resolveObjectOption(cfg, key, makeFallback) {\n  const value = objectHasOwnProperty(cfg, key) ? cfg[key] : undefined;\n  return value && typeof value === 'object' ? clone(value) : makeFallback();\n};\nfunction createDOMPurify() {\n  let window = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : getGlobal();\n  const DOMPurify = root => createDOMPurify(root);\n  DOMPurify.version = '3.4.15';\n  DOMPurify.removed = [];\n  if (!window || !window.document || window.document.nodeType !== NODE_TYPE.document || !window.Element) {\n    // Not running in a browser, provide a factory function\n    // so that you can pass your own Window\n    DOMPurify.isSupported = false;\n    return DOMPurify;\n  }\n  let document = window.document;\n  const originalDocument = document;\n  const currentScript = originalDocument.currentScript;\n  window.DocumentFragment;\n    const HTMLTemplateElement = window.HTMLTemplateElement,\n    Node = window.Node,\n    Element = window.Element,\n    NodeFilter = window.NodeFilter,\n    _window$NamedNodeMap = window.NamedNodeMap;\n    _window$NamedNodeMap === void 0 ? window.NamedNodeMap || window.MozNamedAttrMap : _window$NamedNodeMap;\n    window.HTMLFormElement;\n    const DOMParser = window.DOMParser,\n    trustedTypes = window.trustedTypes;\n  const ElementPrototype = Element.prototype;\n  const cloneNode = lookupGetter(ElementPrototype, 'cloneNode');\n  const remove = lookupGetter(ElementPrototype, 'remove');\n  // Clobber-safe Attr-node removal. On an HTMLFormElement a descendant named\n  // \"removeAttributeNode\" shadows the prototype method via\n  // [LegacyOverrideBuiltIns], so element.removeAttributeNode(attr) throws.\n  // Calling the cached Element.prototype method with the element as the\n  // receiver removes the exact live Attr node regardless of the shadowing.\n  const removeAttributeNode = lookupGetter(ElementPrototype, 'removeAttributeNode');\n  const getNextSibling = lookupGetter(ElementPrototype, 'nextSibling');\n  const getChildNodes = lookupGetter(ElementPrototype, 'childNodes');\n  const getParentNode = lookupGetter(ElementPrototype, 'parentNode');\n  const getShadowRoot = lookupGetter(ElementPrototype, 'shadowRoot');\n  const getAttributes = lookupGetter(ElementPrototype, 'attributes');\n  const getNodeType = Node && Node.prototype ? lookupGetter(Node.prototype, 'nodeType') : null;\n  const getNodeName = Node && Node.prototype ? lookupGetter(Node.prototype, 'nodeName') : null;\n  const getOwnerDocument = Node && Node.prototype ? lookupGetter(Node.prototype, 'ownerDocument') : null;\n  /* Clobber-safe nodeType / nodeName reads through the cached Node.prototype\n     getters, with a direct-property fallback for environments that lack\n     Node.prototype. Sites that need a different fallback (e.g. _isClobbered\n     returns early on a null name) intentionally keep their own reads. */\n  const _readNodeType = function _readNodeType(node) {\n    return getNodeType ? getNodeType(node) : node.nodeType;\n  };\n  const _readNodeName = function _readNodeName(node) {\n    return getNodeName ? getNodeName(node) : node.nodeName;\n  };\n  // As per issue #47, the web-components registry is inherited by a\n  // new document created via createHTMLDocument. As per the spec\n  // (http://w3c.github.io/webcomponents/spec/custom/#creating-and-passing-registries)\n  // a new empty registry is used when creating a template contents owner\n  // document, so we use that as our parent document to ensure nothing\n  // is inherited.\n  if (typeof HTMLTemplateElement === 'function') {\n    const template = document.createElement('template');\n    if (template.content && template.content.ownerDocument) {\n      document = template.content.ownerDocument;\n    }\n  }\n  let trustedTypesPolicy;\n  let emptyHTML = '';\n  // The instance's own internal Trusted Types policy. Unlike a caller-supplied\n  // `TRUSTED_TYPES_POLICY`, this is created at most once — Trusted Types throws\n  // on duplicate policy names — and is the only policy allowed to persist\n  // across configurations and survive `clearConfig()`.\n  let defaultTrustedTypesPolicy;\n  let defaultTrustedTypesPolicyResolved = false;\n  // Tracks whether we are already inside a call to the configured Trusted Types\n  // policy (`createHTML` or `createScriptURL`). If a supplied policy callback\n  // itself calls `DOMPurify.sanitize` (the cause of #1422), `sanitize` would\n  // re-enter the policy and recurse until the stack overflows. We detect that\n  // re-entry and throw a clear, actionable error instead. The guard is shared\n  // across both callbacks, because either one re-entering `sanitize` triggers\n  // the same unbounded recursion.\n  let IN_TRUSTED_TYPES_POLICY = 0;\n  const _assertNotInTrustedTypesPolicy = function _assertNotInTrustedTypesPolicy() {\n    if (IN_TRUSTED_TYPES_POLICY > 0) {\n      throw typeErrorCreate('A configured TRUSTED_TYPES_POLICY callback (createHTML or ' + 'createScriptURL) must not call DOMPurify.sanitize, as that causes ' + 'infinite recursion. Do not pass a policy whose callbacks wrap ' + 'DOMPurify as TRUSTED_TYPES_POLICY; see the \"DOMPurify and Trusted ' + 'Types\" section of the README.');\n    }\n  };\n  const _createTrustedHTML = function _createTrustedHTML(html) {\n    _assertNotInTrustedTypesPolicy();\n    IN_TRUSTED_TYPES_POLICY++;\n    try {\n      return trustedTypesPolicy.createHTML(html);\n    } finally {\n      IN_TRUSTED_TYPES_POLICY--;\n    }\n  };\n  const _createTrustedScriptURL = function _createTrustedScriptURL(scriptUrl) {\n    _assertNotInTrustedTypesPolicy();\n    IN_TRUSTED_TYPES_POLICY++;\n    try {\n      return trustedTypesPolicy.createScriptURL(scriptUrl);\n    } finally {\n      IN_TRUSTED_TYPES_POLICY--;\n    }\n  };\n  // Lazily resolve (and cache) the instance's internal default policy.\n  // Resolution is attempted at most once: a successful `createPolicy` cannot be\n  // repeated (Trusted Types throws on duplicate names), and a failed or\n  // unsupported attempt must not be retried on every parse.\n  const _getDefaultTrustedTypesPolicy = function _getDefaultTrustedTypesPolicy() {\n    if (!defaultTrustedTypesPolicyResolved) {\n      defaultTrustedTypesPolicy = _createTrustedTypesPolicy(trustedTypes, currentScript);\n      defaultTrustedTypesPolicyResolved = true;\n    }\n    return defaultTrustedTypesPolicy;\n  };\n  const _document = document,\n    implementation = _document.implementation,\n    createNodeIterator = _document.createNodeIterator,\n    createDocumentFragment = _document.createDocumentFragment,\n    getElementsByTagName = _document.getElementsByTagName;\n  const importNode = originalDocument.importNode;\n  let hooks = _createHooksMap();\n  /**\n   * Expose whether this browser supports running the full DOMPurify.\n   */\n  DOMPurify.isSupported = typeof entries === 'function' && typeof getParentNode === 'function' && implementation && implementation.createHTMLDocument !== undefined;\n  const MUSTACHE_EXPR$1 = MUSTACHE_EXPR,\n    ERB_EXPR$1 = ERB_EXPR,\n    TMPLIT_EXPR$1 = TMPLIT_EXPR,\n    DATA_ATTR$1 = DATA_ATTR,\n    ARIA_ATTR$1 = ARIA_ATTR,\n    IS_SCRIPT_OR_DATA$1 = IS_SCRIPT_OR_DATA,\n    ATTR_WHITESPACE$1 = ATTR_WHITESPACE,\n    CUSTOM_ELEMENT$1 = CUSTOM_ELEMENT;\n  let IS_ALLOWED_URI$1 = IS_ALLOWED_URI;\n  /**\n   * We consider the elements and attributes below to be safe. Ideally\n   * don't add any new ones but feel free to remove unwanted ones.\n   */\n  /* allowed element names */\n  let ALLOWED_TAGS = null;\n  const DEFAULT_ALLOWED_TAGS = addToSet({}, [...html$1, ...svg$1, ...svgFilters, ...mathMl$1, ...text]);\n  /* Allowed attribute names */\n  let ALLOWED_ATTR = null;\n  const DEFAULT_ALLOWED_ATTR = addToSet({}, [...html, ...svg, ...mathMl, ...xml]);\n  /*\n   * Configure how DOMPurify should handle custom elements and their attributes as well as customized built-in elements.\n   * @property {RegExp|Function|null} tagNameCheck one of [null, regexPattern, predicate]. Default: `null` (disallow any custom elements)\n   * @property {RegExp|Function|null} attributeNameCheck one of [null, regexPattern, predicate]. Default: `null` (disallow any attributes not on the allow list)\n   * @property {boolean} allowCustomizedBuiltInElements allow custom elements derived from built-ins if they pass CUSTOM_ELEMENT_HANDLING.tagNameCheck. Default: `false`.\n   */\n  let CUSTOM_ELEMENT_HANDLING = Object.seal(create(null, {\n    tagNameCheck: {\n      writable: true,\n      configurable: false,\n      enumerable: true,\n      value: null\n    },\n    attributeNameCheck: {\n      writable: true,\n      configurable: false,\n      enumerable: true,\n      value: null\n    },\n    allowCustomizedBuiltInElements: {\n      writable: true,\n      configurable: false,\n      enumerable: true,\n      value: false\n    }\n  }));\n  /* Explicitly forbidden tags (overrides ALLOWED_TAGS/ADD_TAGS) */\n  let FORBID_TAGS = null;\n  /* Explicitly forbidden attributes (overrides ALLOWED_ATTR/ADD_ATTR) */\n  let FORBID_ATTR = null;\n  /* Config object to store ADD_TAGS/ADD_ATTR functions (when used as functions) */\n  const EXTRA_ELEMENT_HANDLING = Object.seal(create(null, {\n    tagCheck: {\n      writable: true,\n      configurable: false,\n      enumerable: true,\n      value: null\n    },\n    attributeCheck: {\n      writable: true,\n      configurable: false,\n      enumerable: true,\n      value: null\n    }\n  }));\n  /* Decide if ARIA attributes are okay */\n  let ALLOW_ARIA_ATTR = true;\n  /* Decide if custom data attributes are okay */\n  let ALLOW_DATA_ATTR = true;\n  /* Decide if unknown protocols are okay */\n  let ALLOW_UNKNOWN_PROTOCOLS = false;\n  /* Decide if self-closing tags in attributes are allowed.\n   * Usually removed due to a mXSS issue in jQuery 3.0 */\n  let ALLOW_SELF_CLOSE_IN_ATTR = true;\n  /* Output should be safe for common template engines.\n   * This means, DOMPurify removes data attributes, mustaches and ERB\n   */\n  let SAFE_FOR_TEMPLATES = false;\n  /* Output should be safe even for XML used within HTML and alike.\n   * This means, DOMPurify removes comments when containing risky content.\n   */\n  let SAFE_FOR_XML = true;\n  /* Decide if document with <html>... should be returned */\n  let WHOLE_DOCUMENT = false;\n  /* Track whether config is already set on this instance of DOMPurify. */\n  let SET_CONFIG = false;\n  /* Pristine allowlist bindings captured at setConfig() time. On the\n   * persistent-config path sanitize() restores the sets from these before\n   * the per-walk hook clone-guard, so a hook's in-call widening cannot\n   * carry across calls. Null until setConfig() is called; reset by\n   * clearConfig(). */\n  let SET_CONFIG_ALLOWED_TAGS = null;\n  let SET_CONFIG_ALLOWED_ATTR = null;\n  /* Decide if all elements (e.g. style, script) must be children of\n   * document.body. By default, browsers might move them to document.head */\n  let FORCE_BODY = false;\n  /* Decide if a DOM `HTMLBodyElement` should be returned, instead of a html\n   * string (or a TrustedHTML object if Trusted Types are supported).\n   * If `WHOLE_DOCUMENT` is enabled a `HTMLHtmlElement` will be returned instead\n   */\n  let RETURN_DOM = false;\n  /* Decide if a DOM `DocumentFragment` should be returned, instead of a html\n   * string  (or a TrustedHTML object if Trusted Types are supported) */\n  let RETURN_DOM_FRAGMENT = false;\n  /* Try to return a Trusted Type object instead of a string, return a string in\n   * case Trusted Types are not supported  */\n  let RETURN_TRUSTED_TYPE = false;\n  /* Output should be free from DOM clobbering attacks?\n   * This sanitizes markups named with colliding, clobberable built-in DOM APIs.\n   */\n  let SANITIZE_DOM = true;\n  /* Achieve full DOM Clobbering protection by isolating the namespace of named\n   * properties and JS variables, mitigating attacks that abuse the HTML/DOM spec rules.\n   *\n   * HTML/DOM spec rules that enable DOM Clobbering:\n   *   - Named Access on Window (§7.3.3)\n   *   - DOM Tree Accessors (§3.1.5)\n   *   - Form Element Parent-Child Relations (§4.10.3)\n   *   - Iframe srcdoc / Nested WindowProxies (§4.8.5)\n   *   - HTMLCollection (§4.2.10.2)\n   *\n   * Namespace isolation is implemented by prefixing `id` and `name` attributes\n   * with a constant string, i.e., `user-content-`\n   */\n  let SANITIZE_NAMED_PROPS = false;\n  const SANITIZE_NAMED_PROPS_PREFIX = 'user-content-';\n  /* Keep element content when removing element? */\n  let KEEP_CONTENT = true;\n  /* If a `Node` is passed to sanitize(), then performs sanitization in-place instead\n   * of importing it into a new Document and returning a sanitized copy */\n  let IN_PLACE = false;\n  /* Allow usage of profiles like html, svg and mathMl */\n  let USE_PROFILES = {};\n  /* Tags to ignore content of when KEEP_CONTENT is true */\n  let FORBID_CONTENTS = null;\n  const DEFAULT_FORBID_CONTENTS = addToSet({}, ['annotation-xml', 'audio', 'colgroup', 'desc', 'foreignobject', 'head', 'iframe', 'math', 'mi', 'mn', 'mo', 'ms', 'mtext', 'noembed', 'noframes', 'noscript', 'plaintext', 'script',\n  // <selectedcontent> mirrors the selected <option>'s subtree, cloned by\n  // the UA (customizable <select>) — including any on* handlers — and the\n  // engine re-mirrors synchronously whenever a removal changes which\n  // option/selectedcontent is current, even inside DOMPurify's inert\n  // DOMParser document. Hoisting its children on removal re-inserts a fresh\n  // mirror target ahead of the walk, which the engine refills, looping\n  // forever (DoS) and amplifying output. Dropping its content on removal\n  // (rather than hoisting) breaks that cascade; the content is a duplicate\n  // of the option, which is sanitized on its own. See campaign-3 F1/F6.\n  'selectedcontent', 'style', 'svg', 'template', 'thead', 'title', 'video', 'xmp']);\n  /* Tags that are safe for data: URIs */\n  let DATA_URI_TAGS = null;\n  const DEFAULT_DATA_URI_TAGS = addToSet({}, ['audio', 'video', 'img', 'source', 'image', 'track']);\n  /* Attributes safe for values like \"javascript:\" */\n  let URI_SAFE_ATTRIBUTES = null;\n  const DEFAULT_URI_SAFE_ATTRIBUTES = addToSet({}, ['alt', 'class', 'for', 'id', 'label', 'name', 'pattern', 'placeholder', 'role', 'summary', 'title', 'value', 'style', 'xmlns']);\n  const MATHML_NAMESPACE = 'http://www.w3.org/1998/Math/MathML';\n  const SVG_NAMESPACE = 'http://www.w3.org/2000/svg';\n  const HTML_NAMESPACE = 'http://www.w3.org/1999/xhtml';\n  /* Document namespace */\n  let NAMESPACE = HTML_NAMESPACE;\n  let IS_EMPTY_INPUT = false;\n  /* Allowed XHTML+XML namespaces */\n  let ALLOWED_NAMESPACES = null;\n  const DEFAULT_ALLOWED_NAMESPACES = addToSet({}, [MATHML_NAMESPACE, SVG_NAMESPACE, HTML_NAMESPACE], stringToString);\n  const DEFAULT_MATHML_TEXT_INTEGRATION_POINTS = freeze(['mi', 'mo', 'mn', 'ms', 'mtext']);\n  let MATHML_TEXT_INTEGRATION_POINTS = addToSet({}, DEFAULT_MATHML_TEXT_INTEGRATION_POINTS);\n  const DEFAULT_HTML_INTEGRATION_POINTS = freeze(['annotation-xml']);\n  let HTML_INTEGRATION_POINTS = addToSet({}, DEFAULT_HTML_INTEGRATION_POINTS);\n  // Certain elements are allowed in both SVG and HTML\n  // namespace. We need to specify them explicitly\n  // so that they don't get erroneously deleted from\n  // HTML namespace.\n  const COMMON_SVG_AND_HTML_ELEMENTS = addToSet({}, ['title', 'style', 'font', 'a', 'script']);\n  /* Parsing of strict XHTML documents */\n  let PARSER_MEDIA_TYPE = null;\n  const SUPPORTED_PARSER_MEDIA_TYPES = ['application/xhtml+xml', 'text/html'];\n  const DEFAULT_PARSER_MEDIA_TYPE = 'text/html';\n  let transformCaseFunc = null;\n  /* Keep a reference to config to pass to hooks */\n  let CONFIG = null;\n  /* Ideally, do not touch anything below this line */\n  /* ______________________________________________ */\n  const formElement = document.createElement('form');\n  const isRegexOrFunction = function isRegexOrFunction(testValue) {\n    return testValue instanceof RegExp || testValue instanceof Function;\n  };\n  /**\n   * _parseConfig\n   *\n   * @param cfg optional config literal\n   */\n  // eslint-disable-next-line complexity\n  const _parseConfig = function _parseConfig() {\n    let cfg = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : {};\n    if (CONFIG && CONFIG === cfg) {\n      return;\n    }\n    /* Shield configuration object from tampering */\n    if (!cfg || typeof cfg !== 'object') {\n      cfg = {};\n    }\n    /* Shield configuration object from prototype pollution */\n    cfg = clone(cfg);\n    PARSER_MEDIA_TYPE =\n    // eslint-disable-next-line unicorn/prefer-includes\n    SUPPORTED_PARSER_MEDIA_TYPES.indexOf(cfg.PARSER_MEDIA_TYPE) === -1 ? DEFAULT_PARSER_MEDIA_TYPE : cfg.PARSER_MEDIA_TYPE;\n    // HTML tags and attributes are not case-sensitive, converting to lowercase. Keeping XHTML as is.\n    transformCaseFunc = PARSER_MEDIA_TYPE === 'application/xhtml+xml' ? stringToString : stringToLowerCase;\n    /* Set configuration parameters */\n    ALLOWED_TAGS = _resolveSetOption(cfg, 'ALLOWED_TAGS', DEFAULT_ALLOWED_TAGS, {\n      transform: transformCaseFunc\n    });\n    ALLOWED_ATTR = _resolveSetOption(cfg, 'ALLOWED_ATTR', DEFAULT_ALLOWED_ATTR, {\n      transform: transformCaseFunc\n    });\n    ALLOWED_NAMESPACES = _resolveSetOption(cfg, 'ALLOWED_NAMESPACES', DEFAULT_ALLOWED_NAMESPACES, {\n      transform: stringToString\n    });\n    URI_SAFE_ATTRIBUTES = _resolveSetOption(cfg, 'ADD_URI_SAFE_ATTR', DEFAULT_URI_SAFE_ATTRIBUTES, {\n      transform: transformCaseFunc,\n      base: DEFAULT_URI_SAFE_ATTRIBUTES\n    });\n    DATA_URI_TAGS = _resolveSetOption(cfg, 'ADD_DATA_URI_TAGS', DEFAULT_DATA_URI_TAGS, {\n      transform: transformCaseFunc,\n      base: DEFAULT_DATA_URI_TAGS\n    });\n    FORBID_CONTENTS = _resolveSetOption(cfg, 'FORBID_CONTENTS', DEFAULT_FORBID_CONTENTS, {\n      transform: transformCaseFunc\n    });\n    FORBID_TAGS = _resolveSetOption(cfg, 'FORBID_TAGS', clone({}), {\n      transform: transformCaseFunc\n    });\n    FORBID_ATTR = _resolveSetOption(cfg, 'FORBID_ATTR', clone({}), {\n      transform: transformCaseFunc\n    });\n    USE_PROFILES = objectHasOwnProperty(cfg, 'USE_PROFILES') ? cfg.USE_PROFILES && typeof cfg.USE_PROFILES === 'object' ? clone(cfg.USE_PROFILES) : cfg.USE_PROFILES : false;\n    ALLOW_ARIA_ATTR = cfg.ALLOW_ARIA_ATTR !== false; // Default true\n    ALLOW_DATA_ATTR = cfg.ALLOW_DATA_ATTR !== false; // Default true\n    ALLOW_UNKNOWN_PROTOCOLS = cfg.ALLOW_UNKNOWN_PROTOCOLS || false; // Default false\n    ALLOW_SELF_CLOSE_IN_ATTR = cfg.ALLOW_SELF_CLOSE_IN_ATTR !== false; // Default true\n    SAFE_FOR_TEMPLATES = cfg.SAFE_FOR_TEMPLATES || false; // Default false\n    SAFE_FOR_XML = cfg.SAFE_FOR_XML !== false; // Default true\n    WHOLE_DOCUMENT = cfg.WHOLE_DOCUMENT || false; // Default false\n    RETURN_DOM = cfg.RETURN_DOM || false; // Default false\n    RETURN_DOM_FRAGMENT = cfg.RETURN_DOM_FRAGMENT || false; // Default false\n    RETURN_TRUSTED_TYPE = cfg.RETURN_TRUSTED_TYPE || false; // Default false\n    FORCE_BODY = cfg.FORCE_BODY || false; // Default false\n    SANITIZE_DOM = cfg.SANITIZE_DOM !== false; // Default true\n    SANITIZE_NAMED_PROPS = cfg.SANITIZE_NAMED_PROPS || false; // Default false\n    KEEP_CONTENT = cfg.KEEP_CONTENT !== false; // Default true\n    IN_PLACE = cfg.IN_PLACE || false; // Default false\n    IS_ALLOWED_URI$1 = isRegex(cfg.ALLOWED_URI_REGEXP) ? cfg.ALLOWED_URI_REGEXP : IS_ALLOWED_URI; // Default regexp\n    NAMESPACE = typeof cfg.NAMESPACE === 'string' ? cfg.NAMESPACE : HTML_NAMESPACE; // Default HTML namespace\n    MATHML_TEXT_INTEGRATION_POINTS = _resolveObjectOption(cfg, 'MATHML_TEXT_INTEGRATION_POINTS', () => addToSet({}, DEFAULT_MATHML_TEXT_INTEGRATION_POINTS) // Default built-in map\n    );\n    HTML_INTEGRATION_POINTS = _resolveObjectOption(cfg, 'HTML_INTEGRATION_POINTS', () => addToSet({}, DEFAULT_HTML_INTEGRATION_POINTS) // Default built-in map\n    );\n    const customElementHandling = _resolveObjectOption(cfg, 'CUSTOM_ELEMENT_HANDLING', () => create(null));\n    CUSTOM_ELEMENT_HANDLING = create(null);\n    if (objectHasOwnProperty(customElementHandling, 'tagNameCheck') && isRegexOrFunction(customElementHandling.tagNameCheck)) {\n      CUSTOM_ELEMENT_HANDLING.tagNameCheck = customElementHandling.tagNameCheck; // Default undefined\n    }\n    if (objectHasOwnProperty(customElementHandling, 'attributeNameCheck') && isRegexOrFunction(customElementHandling.attributeNameCheck)) {\n      CUSTOM_ELEMENT_HANDLING.attributeNameCheck = customElementHandling.attributeNameCheck; // Default undefined\n    }\n    if (objectHasOwnProperty(customElementHandling, 'allowCustomizedBuiltInElements') && typeof customElementHandling.allowCustomizedBuiltInElements === 'boolean') {\n      CUSTOM_ELEMENT_HANDLING.allowCustomizedBuiltInElements = customElementHandling.allowCustomizedBuiltInElements; // Default undefined\n    }\n    seal(CUSTOM_ELEMENT_HANDLING);\n    if (SAFE_FOR_TEMPLATES) {\n      ALLOW_DATA_ATTR = false;\n    }\n    if (RETURN_DOM_FRAGMENT) {\n      RETURN_DOM = true;\n    }\n    /* Parse profile info */\n    if (USE_PROFILES) {\n      ALLOWED_TAGS = addToSet({}, text);\n      ALLOWED_ATTR = create(null);\n      if (USE_PROFILES.html === true) {\n        addToSet(ALLOWED_TAGS, html$1);\n        addToSet(ALLOWED_ATTR, html);\n      }\n      if (USE_PROFILES.svg === true) {\n        addToSet(ALLOWED_TAGS, svg$1);\n        addToSet(ALLOWED_ATTR, svg);\n        addToSet(ALLOWED_ATTR, xml);\n      }\n      if (USE_PROFILES.svgFilters === true) {\n        addToSet(ALLOWED_TAGS, svgFilters);\n        addToSet(ALLOWED_ATTR, svg);\n        addToSet(ALLOWED_ATTR, xml);\n      }\n      if (USE_PROFILES.mathMl === true) {\n        addToSet(ALLOWED_TAGS, mathMl$1);\n        addToSet(ALLOWED_ATTR, mathMl);\n        addToSet(ALLOWED_ATTR, xml);\n      }\n    }\n    /* Always reset function-based ADD_TAGS / ADD_ATTR checks to prevent\n     * leaking across calls when switching from function to array config */\n    EXTRA_ELEMENT_HANDLING.tagCheck = null;\n    EXTRA_ELEMENT_HANDLING.attributeCheck = null;\n    /* Merge configuration parameters */\n    if (objectHasOwnProperty(cfg, 'ADD_TAGS')) {\n      if (typeof cfg.ADD_TAGS === 'function') {\n        EXTRA_ELEMENT_HANDLING.tagCheck = cfg.ADD_TAGS;\n      } else if (arrayIsArray(cfg.ADD_TAGS)) {\n        if (ALLOWED_TAGS === DEFAULT_ALLOWED_TAGS) {\n          ALLOWED_TAGS = clone(ALLOWED_TAGS);\n        }\n        addToSet(ALLOWED_TAGS, cfg.ADD_TAGS, transformCaseFunc);\n      }\n    }\n    if (objectHasOwnProperty(cfg, 'ADD_ATTR')) {\n      if (typeof cfg.ADD_ATTR === 'function') {\n        EXTRA_ELEMENT_HANDLING.attributeCheck = cfg.ADD_ATTR;\n      } else if (arrayIsArray(cfg.ADD_ATTR)) {\n        if (ALLOWED_ATTR === DEFAULT_ALLOWED_ATTR) {\n          ALLOWED_ATTR = clone(ALLOWED_ATTR);\n        }\n        addToSet(ALLOWED_ATTR, cfg.ADD_ATTR, transformCaseFunc);\n      }\n    }\n    if (objectHasOwnProperty(cfg, 'ADD_FORBID_CONTENTS') && arrayIsArray(cfg.ADD_FORBID_CONTENTS)) {\n      if (FORBID_CONTENTS === DEFAULT_FORBID_CONTENTS) {\n        FORBID_CONTENTS = clone(FORBID_CONTENTS);\n      }\n      addToSet(FORBID_CONTENTS, cfg.ADD_FORBID_CONTENTS, transformCaseFunc);\n    }\n    /* Add #text in case KEEP_CONTENT is set to true */\n    if (KEEP_CONTENT) {\n      ALLOWED_TAGS['#text'] = true;\n    }\n    /* Add html, head and body to ALLOWED_TAGS in case WHOLE_DOCUMENT is true */\n    if (WHOLE_DOCUMENT) {\n      addToSet(ALLOWED_TAGS, ['html', 'head', 'body']);\n    }\n    /* Add tbody to ALLOWED_TAGS in case tables are permitted, see #286, #365 */\n    if (ALLOWED_TAGS.table) {\n      addToSet(ALLOWED_TAGS, ['tbody']);\n      delete FORBID_TAGS.tbody;\n    }\n    // Re-derive the active Trusted Types policy from this configuration on\n    // every parse. The active policy must never be sticky closure state that\n    // outlives the config that set it: a caller-supplied policy left in place\n    // after `clearConfig()` — or after a later call that supplied none, or\n    // `TRUSTED_TYPES_POLICY: null` — could sign a subsequent \"default\"\n    // `RETURN_TRUSTED_TYPE` result with a foreign, possibly unsafe policy.\n    // See GHSA-vxr8-fq34-vvx9.\n    if (cfg.TRUSTED_TYPES_POLICY) {\n      if (typeof cfg.TRUSTED_TYPES_POLICY.createHTML !== 'function') {\n        throw typeErrorCreate('TRUSTED_TYPES_POLICY configuration option must provide a \"createHTML\" hook.');\n      }\n      if (typeof cfg.TRUSTED_TYPES_POLICY.createScriptURL !== 'function') {\n        throw typeErrorCreate('TRUSTED_TYPES_POLICY configuration option must provide a \"createScriptURL\" hook.');\n      }\n      // A caller-supplied policy applies to this configuration only.\n      const previousTrustedTypesPolicy = trustedTypesPolicy;\n      trustedTypesPolicy = cfg.TRUSTED_TYPES_POLICY;\n      // Sign local variables required by `sanitize`. If the supplied policy's\n      // `createHTML` is circular (i.e. it calls `DOMPurify.sanitize`), this\n      // throws via the re-entrancy guard. Restore the previous policy first so\n      // the instance is not left in a poisoned state. See #1422.\n      try {\n        emptyHTML = _createTrustedHTML('');\n      } catch (error) {\n        trustedTypesPolicy = previousTrustedTypesPolicy;\n        throw error;\n      }\n    } else if (cfg.TRUSTED_TYPES_POLICY === null) {\n      // Explicit opt-out for this call: perform no Trusted Types signing and\n      // create nothing (so a strict `trusted-types` CSP that disallows a\n      // `dompurify` policy can still call `sanitize` from inside its own\n      // policy — see #1422). Resetting to `undefined` rather than a sticky\n      // `null` also drops any previously retained caller policy, so it cannot\n      // resurface on a later call, while still allowing the next config-less\n      // call to restore the internal default policy. See GHSA-vxr8-fq34-vvx9.\n      trustedTypesPolicy = undefined;\n      emptyHTML = '';\n    } else {\n      // No policy supplied: keep the currently active policy if one is set — a\n      // previously supplied policy is intentionally sticky across config-less\n      // calls — otherwise fall back to the instance's own internal policy,\n      // created at most once. (A policy supplied for a *single* call still\n      // lingers by design; what must not linger is a policy whose configuration\n      // has been torn down via `clearConfig()`, which restores the default.)\n      if (trustedTypesPolicy === undefined) {\n        trustedTypesPolicy = _getDefaultTrustedTypesPolicy();\n      }\n      // Sign internal variables only when a policy is active. A falsy policy\n      // (Trusted Types unsupported, creation failed, or an explicit opt-out)\n      // leaves `emptyHTML` as a plain string, so we never call `.createHTML` on\n      // a non-policy and throw. See #1422.\n      if (trustedTypesPolicy && typeof emptyHTML === 'string') {\n        emptyHTML = _createTrustedHTML('');\n      }\n    }\n    // Prevent further manipulation of configuration.\n    // Not available in IE8, Safari 5, etc.\n    if (freeze) {\n      freeze(cfg);\n    }\n    CONFIG = cfg;\n  };\n  /* Keep track of all possible SVG and MathML tags\n   * so that we can perform the namespace checks\n   * correctly. */\n  const ALL_SVG_TAGS = addToSet({}, [...svg$1, ...svgFilters, ...svgDisallowed]);\n  const ALL_MATHML_TAGS = addToSet({}, [...mathMl$1, ...mathMlDisallowed]);\n  /**\n   * Namespace rules for an element in the SVG namespace.\n   *\n   * @param tagName the element's lowercase tag name\n   * @param parent the (possibly simulated) parent node\n   * @param parentTagName the parent's lowercase tag name\n   * @returns true if a spec-compliant parser could produce this element\n   */\n  const _checkSvgNamespace = function _checkSvgNamespace(tagName, parent, parentTagName) {\n    // The only way to switch from HTML namespace to SVG\n    // is via <svg>. If it happens via any other tag, then\n    // it should be killed.\n    if (parent.namespaceURI === HTML_NAMESPACE) {\n      return tagName === 'svg';\n    }\n    // The only way to switch from MathML to SVG is via <svg>\n    // if the parent is either <annotation-xml> or a MathML\n    // text integration point.\n    if (parent.namespaceURI === MATHML_NAMESPACE) {\n      return tagName === 'svg' && (parentTagName === 'annotation-xml' || MATHML_TEXT_INTEGRATION_POINTS[parentTagName]);\n    }\n    // We only allow elements that are defined in SVG\n    // spec. All others are disallowed in SVG namespace.\n    return Boolean(ALL_SVG_TAGS[tagName]);\n  };\n  /**\n   * Namespace rules for an element in the MathML namespace.\n   *\n   * @param tagName the element's lowercase tag name\n   * @param parent the (possibly simulated) parent node\n   * @param parentTagName the parent's lowercase tag name\n   * @returns true if a spec-compliant parser could produce this element\n   */\n  const _checkMathMlNamespace = function _checkMathMlNamespace(tagName, parent, parentTagName) {\n    // The only way to switch from HTML namespace to MathML\n    // is via <math>. If it happens via any other tag, then\n    // it should be killed.\n    if (parent.namespaceURI === HTML_NAMESPACE) {\n      return tagName === 'math';\n    }\n    // The only way to switch from SVG to MathML is via\n    // <math> and HTML integration points\n    if (parent.namespaceURI === SVG_NAMESPACE) {\n      return tagName === 'math' && HTML_INTEGRATION_POINTS[parentTagName];\n    }\n    // We only allow elements that are defined in MathML\n    // spec. All others are disallowed in MathML namespace.\n    return Boolean(ALL_MATHML_TAGS[tagName]);\n  };\n  /**\n   * Namespace rules for an element in the HTML namespace.\n   *\n   * @param tagName the element's lowercase tag name\n   * @param parent the (possibly simulated) parent node\n   * @param parentTagName the parent's lowercase tag name\n   * @returns true if a spec-compliant parser could produce this element\n   */\n  const _checkHtmlNamespace = function _checkHtmlNamespace(tagName, parent, parentTagName) {\n    // The only way to switch from SVG to HTML is via\n    // HTML integration points, and from MathML to HTML\n    // is via MathML text integration points\n    if (parent.namespaceURI === SVG_NAMESPACE && !HTML_INTEGRATION_POINTS[parentTagName]) {\n      return false;\n    }\n    if (parent.namespaceURI === MATHML_NAMESPACE && !MATHML_TEXT_INTEGRATION_POINTS[parentTagName]) {\n      return false;\n    }\n    // We disallow tags that are specific for MathML\n    // or SVG and should never appear in HTML namespace\n    return !ALL_MATHML_TAGS[tagName] && (COMMON_SVG_AND_HTML_ELEMENTS[tagName] || !ALL_SVG_TAGS[tagName]);\n  };\n  /**\n   * @param element a DOM element whose namespace is being checked\n   * @returns Return false if the element has a\n   *  namespace that a spec-compliant parser would never\n   *  return. Return true otherwise.\n   */\n  const _checkValidNamespace = function _checkValidNamespace(element) {\n    let parent = getParentNode(element);\n    // In JSDOM, if we're inside shadow DOM, then parentNode\n    // can be null. We just simulate parent in this case.\n    if (!parent || !parent.tagName) {\n      parent = {\n        namespaceURI: NAMESPACE,\n        tagName: 'template'\n      };\n    }\n    const tagName = stringToLowerCase(element.tagName);\n    const parentTagName = stringToLowerCase(parent.tagName);\n    if (!ALLOWED_NAMESPACES[element.namespaceURI]) {\n      return false;\n    }\n    if (element.namespaceURI === SVG_NAMESPACE) {\n      return _checkSvgNamespace(tagName, parent, parentTagName);\n    }\n    if (element.namespaceURI === MATHML_NAMESPACE) {\n      return _checkMathMlNamespace(tagName, parent, parentTagName);\n    }\n    if (element.namespaceURI === HTML_NAMESPACE) {\n      return _checkHtmlNamespace(tagName, parent, parentTagName);\n    }\n    // For XHTML and XML documents that support custom namespaces\n    if (PARSER_MEDIA_TYPE === 'application/xhtml+xml' && ALLOWED_NAMESPACES[element.namespaceURI]) {\n      return true;\n    }\n    // The code should never reach this place (this means\n    // that the element somehow got namespace that is not\n    // HTML, SVG, MathML or allowed via ALLOWED_NAMESPACES).\n    // Return false just in case.\n    return false;\n  };\n  /**\n   * _forceRemove\n   *\n   * @param node a DOM node\n   */\n  const _forceRemove = function _forceRemove(node) {\n    arrayPush(DOMPurify.removed, {\n      element: node\n    });\n    try {\n      // eslint-disable-next-line unicorn/prefer-dom-node-remove\n      getParentNode(node).removeChild(node);\n    } catch (_) {\n      /* The normal detach failed — this is reached for a parentless node\n         (getParentNode() is null, so .removeChild throws). Element.prototype\n         .remove() is itself a spec no-op on a parentless node, so a recorded\n         \"removal\" would otherwise hand the caller back an intact,\n         payload-bearing node (e.g. a detached IN_PLACE root the mXSS canary or\n         the style-with-element-child rule decided to kill). Fail closed by\n         throwing — exactly as a clobbered root does at the IN_PLACE entry —\n         rather than trying to \"neutralize\" the node via its own methods.\n         Neutralizing would mean calling getAttributeNames()/removeAttribute()\n         on the node, both of which a <form> root can clobber via a named child\n         (and _isClobbered does not even probe getAttributeNames), so the\n         neutralize step could itself be silently defeated, leaving the payload\n         intact. A throw touches only the cached, clobber-safe remove() and\n         getParentNode(). Generalizes GHSA-r47g-fvhr-h676 (clobbered-form root)\n         to every root-kill reason. REPORT-3.\n                This lives inside the catch, so it never fires for a normally-removed\n         in-tree node: those have a parent, removeChild() succeeds, and the\n         catch is not entered. Only a kept (parentless) root reaches here. */\n      remove(node);\n      if (!getParentNode(node)) {\n        throw typeErrorCreate('a node selected for removal could not be detached from its tree ' + 'and cannot be safely returned; refusing to sanitize in place');\n      }\n    }\n  };\n  /**\n   * _stripAttributeNode\n   *\n   * Remove a single Attr node case/namespace-exactly on an attribute-teardown\n   * path. Name-based removeAttribute() ASCII-lowercases its lookup key for an\n   * HTML element in an HTML document and so silently misses a case-preserved\n   * handler (e.g. `ONERROR` off an XML/XHTML import) - the same defect\n   * _removeAttribute() was fixed for, which a name-based call would reintroduce\n   * on these IN_PLACE teardown paths. Unlike _removeAttribute this does not\n   * record into DOMPurify.removed: the neutralize passes intentionally do not\n   * book-keep. A clobbered/detached node falls back to best-effort name-based\n   * removal.\n   *\n   * @param element the element to strip the attribute from\n   * @param attribute the Attr node to remove\n   * @param name the attribute's name, for the fallback path\n   */\n  const _stripAttributeNode = function _stripAttributeNode(element, attribute, name) {\n    try {\n      removeAttributeNode(element, attribute);\n    } catch (_) {\n      try {\n        element.removeAttribute(name);\n      } catch (_) {}\n    }\n  };\n  /**\n   * _neutralizeRoot\n   *\n   * Fail-closed teardown of an in-place root after the sanitize walk aborts\n   * (campaign-3 F2). An internal throw mid-walk — e.g. a page-registered\n   * custom element's reaction detaches a node so `_forceRemove`'s deliberate\n   * parentless guard throws, or any other re-entrant engine mutation — would\n   * otherwise leave the caller's *live* tree half-sanitized, with everything\n   * after the abort point still carrying its handlers. There is no safe way\n   * to resume the walk (the tree mutated under us), so we strip the root bare:\n   * remove every child and every attribute, then let the caller's catch see\n   * the original error. Clobber-safe (cached `remove`/`childNodes`/`attributes`\n   * getters; the root was already clobber-pre-flighted at the IN_PLACE entry).\n   *\n   * @param root the in-place root to empty\n   */\n  const _neutralizeRoot = function _neutralizeRoot(root) {\n    /* Strip every disallowed attribute (on* handlers included) off the whole\n       subtree BEFORE detaching anything. Detaching first would hand back\n       handler-bearing originals (e.g. an already-loading `<img onerror>`)\n       whose queued resource event still fires in page scope after we throw.\n       Clobber-safe reads; a doomed clobbered node's own attributes are\n       irrelevant while its non-clobbered descendants are reached and scrubbed. */\n    _neutralizeSubtree(root);\n    const childNodes = getChildNodes(root);\n    if (childNodes) {\n      const snapshot = [];\n      arrayForEach(childNodes, child => {\n        arrayPush(snapshot, child);\n      });\n      arrayForEach(snapshot, child => {\n        try {\n          remove(child);\n        } catch (_) {\n          /* Best-effort teardown; a still-attached child is handled below */\n        }\n      });\n    }\n    const attributes = getAttributes(root);\n    if (attributes) {\n      for (let i = attributes.length - 1; i >= 0; --i) {\n        const attribute = attributes[i];\n        const name = attribute && attribute.name;\n        if (typeof name === 'string') {\n          _stripAttributeNode(root, attribute, name);\n        }\n      }\n    }\n  };\n  /**\n   * _removeAttribute\n   *\n   * Name-based getAttributeNode()/removeAttribute() ASCII-lowercase their\n   * lookup key for HTML elements in an HTML document, so they silently miss an\n   * attribute whose stored qualified name still contains uppercase ASCII\n   * letters. That happens when the node came from a case-preserving source\n   * (an XML/XHTML document imported via importNode(), or createAttributeNS()),\n   * where e.g. `ONERROR` survives the walk: the policy check lowercases to\n   * `onerror` and rejects it, but `removeAttribute('ONERROR')` looks up\n   * `onerror` and finds nothing. Remove the exact Attr node instead, which is\n   * case- and namespace-exact, and fall back to name-based removal only when\n   * the caller could not supply the node.\n   *\n   * @param name an Attribute name\n   * @param element a DOM node\n   * @param attr the exact Attr node to remove, when the caller has it\n   */\n  const _removeAttribute = function _removeAttribute(name, element, attr) {\n    if (!attr) {\n      try {\n        attr = element.getAttributeNode(name);\n      } catch (_) {\n        attr = null;\n      }\n    }\n    arrayPush(DOMPurify.removed, {\n      attribute: attr || null,\n      from: element\n    });\n    try {\n      if (attr) {\n        removeAttributeNode(element, attr);\n      } else {\n        element.removeAttribute(name);\n      }\n    } catch (_) {\n      /* Clobbered or already-detached node - best-effort fall back to a\n         name-based removal so the \"is\" handling below still runs. Note this\n         fallback ASCII-lowercases its lookup key in an HTML document and so\n         cannot reach a case-preserved attribute name; the cached\n         removeAttributeNode() above is what removes those, and a clobbered\n         form is already removed wholesale by _isClobbered() before reaching\n         here. */\n      try {\n        element.removeAttribute(name);\n      } catch (_) {}\n    }\n    // We void attribute values for unremovable \"is\" attributes\n    if (name === 'is') {\n      if (RETURN_DOM || RETURN_DOM_FRAGMENT) {\n        try {\n          _forceRemove(element);\n        } catch (_) {}\n      } else {\n        try {\n          element.setAttribute(name, '');\n        } catch (_) {}\n      }\n    }\n  };\n  /**\n   * _stripDisallowedAttributes\n   *\n   * Removes every attribute the active configuration does not allow from a\n   * single element, using the same allowlist as the main attribute pass (so\n   * `on*` handlers go, but no `/^on/` blocklist is introduced). Used only to\n   * neutralise nodes that are being discarded from an in-place tree.\n   *\n   * @param element the element to strip\n   */\n  const _stripDisallowedAttributes = function _stripDisallowedAttributes(element) {\n    const attributes = getAttributes(element);\n    if (!attributes) {\n      return;\n    }\n    for (let i = attributes.length - 1; i >= 0; --i) {\n      const attribute = attributes[i];\n      const name = attribute && attribute.name;\n      if (typeof name !== 'string' || ALLOWED_ATTR[transformCaseFunc(name)]) {\n        continue;\n      }\n      _stripAttributeNode(element, attribute, name);\n    }\n  };\n  /**\n   * _neutralizeSubtree\n   *\n   * Completes the audit-5 F1 fix across every removal path. The KEEP_CONTENT\n   * move-hoist neutralises only disallowed-tag removals; clobber, mXSS-canary,\n   * namespace, comment, processing-instruction and KEEP_CONTENT:false removals\n   * all drop their subtree wholesale via `_forceRemove`. On the IN_PLACE path\n   * those dropped nodes are detached from the caller's LIVE tree but a\n   * handler-bearing original among them (an `<img onerror>`/`<video>` that was\n   * loading) keeps its queued resource event, which fires in page scope after\n   * sanitize returns. This walks a removed subtree and strips every attribute\n   * the active configuration does not allow — so `on*` handlers are cancelled\n   * through the SAME allowlist that governs kept nodes, not a separate `/^on/`\n   * blocklist. Run synchronously before sanitize returns, i.e. before any\n   * queued event can fire. Hook-free by design: these nodes leave the output,\n   * so firing attribute hooks for them would be surprising. Clobber-safe reads;\n   * a doomed clobbered node may shadow `removeAttribute` (its own attributes are\n   * irrelevant — it is discarded — while its non-clobbered descendants, e.g.\n   * the `<img>`, are reached and scrubbed).\n   *\n   * @param root the root of a removed subtree to neutralise\n   */\n  const _neutralizeSubtree = function _neutralizeSubtree(root) {\n    const stack = [root];\n    while (stack.length > 0) {\n      const node = stack.pop();\n      const nodeType = _readNodeType(node);\n      if (nodeType === NODE_TYPE.element) {\n        _stripDisallowedAttributes(node);\n      }\n      const childNodes = getChildNodes(node);\n      if (childNodes) {\n        for (let i = childNodes.length - 1; i >= 0; --i) {\n          stack.push(childNodes[i]);\n        }\n      }\n    }\n  };\n  /**\n   * _neutralizePatchLinkage\n   *\n   * IN_PLACE entry pre-pass (declarative-partial-updates / streaming\n   * hardening, https://github.com/WICG/declarative-partial-updates).\n   *\n   * The main walk strips patch linkage (`for`/`patchsrc`) and removes range\n   * markers (PIs / markup comments) node-by-node, in document order, AS it\n   * reaches each node. On a live in-place root that leaves a window: from the\n   * moment the root is connected until the walk arrives at a given node, that\n   * node's linkage is live. A patch applied on connection/stream can fire as\n   * a microtask during the walk and inject or teleport an unsanitized DOM\n   * range into a region the iterator has already passed and will not revisit,\n   * so the post-return \"tree is sanitized\" contract is violated. Sweep the\n   * whole tree once up front and sever every linkage before the walk begins,\n   * closing that window.\n   *\n   * This CANNOT undo a patch that already fired before sanitize ran — that is\n   * the irreducible \"do not IN_PLACE a live-connected attacker tree\" caveat —\n   * but it closes everything from sanitize-start onward. Gated on SAFE_FOR_XML\n   * to group with the rest of the declarative-partial-updates handling and\n   * stay overridable, consistent with the codebase.\n   *\n   * Clobber-safe traversal (cached childNodes getter); per-node try/catch so a\n   * clobbered root cannot defeat the sweep of its non-clobbered descendants.\n   *\n   * NOTE (pending real-Chrome confirmation, see test/declarative-patch-probe\n   * .html Q1): this mirrors the existing policy of keeping `for` on\n   * <label>/<output>. If the shipping feature can drive a patch through a\n   * surviving `for`-on-label/output + `id` pair, this pre-pass and the\n   * attribute check at _isBasicCustomElement's caller must additionally drop\n   * that pair on the IN_PLACE path. Left as-is until the taxonomy is verified.\n   *\n   * @param root the in-place root to sweep\n   */\n  /**\n   * Central policy for declarative-partial-updates patch-linkage attributes,\n   * shared by the _neutralizePatchLinkage pre-pass and _isValidAttribute so\n   * the two sites cannot drift: `patchsrc` always links, `for` links\n   * everywhere except on <label>/<output>, and the whole policy is gated on\n   * SAFE_FOR_XML (see the rationale block in _isValidAttribute).\n   *\n   * @param lcName the transformCaseFunc'd attribute name\n   * @param lcTag the transformCaseFunc'd tag name of the carrying element\n   * @return true if the attribute is patch linkage and must be dropped\n   */\n  const _isPatchLinkageAttribute = function _isPatchLinkageAttribute(lcName, lcTag) {\n    if (!SAFE_FOR_XML) {\n      return false;\n    }\n    if (lcName === 'patchsrc') {\n      return true;\n    }\n    return lcName === 'for' && lcTag !== 'label' && lcTag !== 'output';\n  };\n  const _neutralizePatchLinkage = function _neutralizePatchLinkage(root) {\n    if (!SAFE_FOR_XML) {\n      return;\n    }\n    const stack = [root];\n    while (stack.length > 0) {\n      const node = stack.pop();\n      const nodeType = _readNodeType(node);\n      /* Remove range markers (the target side of a patch linkage): every\n         processing instruction, and any markup-bearing comment. */\n      if (nodeType === NODE_TYPE.processingInstruction || nodeType === NODE_TYPE.comment && regExpTest(COMMENT_MARKUP_PROBE, node.data)) {\n        try {\n          remove(node);\n        } catch (_) {\n          /* Best-effort */\n        }\n        continue;\n      }\n      /* Strip patch-source attributes (the source side) off elements. */\n      if (nodeType === NODE_TYPE.element) {\n        const element = node;\n        const lcTag = transformCaseFunc(_readNodeName(node));\n        try {\n          if (element.hasAttribute && element.hasAttribute('patchsrc')) {\n            element.removeAttribute('patchsrc');\n          }\n          if (element.hasAttribute && element.hasAttribute('for') && _isPatchLinkageAttribute('for', lcTag)) {\n            element.removeAttribute('for');\n          }\n        } catch (_) {\n          /* Clobbered removeAttribute/hasAttribute on a doomed node — ignore */\n        }\n      }\n      const childNodes = getChildNodes(node);\n      if (childNodes) {\n        for (let i = childNodes.length - 1; i >= 0; --i) {\n          stack.push(childNodes[i]);\n        }\n      }\n    }\n  };\n  /**\n   * _initDocument\n   *\n   * @param dirty - a string of dirty markup\n   * @return a DOM, filled with the dirty markup\n   */\n  const _initDocument = function _initDocument(dirty) {\n    /* Create a HTML document */\n    let doc = null;\n    let leadingWhitespace = null;\n    if (FORCE_BODY) {\n      dirty = '<remove></remove>' + dirty;\n    } else {\n      /* If FORCE_BODY isn't used, leading whitespace needs to be preserved manually */\n      const matches = stringMatch(dirty, /^[\\r\\n\\t ]+/);\n      leadingWhitespace = matches && matches[0];\n    }\n    if (PARSER_MEDIA_TYPE === 'application/xhtml+xml' && NAMESPACE === HTML_NAMESPACE) {\n      // Root of XHTML doc must contain xmlns declaration (see https://www.w3.org/TR/xhtml1/normative.html#strict)\n      dirty = '<html xmlns=\"http://www.w3.org/1999/xhtml\"><head></head><body>' + dirty + '</body></html>';\n    }\n    const dirtyPayload = trustedTypesPolicy ? _createTrustedHTML(dirty) : dirty;\n    /*\n     * Use the DOMParser API by default, fallback later if needs be\n     * DOMParser not work for svg when has multiple root element.\n     */\n    if (NAMESPACE === HTML_NAMESPACE) {\n      try {\n        doc = new DOMParser().parseFromString(dirtyPayload, PARSER_MEDIA_TYPE);\n      } catch (_) {}\n    }\n    /* Use createHTMLDocument in case DOMParser is not available */\n    if (!doc || !doc.documentElement) {\n      doc = implementation.createDocument(NAMESPACE, 'template', null);\n      try {\n        doc.documentElement.innerHTML = IS_EMPTY_INPUT ? emptyHTML : dirtyPayload;\n      } catch (_) {\n        // Syntax error if dirtyPayload is invalid xml\n      }\n    }\n    const body = doc.body || doc.documentElement;\n    if (dirty && leadingWhitespace) {\n      body.insertBefore(document.createTextNode(leadingWhitespace), body.childNodes[0] || null);\n    }\n    /* Work on whole document or just its body */\n    if (NAMESPACE === HTML_NAMESPACE) {\n      return getElementsByTagName.call(doc, WHOLE_DOCUMENT ? 'html' : 'body')[0];\n    }\n    return WHOLE_DOCUMENT ? doc.documentElement : body;\n  };\n  /**\n   * Creates a NodeIterator object that you can use to traverse filtered lists of nodes or elements in a document.\n   *\n   * @param root The root element or node to start traversing on.\n   * @return The created NodeIterator\n   */\n  const _createNodeIterator = function _createNodeIterator(root) {\n    /* Read ownerDocument through the cached Node.prototype getter, never the\n       direct property. HTMLFormElement has [LegacyOverrideBuiltIns], so a\n       clobbering child (<input name=\"ownerDocument\"> or a form-associated\n       external input) shadows the prototype getter and makes a direct read\n       return that <input>. createNodeIterator.call(<input>, ...) then throws\n       \"Illegal invocation\", and on the IN_PLACE path that throw lands before\n       the walk's fail-closed barrier - leaving the caller's live tree, with\n       any already-armed handler in it, un-neutralized. The cached getter\n       returns the real Document regardless of the clobber. */\n    const doc = getOwnerDocument ? getOwnerDocument(root) : root.ownerDocument;\n    return createNodeIterator.call(doc || root, root,\n    // eslint-disable-next-line no-bitwise\n    NodeFilter.SHOW_ELEMENT | NodeFilter.SHOW_COMMENT | NodeFilter.SHOW_TEXT | NodeFilter.SHOW_PROCESSING_INSTRUCTION | NodeFilter.SHOW_CDATA_SECTION, null);\n  };\n  /**\n   * Replace template expression syntax (mustache, ERB, template\n   * literal) with a space; shared by all SAFE_FOR_TEMPLATES scrub\n   * sites. Order matters: mustache, then ERB, then template literal.\n   *\n   * @param value the string to scrub\n   * @returns the scrubbed string\n   */\n  const _stripTemplateExpressions = function _stripTemplateExpressions(value) {\n    value = stringReplace(value, MUSTACHE_EXPR$1, ' ');\n    value = stringReplace(value, ERB_EXPR$1, ' ');\n    value = stringReplace(value, TMPLIT_EXPR$1, ' ');\n    return value;\n  };\n  /**\n   * Strip template-engine expressions ({{...}}, ${...}, <%...%>) from the\n   * character data of an element subtree. Used as the final safety net for\n   * SAFE_FOR_TEMPLATES on every DOM-returning code path so that expressions\n   * which only form after text-node normalization (e.g. fragments split across\n   * stripped elements) cannot survive into a template-evaluating framework.\n   *\n   * Walks text/comment/CDATA/processing-instruction nodes and mutates `.data`\n   * in place rather than round-tripping through innerHTML. This preserves\n   * descendant node references (important for IN_PLACE callers), avoids a\n   * serialize/reparse cycle, and reads literal character data — which means\n   * `<%...%>` in text content matches the ERB regex against its real bytes\n   * instead of the HTML-entity-escaped form innerHTML would produce.\n   *\n   * Attribute values are not visited here; SAFE_FOR_TEMPLATES handling for\n   * attributes is performed during the per-node `_sanitizeAttributes` pass.\n   *\n   * @param node The root element whose character data should be scrubbed.\n   */\n  const _scrubTemplateExpressions2 = function _scrubTemplateExpressions(node) {\n    var _node$querySelectorAl;\n    node.normalize();\n    /* Clobber-safe ownerDocument read, same reasoning as _createNodeIterator:\n       under SAFE_FOR_TEMPLATES this runs on the live IN_PLACE root, which may\n       carry a form-named-getter override of ownerDocument. */\n    const doc = getOwnerDocument ? getOwnerDocument(node) : node.ownerDocument;\n    const walker = createNodeIterator.call(doc || node, node,\n    // eslint-disable-next-line no-bitwise\n    NodeFilter.SHOW_TEXT | NodeFilter.SHOW_COMMENT | NodeFilter.SHOW_CDATA_SECTION | NodeFilter.SHOW_PROCESSING_INSTRUCTION, null);\n    let currentNode = walker.nextNode();\n    while (currentNode) {\n      currentNode.data = _stripTemplateExpressions(currentNode.data);\n      currentNode = walker.nextNode();\n    }\n    // NodeIterator does not descend into <template>.content per the DOM spec,\n    // so we must explicitly recurse into each template's content fragment,\n    // mirroring the approach used by _sanitizeShadowDOM.\n    const templates = (_node$querySelectorAl = node.querySelectorAll) === null || _node$querySelectorAl === void 0 ? void 0 : _node$querySelectorAl.call(node, 'template');\n    if (templates) {\n      arrayForEach(templates, tmpl => {\n        if (_isDocumentFragment(tmpl.content)) {\n          _scrubTemplateExpressions2(tmpl.content);\n        }\n      });\n    }\n  };\n  /**\n   * _isClobbered\n   *\n   * Detect DOM-clobbering on HTMLFormElement nodes. Form is the only HTML\n   * interface with [LegacyOverrideBuiltIns]; a descendant element with a\n   * `name` attribute matching a prototype property shadows that property\n   * on direct reads. We use this check at the IN_PLACE entry-point and\n   * during attribute sanitization to refuse clobbered forms.\n   *\n   * @param element element to check for clobbering attacks\n   * @return true if clobbered, false if safe\n   */\n  const _isClobbered = function _isClobbered(element) {\n    // Realm-independent tag-name probe. If we can't determine the tag\n    // name at all, we can't reason about clobbering — return false\n    // (the caller's other defences still apply).\n    const realTagName = getNodeName ? getNodeName(element) : null;\n    if (typeof realTagName !== 'string') {\n      return false;\n    }\n    if (transformCaseFunc(realTagName) !== 'form') {\n      return false;\n    }\n    return typeof element.nodeName !== 'string' || typeof element.textContent !== 'string' || typeof element.removeChild !== 'function' ||\n    // Realm-safe NamedNodeMap detection: equality against the cached\n    // prototype getter. Clobbered .attributes (e.g. <input name=\"attributes\">)\n    // makes the direct read diverge from the cached read; a clean form\n    // (same-realm OR foreign-realm) has both reads pointing at the same\n    // canonical NamedNodeMap.\n    element.attributes !== getAttributes(element) || typeof element.removeAttribute !== 'function' ||\n    // A form descendant named \"removeAttributeNode\" or \"getAttributeNode\"\n    // shadows these Attr-node methods via [LegacyOverrideBuiltIns].\n    // _removeAttribute() / _stripAttributeNode() reach for\n    // element.removeAttributeNode(attr) first; when it is shadowed the call\n    // throws and the name-based fallback element.removeAttribute(name)\n    // ASCII-lowercases its lookup key in an HTML document, silently missing\n    // a case-preserved event-handler attribute (e.g. an ONANIMATIONSTART\n    // that reached the sanitizer through an XML/XHTML parse). Flag the form\n    // so it is removed wholesale, exactly as for the other shadowed methods.\n    typeof element.removeAttributeNode !== 'function' || typeof element.getAttributeNode !== 'function' || typeof element.setAttribute !== 'function' || typeof element.namespaceURI !== 'string' || typeof element.insertBefore !== 'function' || typeof element.hasChildNodes !== 'function' ||\n    // NodeType clobbering probe. Cached Node.prototype.nodeType getter\n    // returns the integer 1 for any Element regardless of realm; direct\n    // read on a clobbered form (e.g. <input name=\"nodeType\">) returns\n    // the named child element. Cheap addition — nodeType is read from\n    // an internal slot, no serialization cost — and removes a residual\n    // clobbering surface used by several mXSS / PI / comment branches\n    // in _sanitizeElements that compare currentNode.nodeType directly.\n    element.nodeType !== getNodeType(element) ||\n    // HTMLFormElement has [LegacyOverrideBuiltIns]: a descendant named\n    // \"childNodes\" shadows the prototype getter. Direct reads of\n    // form.childNodes from a clobbered form return the named child\n    // instead of the real NodeList, so any walk that reads it directly\n    // skips the form's real children. Compare the direct read to the\n    // cached Node.prototype getter — when the form's named-property\n    // getter intercepts the read, the two values differ and we flag\n    // the form. This catches every clobbering child type (input,\n    // select, etc.) regardless of whether the named child happens to\n    // carry a numeric .length, which a typeof-based probe would miss\n    // (e.g. HTMLSelectElement.length is a defined unsigned-long).\n    element.childNodes !== getChildNodes(element);\n  };\n  /**\n   * Checks whether the given value is a DocumentFragment from any realm.\n   *\n   * The realm-independent replacement reads `nodeType` through the cached\n   * Node.prototype getter and compares to the DOCUMENT_FRAGMENT_NODE\n   * constant (11). nodeType is a numeric value resolved from the node's\n   * internal slot, identical across realms for the same kind of node.\n   *\n   * @param value object to check\n   * @return true if value is a DocumentFragment-shaped node from any realm\n   */\n  const _isDocumentFragment = function _isDocumentFragment(value) {\n    if (!getNodeType || typeof value !== 'object' || value === null) {\n      return false;\n    }\n    try {\n      return getNodeType(value) === NODE_TYPE.documentFragment;\n    } catch (_) {\n      return false;\n    }\n  };\n  /**\n   * Checks whether the given object is a DOM node, including nodes that\n   * originate from a different window/realm (e.g. an iframe's\n   * contentDocument). The previous `value instanceof Node` check was\n   * realm-bound: nodes from a different window failed it, causing\n   * sanitize() to silently stringify them and reset IN_PLACE to false,\n   * returning the original node unsanitized. See GHSA-4w3q-35jp-p934.\n   *\n   * @param value object to check whether it's a DOM node\n   * @return true if value is a DOM node from any realm\n   */\n  const _isNode = function _isNode(value) {\n    if (!getNodeType || typeof value !== 'object' || value === null) {\n      return false;\n    }\n    try {\n      return typeof getNodeType(value) === 'number';\n    } catch (_) {\n      return false;\n    }\n  };\n  function _executeHooks(hooks, currentNode, data) {\n    if (hooks.length === 0) {\n      return;\n    }\n    arrayForEach(hooks, hook => {\n      hook.call(DOMPurify, currentNode, data, CONFIG);\n    });\n  }\n  /**\n   * Structural-threat checks that condemn a node regardless of the\n   * allowlists: mXSS via namespace confusion, risky CSS construction,\n   * processing instructions, markup-bearing comments. Pure predicate;\n   * the caller removes. Check order is load-bearing.\n   *\n   * @param currentNode the node to inspect\n   * @param tagName the node's transformCaseFunc'd tag name\n   * @return true if the node must be removed\n   */\n  const _isUnsafeNode = function _isUnsafeNode(currentNode, tagName) {\n    /* Detect mXSS attempts abusing namespace confusion */\n    if (SAFE_FOR_XML && currentNode.hasChildNodes() && !_isNode(currentNode.firstElementChild) && regExpTest(ELEMENT_MARKUP_PROBE, currentNode.textContent) && regExpTest(ELEMENT_MARKUP_PROBE, currentNode.innerHTML)) {\n      return true;\n    }\n    /* Remove rawtext/literal-text elements whose literal serialization\n       re-opens markup on an HTML reparse - shapes (a) and (b) documented at\n       LITERAL_TEXT_ELEMENTS. Both are invisible to rule 1 above (which\n       self-disables once there is an element child, and whose second probe\n       reads the innerHTML an XML/XHTML document serializes escaped), which\n       is why both probes here read textContent instead. Previously only\n       `style`-with-element-child was covered; every element in\n       LITERAL_TEXT_ELEMENTS shares this literal serialization and is\n       equally affected. */\n    if (SAFE_FOR_XML && currentNode.namespaceURI === HTML_NAMESPACE && LITERAL_TEXT_ELEMENTS[tagName] && (_isNode(currentNode.firstElementChild) || typeof currentNode.textContent === 'string' && regExpTest(LITERAL_TEXT_CLOSE[tagName], currentNode.textContent))) {\n      return true;\n    }\n    /* Remove any occurrence of processing instructions */\n    if (currentNode.nodeType === NODE_TYPE.processingInstruction) {\n      return true;\n    }\n    /* Remove any kind of possibly harmful comments */\n    if (SAFE_FOR_XML && currentNode.nodeType === NODE_TYPE.comment && regExpTest(COMMENT_MARKUP_PROBE, currentNode.data)) {\n      return true;\n    }\n    return false;\n  };\n  /**\n   * Evaluate a CUSTOM_ELEMENT_HANDLING check (a RegExp or a predicate\n   * function, per the validation in _parseConfig) against a name.\n   * Additional arguments are forwarded to predicate functions - the\n   * attributeNameCheck predicate receives the tag name as its second\n   * argument. A null/absent check never matches.\n   *\n   * @param check the configured tagNameCheck / attributeNameCheck value\n   * @param name the name to test\n   * @param args extra arguments forwarded to a predicate function\n   * @return true if the check matches the name\n   */\n  const _matchesNameCheck = function _matchesNameCheck(check, name) {\n    if (check instanceof RegExp) {\n      return regExpTest(check, name);\n    }\n    if (check instanceof Function) {\n      for (var _len = arguments.length, args = new Array(_len > 2 ? _len - 2 : 0), _key = 2; _key < _len; _key++) {\n        args[_key - 2] = arguments[_key];\n      }\n      return Boolean(check(name, ...args));\n    }\n    return false;\n  };\n  /**\n   * Handle a node whose tag is forbidden or not allowlisted: keep\n   * allowed custom elements (false return exits _sanitizeElements\n   * early - the namespace and fallback-tag removal checks are\n   * intentionally skipped for kept custom elements), else hoist\n   * content per KEEP_CONTENT and remove.\n   *\n   * A kept custom element is the ONLY case in which this function\n   * returns false, so the caller uses that return value to run the\n   * afterSanitizeElements hook on the kept element and keep the\n   * element-hook lifecycle consistent with normal allowlisted\n   * elements (GHSA-c2j3-45gr-mqc4).\n   *\n   * @param currentNode the disallowed node\n   * @param tagName the node's transformCaseFunc'd tag name\n   * @return true if the node was removed, false if kept\n   */\n  const _sanitizeDisallowedNode = function _sanitizeDisallowedNode(currentNode, tagName, root) {\n    /* Check if we have a custom element to handle */\n    if (!FORBID_TAGS[tagName] && _isBasicCustomElement(tagName) && _matchesNameCheck(CUSTOM_ELEMENT_HANDLING.tagNameCheck, tagName)) {\n      return false;\n    }\n    /* Keep content except for bad-listed elements.\n         Use the cached prototype getters exclusively — the previous code\n         had `|| currentNode.parentNode` / `|| currentNode.childNodes`\n         fallbacks, but the cached getters always return the canonical\n         value (or null for a real parent-less node), so the fallback\n         path was dead in safe cases and a clobbering surface in unsafe\n         ones. Falsy cached results stay falsy; the `if (childNodes &&\n         parentNode)` check already gates correctly. */\n    if (KEEP_CONTENT && !FORBID_CONTENTS[tagName]) {\n      const parentNode = getParentNode(currentNode);\n      const childNodes = getChildNodes(currentNode);\n      if (childNodes && parentNode) {\n        const childCount = childNodes.length;\n        /* Hoist by moving each child up one level rather than deep-cloning\n             it. Moving transfers every descendant exactly once, so a chain of\n             nested disallowed elements costs O(n) instead of the O(n^2) that\n             re-cloning the shrinking subtree at each level produced; it also\n             empties the removed original, so `DOMPurify.removed` no longer\n             pins whole subtrees. Moving preserves the in-place guarantee too:\n             an original carrying already-queued resource events (`<img\n             onerror>`, `<video>`/`<audio>` error, lazy/`onload`, …) is\n             relocated and sanitised rather than left detached but still armed.\n                      The sole case that must clone is removing the walk root itself.\n             The result is serialised from the root's subtree, so a restrictive\n             ALLOWED_TAGS that strips the root (`body` on the string path) must\n             leave the content inside it, which only cloning does. In IN_PLACE\n             the root is pre-validated as an allowed tag and so is never removed\n             here, so that path always takes the move branch.\n                      `childNodes` is live; a tail-to-head walk keeps `childNodes[i]`\n             valid whether we move (drops the trailing entry) or clone (leaves\n             the list intact). */\n        for (let i = childCount - 1; i >= 0; --i) {\n          const hoisted = currentNode === root ? cloneNode(childNodes[i], true) : childNodes[i];\n          parentNode.insertBefore(hoisted, getNextSibling(currentNode));\n        }\n      }\n    }\n    _forceRemove(currentNode);\n    return true;\n  };\n  /**\n   * Fork a hook-mutable allowlist off its shared binding the first time a\n   * (possibly lazily-installed) uponSanitize* hook is about to see it, so the\n   * hook cannot widen the per-instance default or the setConfig binding by\n   * reference and leak past the call. Returns the set unchanged once it is\n   * already call-local, so repeated calls across elements are idempotent.\n   *\n   * @param hookList the uponSanitize* hook array for this event\n   * @param set the current ALLOWED_TAGS / ALLOWED_ATTR binding\n   * @param defaultSet the per-instance DEFAULT_ALLOWED_* constant\n   * @param setConfigSet the captured setConfig() binding, or null\n   * @return a call-local clone if a hook is present and set is still shared,\n   *   else set unchanged\n   */\n  const _forkSharedAllowlist = function _forkSharedAllowlist(hookList, set, defaultSet, setConfigSet) {\n    if (hookList.length === 0) {\n      return set;\n    }\n    return set === defaultSet || set === setConfigSet ? clone(set) : set;\n  };\n  /**\n   * Shared guard for a node that a hook has detached from the walk tree,\n   * used after each element-hook site in _sanitizeElements. Detaching is a\n   * long-standing user pattern (issue #469; draw.io-style foreignObject\n   * filtering). Per the cached, unclobberable parentNode getter the node is\n   * genuinely out of the tree, so it can reach neither the serialized\n   * output nor an IN_PLACE live tree; treat it as removed and stop\n   * processing it. Without this guard, the unsafe-node / namespace checks\n   * would call _forceRemove on a parentless node and hit the REPORT-3\n   * fail-closed throw — which exists for nodes DOMPurify wants gone but\n   * *cannot* detach (clobbered / parentless roots), the opposite of a node\n   * that is already safely gone. The walk root is exempt: a detached\n   * IN_PLACE root is legitimate input and must still be fully sanitized,\n   * and a kill-decision on it must keep hitting the REPORT-3 throw.\n   *\n   * Nodes detached by hooks stay the hook's responsibility for placement:\n   * they are not recorded in DOMPurify.removed, so the post-walk IN_PLACE\n   * pass (which iterates DOMPurify.removed) does not reach them. But a\n   * hook-detached subtree can still hold a queued resource-event handler -\n   * e.g. an <img onload> that began loading when the caller built the live\n   * tree - which fires in page scope after sanitize returns even though the\n   * handler never reached the returned tree. That is the audit-5 F1 hazard,\n   * and the documented node.remove() hook pattern walks straight into it.\n   * So on the IN_PLACE path we neutralize the detached subtree inline,\n   * stripping its non-allow-listed attributes before returning, exactly as\n   * the post-walk pass does for _forceRemove'd subtrees.\n   *\n   * @param currentNode the node a hook may have detached\n   * @param root the current walk root\n   * @return true if the node is detached and now handled, false otherwise\n   */\n  const _handleHookDetachedNode = function _handleHookDetachedNode(currentNode, root) {\n    if (currentNode === root || getParentNode(currentNode) !== null) {\n      return false;\n    }\n    if (IN_PLACE) {\n      _neutralizeSubtree(currentNode);\n    }\n    return true;\n  };\n  /**\n   * _sanitizeElements\n   *\n   * @protect nodeName\n   * @protect textContent\n   * @protect removeChild\n   * @param currentNode to check for permission to exist\n   * @return true if node was killed, false if left alive\n   */\n  const _sanitizeElements = function _sanitizeElements(currentNode, root) {\n    /* Execute a hook if present */\n    _executeHooks(hooks.beforeSanitizeElements, currentNode, null);\n    /* A hook may have detached the node - treat it as removed (see\n       _handleHookDetachedNode for the full rationale). */\n    if (_handleHookDetachedNode(currentNode, root)) {\n      return true;\n    }\n    /* Check if element is clobbered or can clobber */\n    if (_isClobbered(currentNode)) {\n      _forceRemove(currentNode);\n      return true;\n    }\n    /* Now let's check the element's type and name */\n    const tagName = transformCaseFunc(_readNodeName(currentNode));\n    /* Close the pre-walk clone-guard's timing gap: an uponSanitizeElement\n       hook may have been installed after that guard sampled the hook arrays\n       (e.g. lazily from beforeSanitizeElements), leaving ALLOWED_TAGS still\n       aliasing a shared binding that a widening hook would mutate by\n       reference. Fork it before exposing it to the hook. */\n    ALLOWED_TAGS = _forkSharedAllowlist(hooks.uponSanitizeElement, ALLOWED_TAGS, DEFAULT_ALLOWED_TAGS, SET_CONFIG_ALLOWED_TAGS);\n    /* Execute a hook if present */\n    _executeHooks(hooks.uponSanitizeElement, currentNode, {\n      tagName,\n      allowedTags: ALLOWED_TAGS\n    });\n    /* The uponSanitizeElement hook may have detached the node, exactly as\n       above (see _handleHookDetachedNode for the full rationale). */\n    if (_handleHookDetachedNode(currentNode, root)) {\n      return true;\n    }\n    /* Remove mXSS vectors, processing instructions and risky comments */\n    if (_isUnsafeNode(currentNode, tagName)) {\n      _forceRemove(currentNode);\n      return true;\n    }\n    /* Remove element if anything forbids its presence */\n    if (FORBID_TAGS[tagName] || !(EXTRA_ELEMENT_HANDLING.tagCheck instanceof Function && EXTRA_ELEMENT_HANDLING.tagCheck(tagName)) && !ALLOWED_TAGS[tagName]) {\n      const removed = _sanitizeDisallowedNode(currentNode, tagName, root);\n      /* A false return means the node is a custom element kept via\n         CUSTOM_ELEMENT_HANDLING - the only keep path through\n         _sanitizeDisallowedNode. Run afterSanitizeElements on it so the\n         element-hook lifecycle matches normal allowlisted elements: a\n         security policy applied in this hook (e.g. stripping an attribute\n         from every surviving element) must not silently skip kept custom\n         elements (GHSA-c2j3-45gr-mqc4). This mirrors the normal-element\n         tail below - the hook runs, then the walker's subsequent\n         _sanitizeAttributes pass sanitizes the element's attributes. The\n         deliberately skipped namespace and fallback-tag removal checks stay\n         skipped; they are removal decisions, not the hook contract. */\n      if (removed === false) {\n        _executeHooks(hooks.afterSanitizeElements, currentNode, null);\n      }\n      return removed;\n    }\n    /* Check whether element has a valid namespace.\n       Realm-safe check (GHSA-hpcv-96wg-7vj8): use the cached Node.prototype\n       nodeType getter rather than `instanceof Element`, which is realm-\n       bound and short-circuits to false for any node minted in a different\n       realm — letting a foreign-realm element with a forbidden namespace\n       slip past the namespace check entirely. */\n    const nt = _readNodeType(currentNode);\n    if (nt === NODE_TYPE.element && !_checkValidNamespace(currentNode)) {\n      _forceRemove(currentNode);\n      return true;\n    }\n    /* Make sure that older browsers don't get fallback-tag mXSS */\n    if ((tagName === 'noscript' || tagName === 'noembed' || tagName === 'noframes') && regExpTest(FALLBACK_TAG_CLOSE, currentNode.innerHTML)) {\n      _forceRemove(currentNode);\n      return true;\n    }\n    /* Sanitize element content to be template-safe */\n    if (SAFE_FOR_TEMPLATES && currentNode.nodeType === NODE_TYPE.text) {\n      /* Get the element's text content */\n      const content = _stripTemplateExpressions(currentNode.textContent);\n      if (currentNode.textContent !== content) {\n        arrayPush(DOMPurify.removed, {\n          element: currentNode.cloneNode()\n        });\n        currentNode.textContent = content;\n      }\n    }\n    /* Execute a hook if present */\n    _executeHooks(hooks.afterSanitizeElements, currentNode, null);\n    return false;\n  };\n  /**\n   * _isValidAttribute\n   *\n   * @param lcTag Lowercase tag name of containing element.\n   * @param lcName Lowercase attribute name.\n   * @param value Attribute value.\n   * @return Returns true if `value` is valid, otherwise false.\n   */\n  // eslint-disable-next-line complexity\n  const _isValidAttribute = function _isValidAttribute(lcTag, lcName, value) {\n    /* FORBID_ATTR must always win, even if ADD_ATTR predicate would allow it */\n    if (FORBID_ATTR[lcName]) {\n      return false;\n    }\n    /* Reject declarative-partial-updates patch-linkage attributes\n       (https://github.com/WICG/declarative-partial-updates).\n            Empirical note (Chrome 150, verified — see\n       test/declarative-patch-probe-v3.html): expansion is NOT applied after\n       sanitization. For the string path it fires during sanitize()'s own\n       parse, so the walk sees and sanitizes the fully materialized expanded\n       tree — teleports into MathML/SVG integration points included; a\n       weaponized `<template for>`->`<img onerror>` comes back with the handler\n       stripped. For the IN_PLACE path it fires on connection, before the walk.\n       Either way DOMPurify is NOT blind to the patch.\n            This removal is therefore defense-in-depth rather than the sole barrier:\n       it prevents live linkage from surviving into the OUTPUT and re-expanding\n       in the caller's context, and keeps behaviour deterministic if a future\n       engine defers expansion. `for` is legitimate only on <label>/<output>;\n       anywhere else (notably <template for>) it links the element to a patch\n       target and teleports or removes an arbitrary DOM range by id/marker name.\n       `patchsrc` fetches remote markup and is treated as a script-loading\n       mechanism (CSP). Gated on SAFE_FOR_XML so the removal groups with the\n       other structural-threat checks and stays overridable, consistent with\n       the rest of the codebase. PI range markers are already removed by\n       _isUnsafeNode. */\n    if (_isPatchLinkageAttribute(lcName, lcTag)) {\n      return false;\n    }\n    /* Make sure attribute cannot clobber */\n    if (SANITIZE_DOM && (lcName === 'id' || lcName === 'name') && (value in document || value in formElement)) {\n      return false;\n    }\n    const nameIsPermitted = ALLOWED_ATTR[lcName] || EXTRA_ELEMENT_HANDLING.attributeCheck instanceof Function && EXTRA_ELEMENT_HANDLING.attributeCheck(lcName, lcTag);\n    /* Allow valid data-* attributes: At least one character after \"-\"\n        (https://html.spec.whatwg.org/multipage/dom.html#embedding-custom-non-visible-data-with-the-data-*-attributes)\n        XML-compatible (https://html.spec.whatwg.org/multipage/infrastructure.html#xml-compatible and http://www.w3.org/TR/xml/#d0e804)\n        We don't need to check the value; it's always URI safe. */\n    if (ALLOW_DATA_ATTR && regExpTest(DATA_ATTR$1, lcName)) {\n      return true;\n    }\n    /* Allow valid aria-* attributes, the value is always URI safe */\n    if (ALLOW_ARIA_ATTR && regExpTest(ARIA_ATTR$1, lcName)) {\n      return true;\n    }\n    /* A name outside the allowlist is acceptable on custom-element terms\n       only. The value checks below are intentionally skipped in that case:\n       if the user supplied a tagNameCheck we also allow derived custom\n       elements using the same test, and attributes passing the configured\n       attributeNameCheck are allowed as custom elements define these at\n       their own discretion. */\n    if (!nameIsPermitted) {\n      return (\n        // Condition a) covers a basically valid custom element tag name whose\n        // tag passes the configured tagNameCheck and whose attribute name\n        // passes the configured attributeNameCheck ...\n        _isBasicCustomElement(lcTag) && _matchesNameCheck(CUSTOM_ELEMENT_HANDLING.tagNameCheck, lcTag) && _matchesNameCheck(CUSTOM_ELEMENT_HANDLING.attributeNameCheck, lcName, lcTag) ||\n        // Condition b) covers an `is` attribute whose value passes the\n        // configured tagNameCheck while customized built-in elements are\n        // allowed.\n        lcName === 'is' && CUSTOM_ELEMENT_HANDLING.allowCustomizedBuiltInElements && _matchesNameCheck(CUSTOM_ELEMENT_HANDLING.tagNameCheck, value)\n      );\n    }\n    /* Check value is safe. First, is attr inert? If so, is safe */\n    if (URI_SAFE_ATTRIBUTES[lcName]) {\n      return true;\n    }\n    /* Check no script, data or unknown possibly unsafe URI\n        unless we know URI values are safe for that attribute */\n    if (regExpTest(IS_ALLOWED_URI$1, stringReplace(value, ATTR_WHITESPACE$1, ''))) {\n      return true;\n    }\n    /* Keep image data URIs alive if src/xlink:href is allowed */\n    /* Further prevent gadget XSS for dynamically built script tags */\n    if ((lcName === 'src' || lcName === 'xlink:href' || lcName === 'href') && lcTag !== 'script' && stringIndexOf(value, 'data:') === 0 && DATA_URI_TAGS[lcTag]) {\n      return true;\n    }\n    /* Allow unknown protocols: This provides support for links that\n        are handled by protocol handlers which may be unknown ahead of\n        time, e.g. fb:, spotify: */\n    if (ALLOW_UNKNOWN_PROTOCOLS && !regExpTest(IS_SCRIPT_OR_DATA$1, stringReplace(value, ATTR_WHITESPACE$1, ''))) {\n      return true;\n    }\n    /* Only an empty (binary) value remains safe at this point;\n       anything else is presumed unsafe, do not add it back */\n    return !value;\n  };\n  /* Names the HTML spec reserves from valid-custom-element-name; these must\n   * never be treated as basic custom elements even when a permissive\n   * CUSTOM_ELEMENT_HANDLING.tagNameCheck is configured. */\n  const RESERVED_CUSTOM_ELEMENT_NAMES = addToSet({}, ['annotation-xml', 'color-profile', 'font-face', 'font-face-format', 'font-face-name', 'font-face-src', 'font-face-uri', 'missing-glyph']);\n  /**\n   * _isBasicCustomElement\n   * checks if at least one dash is included in tagName, and it's not the first char\n   * for more sophisticated checking see https://github.com/sindresorhus/validate-element-name\n   *\n   * @param tagName name of the tag of the node to sanitize\n   * @returns Returns true if the tag name meets the basic criteria for a custom element, otherwise false.\n   */\n  const _isBasicCustomElement = function _isBasicCustomElement(tagName) {\n    return !RESERVED_CUSTOM_ELEMENT_NAMES[stringToLowerCase(tagName)] && regExpTest(CUSTOM_ELEMENT$1, tagName);\n  };\n  /**\n   * Wrap an attribute value in the matching Trusted Types object when\n   * the active policy requires it. Namespaced attributes pass through\n   * unchanged (no TT support yet, see\n   * https://bugs.chromium.org/p/chromium/issues/detail?id=1305293).\n   *\n   * @param lcTag lowercase tag name of the containing element\n   * @param lcName lowercase attribute name\n   * @param namespaceURI the attribute's namespace, if any\n   * @param value the attribute value to wrap\n   * @return the value, wrapped when Trusted Types demand it\n   */\n  const _applyTrustedTypesToAttribute = function _applyTrustedTypesToAttribute(lcTag, lcName, namespaceURI, value) {\n    if (trustedTypesPolicy && typeof trustedTypes === 'object' && typeof trustedTypes.getAttributeType === 'function' && !namespaceURI) {\n      switch (trustedTypes.getAttributeType(lcTag, lcName)) {\n        case 'TrustedHTML':\n          {\n            return _createTrustedHTML(value);\n          }\n        case 'TrustedScriptURL':\n          {\n            return _createTrustedScriptURL(value);\n          }\n      }\n    }\n    return value;\n  };\n  /**\n   * Write a modified attribute value back onto the element. On\n   * success, re-probe for clobbering introduced by the new value and\n   * remove the element when found; otherwise, when this writeback is the\n   * recreate half of the SANITIZE_NAMED_PROPS remove-and-recreate, pop the\n   * removal entry that path recorded so it does not show as removed. On\n   * failure, remove the attribute instead.\n   *\n   * Returns true only on a clean write (the value was set and the new value\n   * introduced no clobbering). The caller uses that, together with its own\n   * knowledge of whether this attribute pushed a DOMPurify.removed record, to\n   * decide whether to pop that record. The pop must happen ONLY for the\n   * named-prop remove-and-recreate; popping on any other value change (trim,\n   * template scrubbing, Trusted Types) would consume an unrelated _forceRemove\n   * subtree-cleanup record and let that detached subtree keep a live event\n   * handler through the IN_PLACE neutralization pass (SO-001).\n   *\n   * @param currentNode the element carrying the attribute\n   * @param name the attribute name as present on the element\n   * @param namespaceURI the attribute's namespace, if any\n   * @param value the new attribute value\n   * @return true if the value was written without introducing clobbering\n   */\n  const _setAttributeValue = function _setAttributeValue(currentNode, name, namespaceURI, value) {\n    try {\n      if (namespaceURI) {\n        currentNode.setAttributeNS(namespaceURI, name, value);\n      } else {\n        /* Fallback to setAttribute() for browser-unrecognized namespaces e.g. \"x-schema\". */\n        currentNode.setAttribute(name, value);\n      }\n      if (_isClobbered(currentNode)) {\n        _forceRemove(currentNode);\n        return false;\n      }\n      return true;\n    } catch (_) {\n      _removeAttribute(name, currentNode);\n      return false;\n    }\n  };\n  /**\n   * _sanitizeAttributes\n   *\n   * @protect attributes\n   * @protect nodeName\n   * @protect removeAttribute\n   * @protect setAttribute\n   *\n   * @param currentNode to sanitize\n   */\n  // eslint-disable-next-line complexity\n  const _sanitizeAttributes = function _sanitizeAttributes(currentNode) {\n    /* Execute a hook if present */\n    _executeHooks(hooks.beforeSanitizeAttributes, currentNode, null);\n    const attributes = currentNode.attributes;\n    /* Check if we have attributes; if not we might have a text node */\n    if (!attributes || _isClobbered(currentNode)) {\n      return;\n    }\n    /* Same lazy-install guard as uponSanitizeElement (see there): fork the\n       attribute allowlist off its shared binding before a hook can see it. */\n    ALLOWED_ATTR = _forkSharedAllowlist(hooks.uponSanitizeAttribute, ALLOWED_ATTR, DEFAULT_ALLOWED_ATTR, SET_CONFIG_ALLOWED_ATTR);\n    const hookEvent = {\n      attrName: '',\n      attrValue: '',\n      keepAttr: true,\n      allowedAttributes: ALLOWED_ATTR,\n      forceKeepAttr: undefined\n    };\n    let l = attributes.length;\n    const lcTag = transformCaseFunc(currentNode.nodeName);\n    /* Go backwards over all attributes; safely remove bad ones */\n    while (l--) {\n      const attr = attributes[l];\n      const name = attr.name,\n        namespaceURI = attr.namespaceURI,\n        attrValue = attr.value;\n      const lcName = transformCaseFunc(name);\n      const initValue = attrValue;\n      let value = name === 'value' ? initValue : stringTrim(initValue);\n      /* Tracks whether this specific attribute pushed a DOMPurify.removed\n         record that a later _setAttributeValue() writeback is expected to pop\n         back off (the SANITIZE_NAMED_PROPS remove-and-recreate below is the\n         only path that does). A value that merely changed via trim, template\n         scrubbing, or Trusted Types pushes no such record, so its writeback\n         must NOT pop — otherwise it consumes an unrelated _forceRemove subtree\n         record and that detached subtree escapes the IN_PLACE handler-\n         neutralization pass (SO-001). */\n      let recreatedNamedProp = false;\n      /* Execute a hook if present */\n      hookEvent.attrName = lcName;\n      hookEvent.attrValue = value;\n      hookEvent.keepAttr = true;\n      hookEvent.forceKeepAttr = undefined; // Allows developers to see this is a property they can set\n      _executeHooks(hooks.uponSanitizeAttribute, currentNode, hookEvent);\n      value = hookEvent.attrValue;\n      /* Full DOM Clobbering protection via namespace isolation,\n       * Prefix id and name attributes with `user-content-`\n       */\n      if (SANITIZE_NAMED_PROPS && (lcName === 'id' || lcName === 'name') && stringIndexOf(value, SANITIZE_NAMED_PROPS_PREFIX) !== 0) {\n        // Remove the attribute with this value\n        _removeAttribute(name, currentNode, attr);\n        // Prefix the value and later re-create the attribute with the sanitized value\n        value = SANITIZE_NAMED_PROPS_PREFIX + value;\n        // This attribute owns the record just pushed; its recreate writeback\n        // is the one allowed to pop it back off.\n        recreatedNamedProp = true;\n      }\n      // Else: already prefixed, leave the attribute alone — the prefix is\n      // itself the clobbering protection, and re-applying it is incorrect.\n      /* Work around a security issue with comments inside attributes */\n      if (SAFE_FOR_XML && regExpTest(/((--!?|])>)|<\\/(style|script|title|xmp|textarea|noscript|iframe|noembed|noframes)/i, value)) {\n        _removeAttribute(name, currentNode, attr);\n        continue;\n      }\n      /* Make sure we cannot easily use animated hrefs, even if animations are allowed */\n      if (lcName === 'attributename' && stringMatch(value, 'href')) {\n        _removeAttribute(name, currentNode, attr);\n        continue;\n      }\n      /* Did the hooks force-keep the attribute? */\n      if (hookEvent.forceKeepAttr) {\n        continue;\n      }\n      /* Did the hooks approve of the attribute? */\n      if (!hookEvent.keepAttr) {\n        _removeAttribute(name, currentNode, attr);\n        continue;\n      }\n      /* Work around a security issue in jQuery 3.0 */\n      if (!ALLOW_SELF_CLOSE_IN_ATTR && regExpTest(SELF_CLOSING_TAG, value)) {\n        _removeAttribute(name, currentNode, attr);\n        continue;\n      }\n      /* Sanitize attribute content to be template-safe */\n      if (SAFE_FOR_TEMPLATES) {\n        value = _stripTemplateExpressions(value);\n      }\n      /* Is `value` valid for this attribute? */\n      if (!_isValidAttribute(lcTag, lcName, value)) {\n        _removeAttribute(name, currentNode, attr);\n        continue;\n      }\n      /* Handle attributes that require Trusted Types */\n      value = _applyTrustedTypesToAttribute(lcTag, lcName, namespaceURI, value);\n      /* Handle invalid data-* attribute set by try-catching it */\n      if (value !== initValue) {\n        const cleanWrite = _setAttributeValue(currentNode, name, namespaceURI, value);\n        /* Only the named-prop remove-and-recreate owns a DOMPurify.removed\n           record to pop; a plain trim/template/Trusted-Types writeback owns\n           none, so popping here would drop an unrelated subtree's cleanup\n           record (SO-001). */\n        if (cleanWrite && recreatedNamedProp) {\n          arrayPop(DOMPurify.removed);\n        }\n      }\n    }\n    /* Execute a hook if present */\n    _executeHooks(hooks.afterSanitizeAttributes, currentNode, null);\n  };\n  /**\n   * _sanitizeShadowDOM\n   *\n   * @param fragment to iterate over recursively\n   */\n  const _sanitizeShadowDOM2 = function _sanitizeShadowDOM(fragment) {\n    let shadowNode = null;\n    const shadowIterator = _createNodeIterator(fragment);\n    /* Execute a hook if present */\n    _executeHooks(hooks.beforeSanitizeShadowDOM, fragment, null);\n    while (shadowNode = shadowIterator.nextNode()) {\n      /* Execute a hook if present */\n      _executeHooks(hooks.uponSanitizeShadowNode, shadowNode, null);\n      /* Sanitize tags and elements */\n      _sanitizeElements(shadowNode, fragment);\n      /* Check attributes next */\n      _sanitizeAttributes(shadowNode);\n      /* Deep shadow DOM detected.\n         Realm-safe check (GHSA-hpcv-96wg-7vj8): use nodeType against the\n         DOCUMENT_FRAGMENT_NODE constant rather than instanceof, so we\n         recurse into <template>.content from foreign realms too. */\n      if (_isDocumentFragment(shadowNode.content)) {\n        _sanitizeShadowDOM2(shadowNode.content);\n      }\n      /* An element iterated here may itself host an attached\n         shadow root. The default NodeIterator does not enter shadow\n         trees, so a shadow root nested inside template.content was\n         previously reached by no walk at all (the pre-pass at\n         _sanitizeAttachedShadowRoots descends via childNodes, which\n         doesn't enter template.content; the template-content recursion\n         above iterates the content but never inspected shadowRoot).\n         Walk it explicitly. The nodeType guard avoids reading\n         shadowRoot off text / comment / CDATA / PI nodes that the\n         iterator also surfaces. */\n      if (_readNodeType(shadowNode) === NODE_TYPE.element) {\n        const innerSr = getShadowRoot(shadowNode);\n        if (_isDocumentFragment(innerSr)) {\n          _sanitizeAttachedShadowRoots(innerSr);\n          _sanitizeShadowDOM2(innerSr);\n        }\n      }\n    }\n    /* Execute a hook if present */\n    _executeHooks(hooks.afterSanitizeShadowDOM, fragment, null);\n  };\n  /**\n   * _sanitizeAttachedShadowRoots\n   *\n   * Walks `root` and feeds every attached shadow root we encounter into\n   * the existing _sanitizeShadowDOM pipeline. The default node iterator\n   * does not descend into shadow trees, so nodes inside an attached\n   * shadow root would otherwise be skipped entirely.\n   *\n   * Two real input paths put attached shadow roots in front of us:\n   *   1. IN_PLACE on a DOM node that already has shadow roots attached.\n   *   2. DOM-node input where importNode(dirty, true) deep-clones the\n   *      shadow root because it was created with `clonable: true`.\n   *\n   * This pass runs once, up front, so the main iteration loop (and the\n   * existing _sanitizeShadowDOM template-content recursion) stay\n   * untouched — string-input paths are not affected.\n   *\n   * @param root the subtree root to walk for attached shadow roots\n   */\n  const _sanitizeAttachedShadowRoots = function _sanitizeAttachedShadowRoots(root) {\n    /* Iterative (explicit stack) rather than per-child recursion. DOM APIs\n       impose no depth cap, so an attacker-shaped tree (JSON/CRDT/editor data\n       built straight into the DOM — the IN_PLACE surface) deeper than the JS\n       call-stack budget would otherwise overflow native recursion here and\n       throw at the IN_PLACE entry pre-pass, before a single node is\n       sanitized, leaving the caller's live tree untouched (fail-open). See\n       campaign-3 F4. A heap stack keeps depth off the call stack.\n            Each work item is either a node to descend into, or a deferred\n       `_sanitizeShadowDOM` for an already-walked shadow root. The deferred\n       form preserves the original post-order discipline: a shadow root's\n       nested shadow roots are discovered before the outer shadow is\n       sanitized (which may remove hosts). Pushes are in reverse of the\n       desired processing order (LIFO): template content, then children, then\n       the shadow-sanitize, then the shadow walk — so the order matches the\n       previous recursion exactly. */\n    const stack = [{\n      node: root,\n      shadow: null\n    }];\n    while (stack.length > 0) {\n      const item = stack.pop();\n      /* Deferred shadow-DOM sanitisation: runs after its subtree was walked. */\n      if (item.shadow) {\n        _sanitizeShadowDOM2(item.shadow);\n        continue;\n      }\n      const node = item.node;\n      const nodeType = _readNodeType(node);\n      const isElement = nodeType === NODE_TYPE.element;\n      /* (pushed last → processed first) Children, snapshotted in reverse so\n         the first child is processed first. Snapshotting matters because a\n         hook may detach siblings mid-walk. */\n      const childNodes = getChildNodes(node);\n      if (childNodes) {\n        for (let i = childNodes.length - 1; i >= 0; --i) {\n          stack.push({\n            node: childNodes[i],\n            shadow: null\n          });\n        }\n      }\n      /* (pushed before children → processed after them, matching the old\n         \"template content last\" order) When the node is a <template>,\n         descend into its content. */\n      if (isElement) {\n        const rootName = getNodeName ? getNodeName(node) : null;\n        if (typeof rootName === 'string' && transformCaseFunc(rootName) === 'template') {\n          const content = node.content;\n          if (_isDocumentFragment(content)) {\n            stack.push({\n              node: content,\n              shadow: null\n            });\n          }\n        }\n      }\n      /* Shadow root (processed first): walk its subtree, then sanitise it.\n         Realm-safe check (GHSA-hpcv-96wg-7vj8): nodeType-based detection\n         rather than `instanceof DocumentFragment`, which is realm-bound and\n         silently skipped foreign-realm shadow roots (e.g.\n         iframe.contentDocument attachShadow). */\n      if (isElement) {\n        const sr = getShadowRoot(node);\n        if (_isDocumentFragment(sr)) {\n          /* Push the deferred sanitise first so it pops after the shadow\n             walk we push next, i.e. nested shadow roots are discovered\n             before this one is sanitised. */\n          stack.push({\n            node: null,\n            shadow: sr\n          }, {\n            node: sr,\n            shadow: null\n          });\n        }\n      }\n    }\n  };\n  // eslint-disable-next-line complexity\n  DOMPurify.sanitize = function (dirty) {\n    let cfg = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {};\n    let body = null;\n    let importedNode = null;\n    let currentNode = null;\n    let returnNode = null;\n    /* Make sure we have a string to sanitize.\n      DO NOT return early, as this will return the wrong type if\n      the user has requested a DOM object rather than a string */\n    IS_EMPTY_INPUT = !dirty;\n    if (IS_EMPTY_INPUT) {\n      dirty = '<!-->';\n    }\n    /* Stringify, in case dirty is an object */\n    if (typeof dirty !== 'string' && !_isNode(dirty)) {\n      dirty = stringifyValue(dirty);\n      if (typeof dirty !== 'string') {\n        throw typeErrorCreate('dirty is not a string, aborting');\n      }\n    }\n    /* Return dirty HTML if DOMPurify cannot run */\n    if (!DOMPurify.isSupported) {\n      return dirty;\n    }\n    /* Assign config vars */\n    if (SET_CONFIG) {\n      /* Persistent setConfig() path: _parseConfig is skipped, so the sets are\n       * not re-derived per call. Restore them from the pristine bindings\n       * captured at setConfig() time so a previous call's hook clone (mutated\n       * below) does not carry over. */\n      ALLOWED_TAGS = SET_CONFIG_ALLOWED_TAGS;\n      ALLOWED_ATTR = SET_CONFIG_ALLOWED_ATTR;\n    } else {\n      _parseConfig(cfg);\n    }\n    /* Clone the hook-mutable allowlists before the walk whenever an\n     * uponSanitize* hook is registered. The hook event exposes ALLOWED_TAGS\n     * and ALLOWED_ATTR by reference (as allowedTags / allowedAttributes), so\n     * a hook that widens them would otherwise mutate the shared set\n     * permanently: across later calls and across every element. Cloning per\n     * walk keeps documented in-call widening working while scoping it to the\n     * call. A single guard for both config paths - the per-call path rebinds\n     * the sets in _parseConfig each call, the persistent path restores them\n     * from the captured bindings just above - so the two cannot diverge. */\n    if (hooks.uponSanitizeElement.length > 0 || hooks.uponSanitizeAttribute.length > 0) {\n      ALLOWED_TAGS = clone(ALLOWED_TAGS);\n    }\n    if (hooks.uponSanitizeAttribute.length > 0) {\n      ALLOWED_ATTR = clone(ALLOWED_ATTR);\n    }\n    /* Clean up removed elements */\n    DOMPurify.removed = [];\n    /* Resolve IN_PLACE for this call without mutating persistent config.\n       Writing the IN_PLACE closure variable here leaks under setConfig(),\n       where _parseConfig is skipped on later calls: a single string call would\n       disable in-place mode for every subsequent node call, returning a\n       sanitized copy while leaving the caller's node — which in-place callers\n       keep using and whose return value they ignore — unsanitized. REPORT-2. */\n    const inPlace = IN_PLACE && typeof dirty !== 'string' && _isNode(dirty);\n    if (inPlace) {\n      /* Declarative-partial-updates / streaming pre-pass: sever every patch\n         linkage across the live tree BEFORE the walk, so no patch can fire\n         mid-walk and inject into an already-processed region. Runs first, so\n         it also covers the forbidden/clobbered roots that throw below. */\n      _neutralizePatchLinkage(dirty);\n      /* Do some early pre-sanitization to avoid unsafe root nodes.\n         Read nodeName through the cached prototype getter — a clobbering\n         child named \"nodeName\" on the form root would otherwise shadow\n         the property and let this check skip the root-allowlist\n         validation entirely. */\n      const nn = _readNodeName(dirty);\n      if (typeof nn === 'string') {\n        const tagName = transformCaseFunc(nn);\n        if (!ALLOWED_TAGS[tagName] || FORBID_TAGS[tagName]) {\n          /* Fail closed on a live root: neutralize handlers/children before\n             throwing, exactly as the mid-walk abort path does. */\n          _neutralizeRoot(dirty);\n          throw typeErrorCreate('root node is forbidden and cannot be sanitized in-place');\n        }\n      }\n      /* Pre-flight the root through _isClobbered. The iterator-driven\n         removal path can not detach a parent-less root: _forceRemove\n         falls through to Element.prototype.remove(), which per spec\n         is a no-op on a node with no parent. A clobbered root would\n         then survive the main loop with its attributes uninspected,\n         because _sanitizeAttributes early-returns on _isClobbered. The\n         result would be an attacker-controlled form, complete with any\n         event-handler attributes the caller passed in, handed back to\n         the application unsanitized. Refuse to sanitize such a root\n         the same way we refuse a forbidden tag. GHSA-r47g-fvhr-h676. */\n      if (_isClobbered(dirty)) {\n        /* Fail closed on a live clobbered root before throwing.\n           _neutralizeRoot's reads are clobber-safe (cached getters); the\n           form's non-clobbered descendants, e.g. an armed <img>, are scrubbed. */\n        _neutralizeRoot(dirty);\n        throw typeErrorCreate('root node is clobbered and cannot be sanitized in-place');\n      }\n      /* Sanitize attached shadow roots before the main iterator runs.\n         The iterator does not descend into shadow trees. Same fail-closed\n         barrier as the main walk (campaign-3 F2): a custom-element reaction\n         inside a shadow root could abort this pre-pass before the walk runs,\n         which would otherwise leave the entire live tree unsanitized. */\n      try {\n        _sanitizeAttachedShadowRoots(dirty);\n      } catch (error) {\n        _neutralizeRoot(dirty);\n        throw error;\n      }\n    } else if (_isNode(dirty)) {\n      /* If dirty is a DOM element, append to an empty document to avoid\n         elements being stripped by the parser */\n      body = _initDocument('<!---->');\n      importedNode = body.ownerDocument.importNode(dirty, true);\n      if (importedNode.nodeType === NODE_TYPE.element && importedNode.nodeName === 'BODY') {\n        /* Node is already a body, use as is */\n        body = importedNode;\n      } else if (importedNode.nodeName === 'HTML') {\n        body = importedNode;\n      } else {\n        // eslint-disable-next-line unicorn/prefer-dom-node-append\n        body.appendChild(importedNode);\n      }\n      /* Clonable shadow roots are deep-cloned by importNode(); sanitize\n         them before the main iterator runs, since the iterator does not\n         descend into shadow trees. The walk routes every read through a\n         cached prototype getter so clobbering descendants on a form root\n         cannot hide a shadow host from this pass.\n                Traverse from `body`, not `importedNode`: when importedNode is a\n         DocumentFragment, the appendChild() above moves its children into\n         `body` and leaves the fragment empty, so walking importedNode would\n         scan nothing and miss every attached shadow host now under `body`\n         (SO-003). In the BODY/HTML branches `body === importedNode`, so this\n         is equivalent there; in the element branch `body` contains the\n         appended element and its descendants. `body` covers all three. */\n      _sanitizeAttachedShadowRoots(body);\n    } else {\n      /* Exit directly if we have nothing to do */\n      if (!RETURN_DOM && !SAFE_FOR_TEMPLATES && !WHOLE_DOCUMENT &&\n      // eslint-disable-next-line unicorn/prefer-includes\n      dirty.indexOf('<') === -1) {\n        return trustedTypesPolicy && RETURN_TRUSTED_TYPE ? _createTrustedHTML(dirty) : dirty;\n      }\n      /* Initialize the document to work on */\n      body = _initDocument(dirty);\n      /* Check we have a DOM node from the data */\n      if (!body) {\n        return RETURN_DOM ? null : RETURN_TRUSTED_TYPE ? emptyHTML : '';\n      }\n    }\n    /* Remove first element node (ours) if FORCE_BODY is set */\n    if (body && FORCE_BODY) {\n      _forceRemove(body.firstChild);\n    }\n    /* Get node iterator */\n    const walkRoot = inPlace ? dirty : body;\n    /* Now start iterating over the created document.\n       The walk runs inside an exception barrier (campaign-3 F2): a re-entrant\n       engine/custom-element mutation can detach a node mid-walk so\n       `_forceRemove`'s parentless guard throws, aborting the loop. Without the\n       barrier the caller's in-place tree would be left half-sanitized with the\n       unvisited tail still armed. _createNodeIterator itself is inside the\n       barrier too: constructing the iterator dereferences the root's document,\n       and any failure there (e.g. an exotic/clobbered root) must still fail\n       closed rather than skip the neutralize. On any throw we fail closed -\n       strip the in-place root bare - then rethrow so the existing throw\n       contract is preserved. (String/DOM-copy paths never return the partial\n       body, so the propagating throw is already fail-closed there.) */\n    try {\n      const nodeIterator = _createNodeIterator(walkRoot);\n      while (currentNode = nodeIterator.nextNode()) {\n        /* Sanitize tags and elements */\n        _sanitizeElements(currentNode, walkRoot);\n        /* Check attributes next */\n        _sanitizeAttributes(currentNode);\n        /* Shadow DOM detected, sanitize it.\n           Realm-safe check (GHSA-hpcv-96wg-7vj8): nodeType-based detection\n           instead of instanceof, so foreign-realm <template>.content is\n           walked correctly. */\n        if (_isDocumentFragment(currentNode.content)) {\n          _sanitizeShadowDOM2(currentNode.content);\n        }\n      }\n    } catch (error) {\n      if (inPlace) {\n        _neutralizeRoot(dirty);\n        /* Nodes _forceRemove'd earlier in the aborted walk are already\n           detached from the root, so _neutralizeRoot's subtree pass does not\n           reach them. Defuse them too, mirroring the success-path loop below. */\n        arrayForEach(DOMPurify.removed, entry => {\n          if (entry.element) {\n            _neutralizeSubtree(entry.element);\n          }\n        });\n      }\n      throw error;\n    }\n    /* If we sanitized `dirty` in-place, return it. */\n    if (inPlace) {\n      /* Fail-closed completion of the audit-5 F1 fix: every node removed from\n         the caller's live tree is detached but may still hold a queued\n         resource-event handler that fires in page scope after we return. The\n         move-hoist covers only disallowed-tag KEEP_CONTENT removals; strip the\n         non-allow-listed attributes off every other removed subtree (clobber,\n         mXSS, namespace, comments, KEEP_CONTENT:false, …) so those handlers are\n         cancelled before any event can fire. Runs synchronously, pre-return. */\n      arrayForEach(DOMPurify.removed, entry => {\n        if (entry.element) {\n          _neutralizeSubtree(entry.element);\n        }\n      });\n      if (SAFE_FOR_TEMPLATES) {\n        _scrubTemplateExpressions2(dirty);\n      }\n      return dirty;\n    }\n    /* Return sanitized string or DOM */\n    if (RETURN_DOM) {\n      if (SAFE_FOR_TEMPLATES) {\n        _scrubTemplateExpressions2(body);\n      }\n      if (RETURN_DOM_FRAGMENT) {\n        returnNode = createDocumentFragment.call(body.ownerDocument);\n        while (body.firstChild) {\n          // eslint-disable-next-line unicorn/prefer-dom-node-append\n          returnNode.appendChild(body.firstChild);\n        }\n      } else {\n        returnNode = body;\n      }\n      if (ALLOWED_ATTR.shadowroot || ALLOWED_ATTR.shadowrootmode) {\n        /*\n          AdoptNode() is not used because internal state is not reset\n          (e.g. the past names map of a HTMLFormElement), this is safe\n          in theory but we would rather not risk another attack vector.\n          The state that is cloned by importNode() is explicitly defined\n          by the specs.\n        */\n        returnNode = importNode.call(originalDocument, returnNode, true);\n      }\n      return returnNode;\n    }\n    let serializedHTML = WHOLE_DOCUMENT ? body.outerHTML : body.innerHTML;\n    /* Serialize doctype if allowed */\n    if (WHOLE_DOCUMENT && ALLOWED_TAGS['!doctype'] && body.ownerDocument && body.ownerDocument.doctype && body.ownerDocument.doctype.name && regExpTest(DOCTYPE_NAME, body.ownerDocument.doctype.name)) {\n      serializedHTML = '<!DOCTYPE ' + body.ownerDocument.doctype.name + '>\\n' + serializedHTML;\n    }\n    /* Sanitize final string template-safe */\n    if (SAFE_FOR_TEMPLATES) {\n      serializedHTML = _stripTemplateExpressions(serializedHTML);\n    }\n    return trustedTypesPolicy && RETURN_TRUSTED_TYPE ? _createTrustedHTML(serializedHTML) : serializedHTML;\n  };\n  DOMPurify.setConfig = function () {\n    let cfg = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : {};\n    _parseConfig(cfg);\n    SET_CONFIG = true;\n    SET_CONFIG_ALLOWED_TAGS = ALLOWED_TAGS;\n    SET_CONFIG_ALLOWED_ATTR = ALLOWED_ATTR;\n  };\n  DOMPurify.clearConfig = function () {\n    CONFIG = null;\n    SET_CONFIG = false;\n    SET_CONFIG_ALLOWED_TAGS = null;\n    SET_CONFIG_ALLOWED_ATTR = null;\n    // Drop any caller-supplied Trusted Types policy so it cannot poison later\n    // `RETURN_TRUSTED_TYPE` output. The internal default policy (cached, and\n    // never recreated — Trusted Types throws on duplicate names) is restored by\n    // the next `_parseConfig`. See GHSA-vxr8-fq34-vvx9.\n    trustedTypesPolicy = defaultTrustedTypesPolicy;\n    emptyHTML = '';\n  };\n  DOMPurify.isValidAttribute = function (tag, attr, value) {\n    /* Initialize shared config vars if necessary. */\n    if (!CONFIG) {\n      _parseConfig({});\n    }\n    const lcTag = transformCaseFunc(tag);\n    const lcName = transformCaseFunc(attr);\n    return _isValidAttribute(lcTag, lcName, value);\n  };\n  DOMPurify.addHook = function (entryPoint, hookFunction) {\n    if (typeof hookFunction !== 'function') {\n      return;\n    }\n    /* Reject unknown entry points. Without this, a non-hook key (e.g.\n     * '__proto__') indexes off the prototype chain rather than a real\n     * hook array, and arrayPush then writes to Object.prototype. Guard\n     * with an own-property check against the known hook names. */\n    if (!objectHasOwnProperty(hooks, entryPoint)) {\n      return;\n    }\n    arrayPush(hooks[entryPoint], hookFunction);\n  };\n  DOMPurify.removeHook = function (entryPoint, hookFunction) {\n    if (!objectHasOwnProperty(hooks, entryPoint)) {\n      return undefined;\n    }\n    if (hookFunction !== undefined) {\n      const index = arrayLastIndexOf(hooks[entryPoint], hookFunction);\n      return index === -1 ? undefined : arraySplice(hooks[entryPoint], index, 1)[0];\n    }\n    return arrayPop(hooks[entryPoint]);\n  };\n  DOMPurify.removeHooks = function (entryPoint) {\n    if (!objectHasOwnProperty(hooks, entryPoint)) {\n      return;\n    }\n    hooks[entryPoint] = [];\n  };\n  DOMPurify.removeAllHooks = function () {\n    hooks = _createHooksMap();\n  };\n  return DOMPurify;\n}\nvar purify = createDOMPurify();\n\nexport { purify as default };\n//# sourceMappingURL=purify.es.mjs.map\n","/**\n * SPDX-License-Identifier: AGPL-3.0-or-later\n * Copyright (c) 2026 Jacob Bühler\n */\nimport DOMPurify from 'dompurify'\n\n/**\n * Client-side defense-in-depth for pad HTML.\n *\n * The HTML is sanitized server-side already, but it comes from a pad\n * server this app does not own and the viewer injects it via `innerHTML`,\n * so the same allowlist is enforced again here — a regression in the\n * server gate then cannot become XSS.\n *\n * Mirrors `SnapshotHtmlSanitizer::ALLOWED_TAGS` and its link rule.\n */\nconst ALLOWED_TAGS = [\n\t'p', 'br',\n\t'ul', 'ol', 'li',\n\t'h1', 'h2', 'h3', 'h4', 'h5', 'h6',\n\t'strong', 'b', 'em', 'i', 'u', 's', 'del',\n\t'blockquote', 'pre', 'code',\n\t'a',\n]\n\n/** Mirrors `SnapshotHtmlSanitizer::ALLOWED_LINK_SCHEMES`. */\nconst ALLOWED_URI_REGEXP = /^(?:https?|mailto):/i\n\n/**\n * Set here rather than trusted from the server pass: a link arriving\n * without them still cannot hand the opened tab a reference back.\n */\nDOMPurify.addHook('afterSanitizeAttributes', (node) => {\n\tif (node.tagName !== 'A') {\n\t\treturn\n\t}\n\tif (!node.hasAttribute('href')) {\n\t\t// The href was refused, so this is no longer a link. The server\n\t\t// stage unwraps it to plain text; leaving an empty `<a>` shell here\n\t\t// would be the two stages disagreeing about the same input.\n\t\tnode.replaceWith(...node.childNodes)\n\t\treturn\n\t}\n\tnode.setAttribute('target', '_blank')\n\tnode.setAttribute('rel', 'noopener noreferrer')\n})\n\n/**\n * @param {unknown} html\n * @return {string} sanitized HTML safe to assign to innerHTML\n */\nexport function sanitizeSnapshotHtml(html) {\n\treturn DOMPurify.sanitize(String(html ?? ''), {\n\t\tALLOWED_TAGS,\n\t\t// `href` only. `target` and `rel` are deliberately absent: DOMPurify\n\t\t// matches their values against ALLOWED_URI_REGEXP and would strip\n\t\t// them anyway, so listing them would read as though the server's\n\t\t// values pass through. The hook above sets them instead.\n\t\tALLOWED_ATTR: ['href'],\n\t\tALLOWED_URI_REGEXP,\n\t\tALLOW_DATA_ATTR: false,\n\t})\n}\n","/**\n * SPDX-License-Identifier: AGPL-3.0-or-later\n * Copyright (c) 2026 Jacob Bühler\n */\nimport { fetchJsonWithTimeout } from './fetch-helpers.js'\nimport { sanitizeSnapshotHtml } from './sanitize-html.js'\n\n/** Longer than the server's own 20s budget, so we cannot time out first. */\nconst CONTENT_TIMEOUT_MS = 25000\n\n/**\n * Loads the current pad content for a read-only view.\n *\n * @param {string} contentUrl endpoint from the open response\n * @param {{signal?: AbortSignal}} options\n * @return {Promise<{html: string, isEmpty: boolean}>}\n */\nexport const loadPadContent = async (contentUrl, { signal } = {}) => {\n\tconst data = await fetchJsonWithTimeout(\n\t\tcontentUrl,\n\t\t{ method: 'GET', signal },\n\t\t{ timeoutMs: CONTENT_TIMEOUT_MS, fallbackMessage: 'Could not load the pad content.' },\n\t)\n\n\t// The failure this catches looks exactly like success: a login page or\n\t// a maintenance notice answered with HTTP 200 carries no `html`, and a\n\t// missing field read as `''` would be shown as an empty pad.\n\tif (!data || typeof data !== 'object' || typeof data.html !== 'string' || typeof data.is_empty !== 'boolean') {\n\t\tthrow new Error('Could not load the pad content.')\n\t}\n\n\tconst html = sanitizeSnapshotHtml(data.html)\n\n\treturn {\n\t\thtml,\n\t\t// The server's verdict — Etherpad answers an untouched pad with\n\t\t// markup, so the string alone cannot say — plus the case it cannot\n\t\t// see, a sanitizer that empties what it was given.\n\t\tisEmpty: data.is_empty || html.trim() === '',\n\t}\n}\n","/**\n * SPDX-License-Identifier: AGPL-3.0-or-later\n * Copyright (c) 2026 Jacob Bühler\n */\nimport { isUnanswered } from './fetch-helpers.js'\n\n/**\n * A floor, and the largest delay `setInterval` can hold - a signed 32-bit\n * one, past which it wraps and fires almost at once. The upper bound is\n * the timer's limit, not an opinion on how often to sync: capping a long\n * interval would make the client call home more often than it was asked\n * to.\n */\nconst MIN_INTERVAL_MS = 5000\nconst MAX_TIMER_MS = 2147483647\nconst DEFAULT_INTERVAL_MS = 120000\n\n/**\n * The code, not the message: the wording is translated and reworded.\n *\n * @param {unknown} error\n * @return {boolean}\n */\nexport const isMissingFrontmatterError = (error) => Boolean(error) && error.code === 'missing_frontmatter'\n\n/**\n * The file has no pad here: the clients offer to recover one.\n *\n * @param {unknown} error\n * @return {boolean}\n */\nexport const isMissingBindingError = (error) => Boolean(error) && error.code === 'missing_binding'\n\n/**\n * Whether the same open may work later, so a client offers to try it\n * again: the server said so (`retryable`), the file changed while it was\n * being initialised (the server undid its part), or no answer came.\n *\n * Also after an initialise that got no answer: the second try opens\n * first, and finds the pad if the first initialise set it up. One still\n * running is safe to meet, since the server compares the file before it\n * writes, a file has one binding row, and a pad that lost either race is\n * rolled back.\n *\n * @param {unknown} error\n * @return {boolean}\n */\nexport const isRetryableOpenError = (error) => Boolean(error)\n\t&& (error.retryable === true || error.code === 'pad_file_changed' || isUnanswered(error))\n\n/**\n * A read-only view carries no pad URL by design; anything else without one\n * would reach an iframe as `undefined`.\n *\n * @param {any} data\n * @return {any}\n */\nexport const assertOpenPayload = (data) => {\n\tif (!data || (data.is_readonly_view !== true && padUrlFrom(data) === '')) {\n\t\tthrow new Error('Pad open API did not return a valid URL.')\n\t}\n\treturn data\n}\n\n/**\n * @param {any} data\n * @return {string}\n */\nexport const padUrlFrom = (data) => ((data && typeof data.url === 'string') ? data.url.trim() : '')\n\n/**\n * Open a pad, bootstrapping the file first if it has none yet.\n *\n * @param {object} steps\n * @param {() => Promise<any>} steps.open\n * @param {() => Promise<any>} steps.initialize\n * @param {() => boolean} [steps.stillWanted] asked once, after initialising\n * @return {Promise<any>} the payload; null only when a supplied\n *   `stillWanted` returns false\n */\nexport const openWithFrontmatterRecovery = async ({ open, initialize, stillWanted = () => true }) => {\n\ttry {\n\t\treturn await open()\n\t} catch (error) {\n\t\tif (!isMissingFrontmatterError(error)) {\n\t\t\tthrow error\n\t\t}\n\t\t// Not abortable: it creates a pad, writes a binding row and\n\t\t// rewrites the file.\n\t\tawait initialize()\n\t\t// The open after it mints a session and a cookie, so a caller that\n\t\t// has moved on should not pay for one.\n\t\tif (!stillWanted()) {\n\t\t\treturn null\n\t\t}\n\t\treturn await open()\n\t}\n}\n\n/**\n * @param {any} data\n * @return {{syncUrl: string, intervalMs: number}}\n */\nexport const syncSettingsFrom = (data) => {\n\tconst seconds = Number(data && data.sync_interval_seconds)\n\treturn {\n\t\tsyncUrl: (data && typeof data.sync_url === 'string') ? data.sync_url.trim() : '',\n\t\tintervalMs: (Number.isFinite(seconds) && seconds > 0)\n\t\t\t? Math.min(MAX_TIMER_MS, Math.max(MIN_INTERVAL_MS, seconds * 1000))\n\t\t\t: DEFAULT_INTERVAL_MS,\n\t}\n}\n\n/**\n * @param {any} data\n * @return {string}\n */\nexport const contentUrlFrom = (data) => ((data && typeof data.content_url === 'string') ? data.content_url.trim() : '')\n\n/**\n * Whether one of our own views draws this pad, and what it may link to. A\n * read-only view draws a pad the reader may not reach directly, so it has\n * no original to offer; only an external pad carries a link.\n *\n * @param {any} data\n * @return {{isContentView: boolean, externalUrl: string}}\n */\nexport const contentViewFrom = (data) => {\n\tconst isReadOnly = Boolean(data && data.is_readonly_view === true)\n\tconst url = padUrlFrom(data)\n\tconst isExternal = Boolean(data && data.is_external === true) && url !== ''\n\treturn {\n\t\tisContentView: isReadOnly || isExternal,\n\t\texternalUrl: (isExternal && !isReadOnly) ? url : 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\ No newline at end of file
diff --git a/l10n/de.js b/l10n/de.js
index 1ff4feb1..a196c82c 100644
--- a/l10n/de.js
+++ b/l10n/de.js
@@ -118,6 +118,7 @@ OC.L10N.register(
     "New pad": "Neues Pad",
     "Nextcloud and Etherpad share no parent domain, so the browser cannot send the session cookie to Etherpad and protected pads will not open. If a proxy exposes Etherpad under the Nextcloud domain, use that address as the base URL. Otherwise, place both services under a shared parent domain or switch protected pads off.": "Nextcloud und Etherpad haben keine gemeinsame übergeordnete Domain. Der Browser kann das Sitzungscookie deshalb nicht an Etherpad senden, und geschützte Pads lassen sich nicht öffnen. Wenn ein Proxy Etherpad unter der Nextcloud-Domain bereitstellt, trage diese Adresse als Basis-URL ein. Andernfalls betreibe beide Dienste unter einer gemeinsamen übergeordneten Domain oder schalte geschützte Pads ab.",
     "Nextcloud did not answer. Check your connection and try again.": "Nextcloud hat nicht geantwortet. Prüfe deine Verbindung und versuche es erneut.",
+    "Nextcloud did not answer. The pad may have been created anyway; look in the folder before you try again.": "Nextcloud hat nicht geantwortet. Das Pad wurde vielleicht trotzdem angelegt; sieh im Ordner nach, bevor du es erneut versuchst.",
     "Nextcloud runs on {nextcloud_host}, Etherpad on {etherpad_host}.": "Nextcloud läuft auf {nextcloud_host}, Etherpad auf {etherpad_host}.",
     "No .pad file selected. Open a .pad file from this shared folder.": "Keine .pad-Datei ausgewählt. Öffne eine .pad-Datei aus diesem freigegebenen Ordner.",
     "No shared templates yet.": "Noch keine geteilten Vorlagen.",
@@ -128,6 +129,7 @@ OC.L10N.register(
     "Open the original .pad file": "Ursprüngliche .pad-Datei öffnen",
     "Optional internal URL for server-side API calls. Leave empty to use Etherpad Base URL.": "Optionale interne URL für serverseitige API-Aufrufe. Leer lassen, um die Etherpad-Basis-URL zu verwenden.",
     "Pad binding is inconsistent. Please contact the share owner.": "Die Verknüpfung des Pads ist inkonsistent. Wende dich an die Person, die es freigegeben hat.",
+    "Pad creation failed.": "Beim Erstellen des Pads ist ein Fehler aufgetreten.",
     "Pad file is temporarily locked. Please retry.": "Die .pad-Datei ist gerade gesperrt. Versuche es erneut.",
     "Pad name is required.": "Pad-Name ist erforderlich.",
     "Pad types and behaviour": "Pad-Typen und Verhalten",
diff --git a/l10n/de.json b/l10n/de.json
index f52dfe49..69b467bd 100644
--- a/l10n/de.json
+++ b/l10n/de.json
@@ -117,6 +117,7 @@
         "New pad": "Neues Pad",
         "Nextcloud and Etherpad share no parent domain, so the browser cannot send the session cookie to Etherpad and protected pads will not open. If a proxy exposes Etherpad under the Nextcloud domain, use that address as the base URL. Otherwise, place both services under a shared parent domain or switch protected pads off.": "Nextcloud und Etherpad haben keine gemeinsame übergeordnete Domain. Der Browser kann das Sitzungscookie deshalb nicht an Etherpad senden, und geschützte Pads lassen sich nicht öffnen. Wenn ein Proxy Etherpad unter der Nextcloud-Domain bereitstellt, trage diese Adresse als Basis-URL ein. Andernfalls betreibe beide Dienste unter einer gemeinsamen übergeordneten Domain oder schalte geschützte Pads ab.",
         "Nextcloud did not answer. Check your connection and try again.": "Nextcloud hat nicht geantwortet. Prüfe deine Verbindung und versuche es erneut.",
+        "Nextcloud did not answer. The pad may have been created anyway; look in the folder before you try again.": "Nextcloud hat nicht geantwortet. Das Pad wurde vielleicht trotzdem angelegt; sieh im Ordner nach, bevor du es erneut versuchst.",
         "Nextcloud runs on {nextcloud_host}, Etherpad on {etherpad_host}.": "Nextcloud läuft auf {nextcloud_host}, Etherpad auf {etherpad_host}.",
         "No .pad file selected. Open a .pad file from this shared folder.": "Keine .pad-Datei ausgewählt. Öffne eine .pad-Datei aus diesem freigegebenen Ordner.",
         "No shared templates yet.": "Noch keine geteilten Vorlagen.",
@@ -127,6 +128,7 @@
         "Open the original .pad file": "Ursprüngliche .pad-Datei öffnen",
         "Optional internal URL for server-side API calls. Leave empty to use Etherpad Base URL.": "Optionale interne URL für serverseitige API-Aufrufe. Leer lassen, um die Etherpad-Basis-URL zu verwenden.",
         "Pad binding is inconsistent. Please contact the share owner.": "Die Verknüpfung des Pads ist inkonsistent. Wende dich an die Person, die es freigegeben hat.",
+        "Pad creation failed.": "Beim Erstellen des Pads ist ein Fehler aufgetreten.",
         "Pad file is temporarily locked. Please retry.": "Die .pad-Datei ist gerade gesperrt. Versuche es erneut.",
         "Pad name is required.": "Pad-Name ist erforderlich.",
         "Pad types and behaviour": "Pad-Typen und Verhalten",
diff --git a/l10n/es.js b/l10n/es.js
index 2759bf81..83d52475 100644
--- a/l10n/es.js
+++ b/l10n/es.js
@@ -118,6 +118,7 @@ OC.L10N.register(
     "New pad": "Nuevo pad",
     "Nextcloud and Etherpad share no parent domain, so the browser cannot send the session cookie to Etherpad and protected pads will not open. If a proxy exposes Etherpad under the Nextcloud domain, use that address as the base URL. Otherwise, place both services under a shared parent domain or switch protected pads off.": "Nextcloud y Etherpad no comparten ningún dominio padre común, así que el navegador no puede enviar la cookie de sesión a Etherpad y los pads protegidos no se abrirán. Si un proxy expone Etherpad bajo el dominio de Nextcloud, usa esa dirección como URL base. En caso contrario, sitúa ambos servicios bajo un dominio padre común o desactiva los pads protegidos.",
     "Nextcloud did not answer. Check your connection and try again.": "Nextcloud no ha respondido. Comprueba tu conexión y vuelve a intentarlo.",
+    "Nextcloud did not answer. The pad may have been created anyway; look in the folder before you try again.": "Nextcloud no ha respondido. Puede que el pad se haya creado de todos modos; mira en la carpeta antes de volver a intentarlo.",
     "Nextcloud runs on {nextcloud_host}, Etherpad on {etherpad_host}.": "Nextcloud se ejecuta en {nextcloud_host} y Etherpad en {etherpad_host}.",
     "No .pad file selected. Open a .pad file from this shared folder.": "No se ha seleccionado ningún archivo .pad. Abre un archivo .pad de esta carpeta compartida.",
     "No shared templates yet.": "Todavía no hay plantillas compartidas.",
@@ -128,6 +129,7 @@ OC.L10N.register(
     "Open the original .pad file": "Abrir el archivo .pad original",
     "Optional internal URL for server-side API calls. Leave empty to use Etherpad Base URL.": "URL interna opcional para llamadas a la API del lado del servidor. Déjala vacía para usar la URL base de Etherpad.",
     "Pad binding is inconsistent. Please contact the share owner.": "El vínculo del pad es incoherente. Ponte en contacto con quien lo ha compartido.",
+    "Pad creation failed.": "Se produjo un error al crear el pad.",
     "Pad file is temporarily locked. Please retry.": "El archivo .pad está bloqueado temporalmente. Vuelve a intentarlo.",
     "Pad name is required.": "Se requiere el nombre del pad.",
     "Pad types and behaviour": "Tipos de pad y comportamiento",
diff --git a/l10n/es.json b/l10n/es.json
index d65f8604..03e6b356 100644
--- a/l10n/es.json
+++ b/l10n/es.json
@@ -117,6 +117,7 @@
         "New pad": "Nuevo pad",
         "Nextcloud and Etherpad share no parent domain, so the browser cannot send the session cookie to Etherpad and protected pads will not open. If a proxy exposes Etherpad under the Nextcloud domain, use that address as the base URL. Otherwise, place both services under a shared parent domain or switch protected pads off.": "Nextcloud y Etherpad no comparten ningún dominio padre común, así que el navegador no puede enviar la cookie de sesión a Etherpad y los pads protegidos no se abrirán. Si un proxy expone Etherpad bajo el dominio de Nextcloud, usa esa dirección como URL base. En caso contrario, sitúa ambos servicios bajo un dominio padre común o desactiva los pads protegidos.",
         "Nextcloud did not answer. Check your connection and try again.": "Nextcloud no ha respondido. Comprueba tu conexión y vuelve a intentarlo.",
+        "Nextcloud did not answer. The pad may have been created anyway; look in the folder before you try again.": "Nextcloud no ha respondido. Puede que el pad se haya creado de todos modos; mira en la carpeta antes de volver a intentarlo.",
         "Nextcloud runs on {nextcloud_host}, Etherpad on {etherpad_host}.": "Nextcloud se ejecuta en {nextcloud_host} y Etherpad en {etherpad_host}.",
         "No .pad file selected. Open a .pad file from this shared folder.": "No se ha seleccionado ningún archivo .pad. Abre un archivo .pad de esta carpeta compartida.",
         "No shared templates yet.": "Todavía no hay plantillas compartidas.",
@@ -127,6 +128,7 @@
         "Open the original .pad file": "Abrir el archivo .pad original",
         "Optional internal URL for server-side API calls. Leave empty to use Etherpad Base URL.": "URL interna opcional para llamadas a la API del lado del servidor. Déjala vacía para usar la URL base de Etherpad.",
         "Pad binding is inconsistent. Please contact the share owner.": "El vínculo del pad es incoherente. Ponte en contacto con quien lo ha compartido.",
+        "Pad creation failed.": "Se produjo un error al crear el pad.",
         "Pad file is temporarily locked. Please retry.": "El archivo .pad está bloqueado temporalmente. Vuelve a intentarlo.",
         "Pad name is required.": "Se requiere el nombre del pad.",
         "Pad types and behaviour": "Tipos de pad y comportamiento",
diff --git a/l10n/fr.js b/l10n/fr.js
index f7ff47fe..8a3b2115 100644
--- a/l10n/fr.js
+++ b/l10n/fr.js
@@ -118,6 +118,7 @@ OC.L10N.register(
     "New pad": "Nouveau pad",
     "Nextcloud and Etherpad share no parent domain, so the browser cannot send the session cookie to Etherpad and protected pads will not open. If a proxy exposes Etherpad under the Nextcloud domain, use that address as the base URL. Otherwise, place both services under a shared parent domain or switch protected pads off.": "Nextcloud et Etherpad ne partagent aucun domaine parent : le navigateur ne peut donc pas envoyer le cookie de session à Etherpad, et les pads protégés ne s'ouvriront pas. Si un proxy expose Etherpad sous le domaine Nextcloud, utilisez cette adresse comme URL de base. Sinon, placez les deux services sous un domaine parent commun ou désactivez les pads protégés.",
     "Nextcloud did not answer. Check your connection and try again.": "Nextcloud n'a pas répondu. Vérifiez votre connexion et réessayez.",
+    "Nextcloud did not answer. The pad may have been created anyway; look in the folder before you try again.": "Nextcloud n'a pas répondu. Le pad a peut-être été créé malgré tout ; vérifiez le dossier avant de réessayer.",
     "Nextcloud runs on {nextcloud_host}, Etherpad on {etherpad_host}.": "Nextcloud tourne sur {nextcloud_host}, Etherpad sur {etherpad_host}.",
     "No .pad file selected. Open a .pad file from this shared folder.": "Aucun fichier .pad sélectionné. Ouvrez un fichier .pad de ce dossier partagé.",
     "No shared templates yet.": "Aucun modèle partagé pour le moment.",
@@ -128,6 +129,7 @@ OC.L10N.register(
     "Open the original .pad file": "Ouvrir le fichier .pad d’origine",
     "Optional internal URL for server-side API calls. Leave empty to use Etherpad Base URL.": "URL interne optionnelle pour les appels à l'API côté serveur. Laisser vide pour utiliser l'URL de base Etherpad.",
     "Pad binding is inconsistent. Please contact the share owner.": "Le lien du pad est incohérent. Contactez la personne qui l'a partagé.",
+    "Pad creation failed.": "Une erreur s'est produite lors de la création du pad.",
     "Pad file is temporarily locked. Please retry.": "Le fichier .pad est temporairement verrouillé. Réessayez.",
     "Pad name is required.": "Le nom du pad est obligatoire.",
     "Pad types and behaviour": "Types de pads et comportement",
diff --git a/l10n/fr.json b/l10n/fr.json
index 65c1ba0c..b098f4a0 100644
--- a/l10n/fr.json
+++ b/l10n/fr.json
@@ -117,6 +117,7 @@
         "New pad": "Nouveau pad",
         "Nextcloud and Etherpad share no parent domain, so the browser cannot send the session cookie to Etherpad and protected pads will not open. If a proxy exposes Etherpad under the Nextcloud domain, use that address as the base URL. Otherwise, place both services under a shared parent domain or switch protected pads off.": "Nextcloud et Etherpad ne partagent aucun domaine parent : le navigateur ne peut donc pas envoyer le cookie de session à Etherpad, et les pads protégés ne s'ouvriront pas. Si un proxy expose Etherpad sous le domaine Nextcloud, utilisez cette adresse comme URL de base. Sinon, placez les deux services sous un domaine parent commun ou désactivez les pads protégés.",
         "Nextcloud did not answer. Check your connection and try again.": "Nextcloud n'a pas répondu. Vérifiez votre connexion et réessayez.",
+        "Nextcloud did not answer. The pad may have been created anyway; look in the folder before you try again.": "Nextcloud n'a pas répondu. Le pad a peut-être été créé malgré tout ; vérifiez le dossier avant de réessayer.",
         "Nextcloud runs on {nextcloud_host}, Etherpad on {etherpad_host}.": "Nextcloud tourne sur {nextcloud_host}, Etherpad sur {etherpad_host}.",
         "No .pad file selected. Open a .pad file from this shared folder.": "Aucun fichier .pad sélectionné. Ouvrez un fichier .pad de ce dossier partagé.",
         "No shared templates yet.": "Aucun modèle partagé pour le moment.",
@@ -127,6 +128,7 @@
         "Open the original .pad file": "Ouvrir le fichier .pad d’origine",
         "Optional internal URL for server-side API calls. Leave empty to use Etherpad Base URL.": "URL interne optionnelle pour les appels à l'API côté serveur. Laisser vide pour utiliser l'URL de base Etherpad.",
         "Pad binding is inconsistent. Please contact the share owner.": "Le lien du pad est incohérent. Contactez la personne qui l'a partagé.",
+        "Pad creation failed.": "Une erreur s'est produite lors de la création du pad.",
         "Pad file is temporarily locked. Please retry.": "Le fichier .pad est temporairement verrouillé. Réessayez.",
         "Pad name is required.": "Le nom du pad est obligatoire.",
         "Pad types and behaviour": "Types de pads et comportement",
diff --git a/l10n/it.js b/l10n/it.js
index d49f76a9..738436db 100644
--- a/l10n/it.js
+++ b/l10n/it.js
@@ -118,6 +118,7 @@ OC.L10N.register(
     "New pad": "Nuovo pad",
     "Nextcloud and Etherpad share no parent domain, so the browser cannot send the session cookie to Etherpad and protected pads will not open. If a proxy exposes Etherpad under the Nextcloud domain, use that address as the base URL. Otherwise, place both services under a shared parent domain or switch protected pads off.": "Nextcloud ed Etherpad non condividono alcun parent domain, quindi il browser non può inviare il cookie di sessione a Etherpad e i pad protetti non si apriranno. Se un proxy espone Etherpad sotto il dominio di Nextcloud, usa quell'indirizzo come URL base. Altrimenti colloca entrambi i servizi sotto un parent domain comune, oppure disattiva i pad protetti.",
     "Nextcloud did not answer. Check your connection and try again.": "Nextcloud non ha risposto. Controlla la connessione e riprova.",
+    "Nextcloud did not answer. The pad may have been created anyway; look in the folder before you try again.": "Nextcloud non ha risposto. Il pad potrebbe essere stato creato comunque; controlla la cartella prima di riprovare.",
     "Nextcloud runs on {nextcloud_host}, Etherpad on {etherpad_host}.": "Nextcloud è in esecuzione su {nextcloud_host}, Etherpad su {etherpad_host}.",
     "No .pad file selected. Open a .pad file from this shared folder.": "Nessun file .pad selezionato. Apri un file .pad da questa cartella condivisa.",
     "No shared templates yet.": "Non ci sono ancora modelli condivisi.",
@@ -128,6 +129,7 @@ OC.L10N.register(
     "Open the original .pad file": "Apri il file .pad originale",
     "Optional internal URL for server-side API calls. Leave empty to use Etherpad Base URL.": "URL interno opzionale per le chiamate API lato server. Lascia vuoto per usare l'URL base Etherpad.",
     "Pad binding is inconsistent. Please contact the share owner.": "Il collegamento del pad è incoerente. Contatta chi lo ha condiviso.",
+    "Pad creation failed.": "Si è verificato un errore durante la creazione del pad.",
     "Pad file is temporarily locked. Please retry.": "Il file .pad è temporaneamente bloccato. Riprova.",
     "Pad name is required.": "Il nome del pad è obbligatorio.",
     "Pad types and behaviour": "Tipi di pad e comportamento",
diff --git a/l10n/it.json b/l10n/it.json
index f8218851..6cb098d8 100644
--- a/l10n/it.json
+++ b/l10n/it.json
@@ -117,6 +117,7 @@
         "New pad": "Nuovo pad",
         "Nextcloud and Etherpad share no parent domain, so the browser cannot send the session cookie to Etherpad and protected pads will not open. If a proxy exposes Etherpad under the Nextcloud domain, use that address as the base URL. Otherwise, place both services under a shared parent domain or switch protected pads off.": "Nextcloud ed Etherpad non condividono alcun parent domain, quindi il browser non può inviare il cookie di sessione a Etherpad e i pad protetti non si apriranno. Se un proxy espone Etherpad sotto il dominio di Nextcloud, usa quell'indirizzo come URL base. Altrimenti colloca entrambi i servizi sotto un parent domain comune, oppure disattiva i pad protetti.",
         "Nextcloud did not answer. Check your connection and try again.": "Nextcloud non ha risposto. Controlla la connessione e riprova.",
+        "Nextcloud did not answer. The pad may have been created anyway; look in the folder before you try again.": "Nextcloud non ha risposto. Il pad potrebbe essere stato creato comunque; controlla la cartella prima di riprovare.",
         "Nextcloud runs on {nextcloud_host}, Etherpad on {etherpad_host}.": "Nextcloud è in esecuzione su {nextcloud_host}, Etherpad su {etherpad_host}.",
         "No .pad file selected. Open a .pad file from this shared folder.": "Nessun file .pad selezionato. Apri un file .pad da questa cartella condivisa.",
         "No shared templates yet.": "Non ci sono ancora modelli condivisi.",
@@ -127,6 +128,7 @@
         "Open the original .pad file": "Apri il file .pad originale",
         "Optional internal URL for server-side API calls. Leave empty to use Etherpad Base URL.": "URL interno opzionale per le chiamate API lato server. Lascia vuoto per usare l'URL base Etherpad.",
         "Pad binding is inconsistent. Please contact the share owner.": "Il collegamento del pad è incoerente. Contatta chi lo ha condiviso.",
+        "Pad creation failed.": "Si è verificato un errore durante la creazione del pad.",
         "Pad file is temporarily locked. Please retry.": "Il file .pad è temporaneamente bloccato. Riprova.",
         "Pad name is required.": "Il nome del pad è obbligatorio.",
         "Pad types and behaviour": "Tipi di pad e comportamento",
diff --git a/lib/Controller/EmbedController.php b/lib/Controller/EmbedController.php
index 0ae5c05f..cb3e6fa3 100644
--- a/lib/Controller/EmbedController.php
+++ b/lib/Controller/EmbedController.php
@@ -114,6 +114,8 @@ function () use ($parentFolderId): array {
 					'missing_name' => $this->l10n->t('Pad name is required.'),
 					'invalid_access_mode' => $this->l10n->t('Invalid access mode.'),
 					'incomplete_config' => $this->l10n->t('Embed configuration is incomplete.'),
+					'unanswered' => $this->l10n->t('Nextcloud did not answer. The pad may have been created anyway; look in the folder before you try again.'),
+					'failed' => $this->l10n->t('Pad creation failed.'),
 				],
 			]),
 			errorTitle: $this->l10n->t('Could not create pad'),
diff --git a/src/embed-create-main.js b/src/embed-create-main.js
index 9316d79c..7e9c8452 100644
--- a/src/embed-create-main.js
+++ b/src/embed-create-main.js
@@ -4,7 +4,7 @@
  */
 import { DEFAULT_PAD_ACCESS_MODE, isPadAccessMode } from './lib/constants.js'
 import { ocRequestToken } from './lib/oc-compat.js'
-import { fetchJsonWithTimeout as fetchJson } from './lib/fetch-helpers.js'
+import { fetchJsonWithTimeout as fetchJson, isUnanswered } from './lib/fetch-helpers.js'
 
 (function () {
 	const root = document.getElementById('etherpad-nextcloud-embed-create')
@@ -18,6 +18,8 @@ import { fetchJsonWithTimeout as fetchJson } from './lib/fetch-helpers.js'
 	const missingNameMessage = String(root.getAttribute('data-l10n-missing-name') || 'Pad name is required.')
 	const invalidAccessModeMessage = String(root.getAttribute('data-l10n-invalid-access-mode') || 'Invalid access mode.')
 	const incompleteConfigMessage = String(root.getAttribute('data-l10n-incomplete-config') || 'Embed configuration is incomplete.')
+	const unansweredMessage = String(root.getAttribute('data-l10n-unanswered') || 'Nextcloud did not answer. The pad may have been created anyway; look in the folder before you try again.')
+	const failedMessage = String(root.getAttribute('data-l10n-failed') || 'Pad creation failed.')
 	const loadingNode = root.querySelector('[data-epnc-embed-create-loading]')
 	const errorNode = root.querySelector('[data-epnc-embed-create-error]')
 	const errorMessageNode = root.querySelector('[data-epnc-embed-create-error-message]')
@@ -68,20 +70,23 @@ import { fetchJsonWithTimeout as fetchJson } from './lib/fetch-helpers.js'
 	 * land in the iframe as "Unknown error." but in the postMessage payload as
 	 * the empty string).
 	 *
-	 * `reason` is a coarse bucket so hosts can branch without parsing the
-	 * HTTP status:
-	 *   - 'invalid' — client-side validation failed (missing name, etc.)
-	 *   - 'conflict' — backend returned 409 (e.g. duplicate filename)
-	 *   - 'server'  — any other 4xx / 5xx
-	 *   - 'network' — fetch itself failed (offline, CORS, timeout)
+	 * The host contract is in docs/architecture.md (the create flow);
+	 * `reason` in short:
+	 *   - 'invalid' — client-side validation failed
+	 *   - 'conflict' — a 409
+	 *   - 'server' — refused with another 4xx, or this app's own 5xx
+	 *   - 'network' — no answer from this app; the pad may exist
+	 * `code` and `retryable` are the server's, `null` and `false` without.
 	 */
-	const failCreate = (reason, message, status) => {
+	const failCreate = (reason, message, status, answer = null) => {
 		const normalizedMessage = String(message || 'Unknown error.')
 		showError(normalizedMessage)
 		postHostMessage('epnc:create-failed', {
 			reason,
 			status: typeof status === 'number' ? status : null,
 			message: normalizedMessage,
+			code: answer && typeof answer.code === 'string' ? answer.code : null,
+			retryable: Boolean(answer) && answer.retryable === true,
 		})
 	}
 
@@ -101,13 +106,6 @@ import { fetchJsonWithTimeout as fetchJson } from './lib/fetch-helpers.js'
 		return url.pathname + url.search + url.hash
 	}
 
-	const classifyHttpStatus = (status) => {
-		if (status === 409) {
-			return 'conflict'
-		}
-		return 'server'
-	}
-
 	const run = async () => {
 		if (!Number.isFinite(parentFolderId) || parentFolderId <= 0 || createByParentUrl === '') {
 			failCreate('invalid', incompleteConfigMessage)
@@ -133,9 +131,10 @@ import { fetchJsonWithTimeout as fetchJson } from './lib/fetch-helpers.js'
 		body.set('name', name)
 		body.set('accessMode', accessMode)
 
-		// Step 1: server-side create. Failures here are either network
-		// (fetch threw — no HTTP status reached us) or server (we got a
-		// status code back, including the 409 on duplicate filename).
+		// Step 1: server-side create. A write, so it has no time limit (see
+		// fetchJsonWithTimeout()): cut short, it would go on creating with
+		// nobody told, and a second try would meet the file it made. A slow
+		// create is not a failed one.
 		let data
 		try {
 			data = await fetchJson(createByParentUrl, {
@@ -145,12 +144,23 @@ import { fetchJsonWithTimeout as fetchJson } from './lib/fetch-helpers.js'
 					requesttoken: requestToken(),
 				},
 				body: body.toString(),
-			})
+			}, { timeoutMs: null, fallbackMessage: failedMessage })
 		} catch (error) {
 			const status = (error && typeof error.status === 'number') ? error.status : null
-			const message = error instanceof Error ? error.message : 'Pad creation failed.'
-			const reason = status === null ? 'network' : classifyHttpStatus(status)
-			failCreate(reason, message, status)
+			const unanswered = isUnanswered(error)
+			const message = !unanswered && error instanceof Error && error.message ? error.message : failedMessage
+			// Refused, even if the body then broke off: nothing was made.
+			if (status !== null && status >= 400 && status < 500) {
+				failCreate(status === 409 ? 'conflict' : 'server', message, status, error)
+				return
+			}
+			// No answer from this app: whether the pad was made is not known.
+			if (status === null || unanswered) {
+				failCreate('network', unansweredMessage, status)
+				return
+			}
+			// This app's own 5xx, rolled back as far as it could.
+			failCreate('server', message, status, error)
 			return
 		}
 
diff --git a/src/embed-main.js b/src/embed-main.js
index 34defb8f..4ccc9308 100644
--- a/src/embed-main.js
+++ b/src/embed-main.js
@@ -4,7 +4,7 @@
  */
 import { ocRequestToken } from './lib/oc-compat.js'
 import { createPadSync } from './lib/pad-sync.js'
-import { fetchJsonWithTimeout as fetchJson, requestErrorMessage } from './lib/fetch-helpers.js'
+import { fetchJsonWithTimeout as fetchJson, isUnanswered, requestErrorMessage } from './lib/fetch-helpers.js'
 import { handFocusTo } from './lib/hand-focus.js'
 import { loadPadContent } from './lib/pad-content.js'
 import { assertOpenPayload, contentUrlFrom, contentViewFrom, isMissingBindingError, isRetryableOpenError, openWithFrontmatterRecovery, padUrlFrom, syncSettingsFrom } from './lib/pad-open-flow.js'
@@ -446,7 +446,7 @@ import { assertOpenPayload, contentUrlFrom, contentViewFrom, isMissingBindingErr
 		} catch (error) {
 			// No answer: the pad may be set up by now, and another recovery
 			// would meet it. Opening tells, and is safe to repeat.
-			if (error && error.unanswered === true) {
+			if (isUnanswered(error)) {
 				void run(true)
 				return
 			}
diff --git a/src/lib/fetch-helpers.js b/src/lib/fetch-helpers.js
index 1e4f017a..3cabbb7f 100644
--- a/src/lib/fetch-helpers.js
+++ b/src/lib/fetch-helpers.js
@@ -20,10 +20,11 @@ const GATEWAY_STATUSES = [502, 503, 504]
  * a second pad and orphans the first. Slow is not the same as stuck.
  *
  * An error carries the server's `code` and `retryable` when it sent them,
- * and `unanswered` when nothing came back from this app: our own timeout,
- * a failed network, or a gateway answering in its place. Only that fact:
- * whether the same request is worth another try depends on whether it
- * writes, which the caller knows (`isRetryableOpenError` for an open).
+ * `status` whenever one came, and `unanswered` when nothing came back from
+ * this app (docs/architecture.md, "Errors of the API", says which failures
+ * count). Only that fact: whether the same request is worth another try
+ * depends on whether it writes, which the caller knows
+ * (`isRetryableOpenError` for an open).
  */
 export const fetchJsonWithTimeout = async (url, init = {}, options = {}) => {
 	const { timeoutMs = DEFAULT_REQUEST_TIMEOUT_MS, fallbackMessage = 'Request failed.' } = options
@@ -42,18 +43,22 @@ export const fetchJsonWithTimeout = async (url, init = {}, options = {}) => {
 		}
 	}
 	const headers = Object.assign({ Accept: 'application/json' }, init.headers || {})
+	let status = null
 	try {
 		const response = await fetch(url, Object.assign({}, init, {
 			credentials: 'same-origin',
 			headers,
 			signal: controller.signal,
 		}))
+		status = response.status
 		// Only a body that is not JSON counts as none. A timeout or a failed
 		// network while it streams in is no answer, and is handled below.
+		let isJson = true
 		const data = await response.json().catch((error) => {
 			if (!(error instanceof SyntaxError)) {
 				throw error
 			}
+			isJson = false
 			return {}
 		})
 		if (!response.ok) {
@@ -66,11 +71,9 @@ export const fetchJsonWithTimeout = async (url, init = {}, options = {}) => {
 			if (data && data.retryable === true) {
 				error.retryable = true
 			}
-			// This app never answers 502 or 504, and every 503 of its own
-			// carries retryable (docs/api-reference.md). Without it, a proxy
-			// with its backend gone or Nextcloud in maintenance answered in
-			// its place, with a page or with JSON of its own.
-			if (GATEWAY_STATUSES.includes(response.status) && error.retryable !== true) {
+			// A 5xx that cannot be this app's (docs/architecture.md, "Errors of the API").
+			const isGateway = GATEWAY_STATUSES.includes(response.status) && error.retryable !== true
+			if (response.status >= 500 && (!isJson || isGateway)) {
 				error.unanswered = true
 			}
 			error.status = response.status
@@ -88,12 +91,18 @@ export const fetchJsonWithTimeout = async (url, init = {}, options = {}) => {
 			}
 			const timedOut = new Error('Request timed out.')
 			timedOut.unanswered = true
+			if (status !== null) {
+				timedOut.status = status
+			}
 			throw timedOut
 		}
 		// fetch() and reading the body reject with a TypeError when the
 		// network fails.
 		if (error instanceof TypeError) {
 			error.unanswered = true
+			if (status !== null) {
+				error.status = status
+			}
 		}
 		throw error
 	} finally {
@@ -106,6 +115,14 @@ export const fetchJsonWithTimeout = async (url, init = {}, options = {}) => {
 	}
 }
 
+/**
+ * Whether nothing came back from this app (see fetchJsonWithTimeout()).
+ *
+ * @param {unknown} error
+ * @return {boolean}
+ */
+export const isUnanswered = (error) => Boolean(error) && error.unanswered === true
+
 /**
  * What to show for a failed request: the server's sentence, or, when
  * nothing came back, the caller's translated `unansweredText` rather than
@@ -117,7 +134,7 @@ export const fetchJsonWithTimeout = async (url, init = {}, options = {}) => {
  * @return {string}
  */
 export const requestErrorMessage = (error, unansweredText, fallbackText) => {
-	if (error && error.unanswered === true) {
+	if (isUnanswered(error)) {
 		return unansweredText
 	}
 	return error instanceof Error && error.message ? error.message : fallbackText
diff --git a/src/lib/pad-open-flow.js b/src/lib/pad-open-flow.js
index 050501e0..40a1848f 100644
--- a/src/lib/pad-open-flow.js
+++ b/src/lib/pad-open-flow.js
@@ -2,6 +2,7 @@
  * SPDX-License-Identifier: AGPL-3.0-or-later
  * Copyright (c) 2026 Jacob Bühler
  */
+import { isUnanswered } from './fetch-helpers.js'
 
 /**
  * A floor, and the largest delay `setInterval` can hold - a signed 32-bit
@@ -45,7 +46,7 @@ export const isMissingBindingError = (error) => Boolean(error) && error.code ===
  * @return {boolean}
  */
 export const isRetryableOpenError = (error) => Boolean(error)
-	&& (error.retryable === true || error.code === 'pad_file_changed' || error.unanswered === true)
+	&& (error.retryable === true || error.code === 'pad_file_changed' || isUnanswered(error))
 
 /**
  * A read-only view carries no pad URL by design; anything else without one
diff --git a/src/viewer-main.js b/src/viewer-main.js
index 1ed152db..0d71440f 100644
--- a/src/viewer-main.js
+++ b/src/viewer-main.js
@@ -7,7 +7,7 @@
 
 import { APP_ID } from './lib/constants.js'
 import { apiFindOriginalPad, apiRecoverFromSnapshot, apiResolvePadByPath } from './lib/api-client.js'
-import { fetchJsonWithTimeout, requestErrorMessage } from './lib/fetch-helpers.js'
+import { fetchJsonWithTimeout, isUnanswered, requestErrorMessage } from './lib/fetch-helpers.js'
 import { handFocusTo } from './lib/hand-focus.js'
 import { ocGenerateUrl, ocRequestToken, translate } from './lib/oc-compat.js'
 import { createPadSync } from './lib/pad-sync.js'
@@ -383,7 +383,7 @@ const component = {
 			} catch (error) {
 				// No answer: the pad may be set up by now, and another
 				// recovery would meet it. Opening tells, and is safe to repeat.
-				if (error && error.unanswered === true) {
+				if (isUnanswered(error)) {
 					await this.resolveOpenUrl(true)
 					return
 				}
diff --git a/templates/embed-create.php b/templates/embed-create.php
index a38bfd58..43314d15 100644
--- a/templates/embed-create.php
+++ b/templates/embed-create.php
@@ -17,7 +17,9 @@ class="epnc-embed"
 	data-l10n-error-title="<?php p((string)$_['l10n']['error_title']); ?>"
 	data-l10n-missing-name="<?php p((string)$_['l10n']['missing_name']); ?>"
 	data-l10n-invalid-access-mode="<?php p((string)$_['l10n']['invalid_access_mode']); ?>"
-	data-l10n-incomplete-config="<?php p((string)$_['l10n']['incomplete_config']); ?>">
+	data-l10n-incomplete-config="<?php p((string)$_['l10n']['incomplete_config']); ?>"
+	data-l10n-unanswered="<?php p((string)$_['l10n']['unanswered']); ?>"
+	data-l10n-failed="<?php p((string)$_['l10n']['failed']); ?>">
 	<div class="epnc-embed__loading" data-epnc-embed-create-loading>
 		<?php p((string)$_['l10n']['loading']); ?>
 	</div>
diff --git a/tests/js/embed-create-main.test.js b/tests/js/embed-create-main.test.js
index dea82d76..aecc1110 100644
--- a/tests/js/embed-create-main.test.js
+++ b/tests/js/embed-create-main.test.js
@@ -4,8 +4,12 @@
  */
 import { afterEach, beforeEach, describe, expect, it, vi } from 'vitest'
 import { flushAsyncWork } from './flush.js'
+import { FILE_CHANGED, LOCKED } from './answers.js'
+import { brokenBody, errorResponse, jsonResponse, pageResponse } from './responses.js'
 
-
+// The page's sentences for no answer and for a failure without one.
+const NO_ANSWER = 'No answer; look in the folder first.'
+const CREATE_FAILED = 'Anlegen fehlgeschlagen.'
 
 const setupEmbedCreateDom = () => {
 	document.body.innerHTML = `
@@ -16,7 +20,9 @@ const setupEmbedCreateDom = () => {
 			data-request-token="csrf"
 			data-l10n-missing-name="Pad name is required."
 			data-l10n-invalid-access-mode="Invalid access mode."
-			data-l10n-incomplete-config="Embed configuration is incomplete.">
+			data-l10n-incomplete-config="Embed configuration is incomplete."
+			data-l10n-unanswered="${NO_ANSWER}"
+			data-l10n-failed="${CREATE_FAILED}">
 			<div data-epnc-embed-create-loading>loading</div>
 			<div data-epnc-embed-create-error hidden>
 				<p data-epnc-embed-create-error-message></p>
@@ -25,14 +31,6 @@ const setupEmbedCreateDom = () => {
 	`
 }
 
-const jsonResponse = (body, ok = true, status = 200) => ({
-	ok,
-	status,
-	json: () => Promise.resolve(body),
-})
-
-const errorResponse = (body, status = 400) => jsonResponse(body, false, status)
-
 const errorMessageText = () => document.querySelector('[data-epnc-embed-create-error-message]').textContent
 const errorPanelHidden = () => document.querySelector('[data-epnc-embed-create-error]').hidden
 
@@ -145,56 +143,71 @@ describe('embed-create-main', () => {
 		expect(locationReplaceSpy).toHaveBeenCalledWith('/embed/by-id/778')
 	})
 
-	it('posts epnc:create-failed with reason=conflict on a 409 from the API', async () => {
-		fetch.mockResolvedValueOnce(errorResponse(
-			{ message: 'A file with this name already exists.' },
-			409,
-		))
+	/**
+	 * What the host is told, and the page shows, for each way a create can
+	 * fail. Which failures count as no answer is the helper's to test; here
+	 * one of each kind.
+	 */
+	it.each([
+		['the network failing', new TypeError('Failed to fetch'), 'network', null, NO_ANSWER],
+		['the browser stopping the request', new DOMException('The operation was aborted.', 'AbortError'), 'network', null, NO_ANSWER],
+		['a proxy whose backend is gone', pageResponse(502), 'network', 502, NO_ANSWER],
+		['a success whose body broke off', brokenBody(200), 'network', 200, NO_ANSWER],
+		['a name taken', errorResponse({ message: 'A file with this name already exists.' }, 409), 'conflict', 409, 'A file with this name already exists.'],
+		['a file changed while its pad was set up', errorResponse(FILE_CHANGED, 409), 'conflict', 409, FILE_CHANGED.message, { code: 'pad_file_changed' }],
+		['a name taken whose body broke off', brokenBody(409), 'conflict', 409, CREATE_FAILED],
+		['a pad type switched off', errorResponse({ message: 'This pad type is disabled on this instance.', code: 'pad_type_disabled', access_mode: 'protected' }, 403), 'server', 403, 'This pad type is disabled on this instance.', { code: 'pad_type_disabled' }],
+		['a proxy refusing a body too large', pageResponse(413), 'server', 413, CREATE_FAILED],
+		['this app failing', errorResponse({ message: 'Could not create pad' }, 500), 'server', 500, 'Could not create pad'],
+		['this app failing without a sentence', errorResponse({}, 500), 'server', 500, CREATE_FAILED],
+		['this app, the folder locked', errorResponse(LOCKED, 503), 'server', 503, LOCKED.message, { retryable: true }],
+	])('tells the host what came of %s', async (_, outcome, reason, status, message, answer = {}) => {
+		if (outcome instanceof Error) {
+			fetch.mockRejectedValueOnce(outcome)
+		} else {
+			fetch.mockResolvedValueOnce(outcome)
+		}
 
 		await importEmbedCreate()
 		await flushAsyncWork()
 
 		expect(parentPostSpy).toHaveBeenCalledOnce()
-		const payload = parentPostSpy.mock.calls[0][0]
-		expect(payload.type).toBe('epnc:create-failed')
-		expect(payload.reason).toBe('conflict')
-		expect(payload.status).toBe(409)
-		expect(payload.message).toBe('A file with this name already exists.')
-
-		// Inline error stays visible for users who can actually see the iframe.
+		expect(parentPostSpy.mock.calls[0][0]).toEqual({
+			type: 'epnc:create-failed',
+			reason,
+			status,
+			message,
+			code: answer.code ?? null,
+			retryable: answer.retryable ?? false,
+		})
+		// Inline too, for those who can see the iframe, and no redirect.
 		expect(errorPanelHidden()).toBe(false)
-		expect(errorMessageText()).toBe('A file with this name already exists.')
-
-		// No redirect on failure.
+		expect(errorMessageText()).toBe(message)
 		expect(locationReplaceSpy).not.toHaveBeenCalled()
 	})
 
-	it('posts epnc:create-failed with reason=server on a 5xx response', async () => {
-		fetch.mockResolvedValueOnce(errorResponse(
-			{ message: 'Could not create pad' },
-			500,
-		))
-
-		await importEmbedCreate()
-		await flushAsyncWork()
-
-		const payload = parentPostSpy.mock.calls[0][0]
-		expect(payload.type).toBe('epnc:create-failed')
-		expect(payload.reason).toBe('server')
-		expect(payload.status).toBe(500)
-	})
-
-	it('posts epnc:create-failed with reason=network when fetch itself throws', async () => {
-		fetch.mockRejectedValueOnce(new Error('Network unreachable'))
-
-		await importEmbedCreate()
-		await flushAsyncWork()
-
-		const payload = parentPostSpy.mock.calls[0][0]
-		expect(payload.type).toBe('epnc:create-failed')
-		expect(payload.reason).toBe('network')
-		expect(payload.status).toBe(null)
-		expect(payload.message).toBe('Network unreachable')
+	// A write: cut short, it would go on creating with nobody told.
+	it('waits for a slow create instead of calling it failed', async () => {
+		vi.useFakeTimers()
+		try {
+			let settle
+			fetch.mockImplementationOnce((url, init) => new Promise((resolve, reject) => {
+				init.signal.addEventListener('abort', () => reject(new DOMException('aborted', 'AbortError')))
+				settle = () => resolve(jsonResponse({ embed_url: '/embed/by-id/777', file_id: 777, pad_id: 'g.abc$mypad', access_mode: 'protected' }))
+			}))
+
+			await importEmbedCreate()
+			await vi.advanceTimersByTimeAsync(60_000)
+			expect(parentPostSpy).not.toHaveBeenCalled()
+			settle()
+			await flushAsyncWork()
+
+			expect(parentPostSpy).toHaveBeenCalledOnce()
+			expect(parentPostSpy.mock.calls[0][0].type).toBe('epnc:create-succeeded')
+			expect(locationReplaceSpy).toHaveBeenCalledWith('/embed/by-id/777')
+		} finally {
+			vi.useRealTimers()
+		}
 	})
 
 	it('posts epnc:create-failed with reason=invalid when launcher params are missing', async () => {
diff --git a/tests/js/embed-main.test.js b/tests/js/embed-main.test.js
index ce2c3e99..aadf4ba9 100644
--- a/tests/js/embed-main.test.js
+++ b/tests/js/embed-main.test.js
@@ -5,6 +5,7 @@
 import { afterEach, beforeEach, describe, expect, it, vi } from 'vitest'
 import { flushAsyncWork } from './flush.js'
 import { FILE_CHANGED, LOST_RACE, MISSING_BINDING, MISSING_FRONTMATTER, UNANSWERED_TEXT, UNREACHABLE, WAITING } from './answers.js'
+import { errorResponse, jsonResponse } from './responses.js'
 
 // A successful open starts an interval and registers document and window
 // listeners that nothing here can stop again. No test asserts on syncing.
@@ -26,8 +27,6 @@ vi.mock('../../src/lib/pad-content.js', () => ({
 
 const { loadPadContent } = await import('../../src/lib/pad-content.js')
 
-
-
 const setupEmbedDom = () => {
 	document.body.innerHTML = `
 		<div id="etherpad-nextcloud-embed"
@@ -53,14 +52,6 @@ const setupEmbedDom = () => {
 	`
 }
 
-const jsonResponse = (body, ok = true, status = 200) => ({
-	ok,
-	status,
-	json: () => Promise.resolve(body),
-})
-
-const errorResponse = (body, status = 400) => jsonResponse(body, false, status)
-
 const root = () => document.getElementById('etherpad-nextcloud-embed')
 const errorMessage = () => document.querySelector('[data-epnc-embed-error-message]').textContent
 const errorActions = () => document.querySelector('[data-epnc-embed-error-actions]')
diff --git a/tests/js/lib/api-client.test.js b/tests/js/lib/api-client.test.js
index 738628e6..122436d4 100644
--- a/tests/js/lib/api-client.test.js
+++ b/tests/js/lib/api-client.test.js
@@ -6,6 +6,7 @@
 /** Covers request encoding, caching, invalidation, timeout, and error contracts. */
 
 import { afterEach, beforeEach, describe, expect, it, vi } from 'vitest'
+import { jsonResponse, pageResponse } from '../responses.js'
 
 const importClient = async () => {
 	vi.resetModules()
@@ -26,11 +27,6 @@ afterEach(() => {
 	delete globalThis.fetch
 })
 
-const jsonResponse = (body, ok = true) => ({
-	ok,
-	json: () => Promise.resolve(body),
-})
-
 describe('api-client', () => {
 	it('resolves pads by encoded file path', async () => {
 		const { apiResolvePadByPath } = await importClient()
@@ -143,10 +139,7 @@ describe('api-client', () => {
 
 	it('uses fallback messages for non-json errors', async () => {
 		const { apiRecoverFromSnapshot } = await importClient()
-		fetch.mockResolvedValueOnce({
-			ok: false,
-			json: () => Promise.reject(new SyntaxError('Unexpected token < in JSON')),
-		})
+		fetch.mockResolvedValueOnce(pageResponse(400))
 
 		await expect(apiRecoverFromSnapshot(10)).rejects.toThrow('Recovery failed.')
 	})
diff --git a/tests/js/lib/fetch-helpers.test.js b/tests/js/lib/fetch-helpers.test.js
index 77c1f303..7c1131d4 100644
--- a/tests/js/lib/fetch-helpers.test.js
+++ b/tests/js/lib/fetch-helpers.test.js
@@ -3,19 +3,15 @@
  * Copyright (c) 2026 Jacob Bühler
  */
 import { afterEach, describe, expect, it, vi } from 'vitest'
-import { fetchJsonWithTimeout, requestErrorMessage } from '../../../src/lib/fetch-helpers.js'
+import { fetchJsonWithTimeout, isUnanswered, requestErrorMessage } from '../../../src/lib/fetch-helpers.js'
 import { MISSING_BINDING, UNREACHABLE } from '../answers.js'
+import { brokenBody, jsonResponse, pageResponse } from '../responses.js'
 
 /**
  * The signal chaining is the subtlest part of this module and it now
  * carries both frontends: the viewer aborts a superseded open, the embed
  * relies on the timeout, and both go through here.
  */
-const jsonResponse = (body, ok = true, status = 200) => ({
-	ok,
-	status,
-	json: () => Promise.resolve(body),
-})
 
 const stubFetch = (impl) => {
 	const mock = typeof impl === 'function' ? vi.fn(impl) : vi.fn().mockResolvedValue(impl)
@@ -25,13 +21,6 @@ const stubFetch = (impl) => {
 
 const abortError = () => new DOMException('The operation was aborted.', 'AbortError')
 
-/** An answer whose body is not JSON: a proxy's or Nextcloud's own page. */
-const pageResponse = (status) => ({
-	ok: status < 400,
-	status,
-	json: () => Promise.reject(new SyntaxError('Unexpected token < in JSON at position 0')),
-})
-
 afterEach(() => {
 	vi.unstubAllGlobals()
 	vi.useRealTimers()
@@ -102,6 +91,8 @@ describe('fetchJsonWithTimeout', () => {
 
 		expect(error).toMatchObject({ name: 'TypeError', unanswered: true })
 		expect(error.retryable).toBeUndefined()
+		// Nothing came, so there is no status to give.
+		expect(error.status).toBeUndefined()
 	})
 
 	// The headers came, the body did not: still no answer, not an empty one.
@@ -118,13 +109,14 @@ describe('fetchJsonWithTimeout', () => {
 		const error = fetchJsonWithTimeout('/x').catch((e) => e)
 		await vi.advanceTimersByTimeAsync(11_000)
 
-		expect(await error).toMatchObject({ message: 'Request timed out.', unanswered: true })
+		// The status came before the body broke off, and goes along.
+		expect(await error).toMatchObject({ message: 'Request timed out.', unanswered: true, status: 200 })
 	})
 
-	it('takes a network failure while the body streams in for no answer', async () => {
-		stubFetch({ ok: false, status: 503, json: () => Promise.reject(new TypeError('network error')) })
+	it('takes a network failure while the body streams in for no answer, with the status that came', async () => {
+		stubFetch(brokenBody(409))
 
-		await expect(fetchJsonWithTimeout('/x')).rejects.toMatchObject({ name: 'TypeError', unanswered: true })
+		await expect(fetchJsonWithTimeout('/x')).rejects.toMatchObject({ name: 'TypeError', unanswered: true, status: 409 })
 	})
 
 	it('reads a body that is not JSON as an empty one', async () => {
@@ -133,9 +125,7 @@ describe('fetchJsonWithTimeout', () => {
 		await expect(fetchJsonWithTimeout('/x')).resolves.toEqual({})
 	})
 
-	// This app never answers 502 or 504, and its every 503 is retryable. A
-	// gateway in its place is no answer from it, whatever it sends - its
-	// JSON may carry a message too; a server error of any other kind is one.
+	// The rule in docs/architecture.md ("Errors of the API"), row by row.
 	it.each([
 		['a proxy whose backend is gone', pageResponse(502), true],
 		['Nextcloud in maintenance', pageResponse(503), true],
@@ -146,7 +136,10 @@ describe('fetchJsonWithTimeout', () => {
 		['a load balancer out of peers', jsonResponse({ message: 'failure to get a peer from the ring-balancer' }, false, 503), true],
 		['a gateway answering JSON null', jsonResponse(null, false, 503), true],
 		['this app, not reachable further on', jsonResponse(UNREACHABLE, false, 503), undefined],
-		['a server error page', pageResponse(500), undefined],
+		['PHP dying midway', pageResponse(500), true],
+		['a proxy that gave up on a slow origin', pageResponse(524), true],
+		['this app failing', jsonResponse({ message: 'Request failed.' }, false, 500), undefined],
+		['a proxy refusing a body too large', pageResponse(413), undefined],
 	])('tells whether %s answered', async (_, response, unanswered) => {
 		stubFetch(response)
 
@@ -241,3 +234,14 @@ describe('requestErrorMessage', () => {
 		expect(requestErrorMessage(error, 'No answer.', 'Failed.')).toBe(expected)
 	})
 })
+
+describe('isUnanswered', () => {
+	it.each([
+		['nothing came back', Object.assign(new Error('Request timed out.'), { unanswered: true }), true],
+		['this app answered', Object.assign(new Error('no binding'), { status: 400 }), false],
+		['the flag is not quite true', Object.assign(new Error('x'), { unanswered: 'yes' }), false],
+		['there is no error', null, false],
+	])('when %s', (_, error, expected) => {
+		expect(isUnanswered(error)).toBe(expected)
+	})
+})
diff --git a/tests/js/lib/pad-content.test.js b/tests/js/lib/pad-content.test.js
index 0b653170..89e2b3d1 100644
--- a/tests/js/lib/pad-content.test.js
+++ b/tests/js/lib/pad-content.test.js
@@ -7,12 +7,7 @@
  */
 import { beforeEach, describe, expect, it, vi } from 'vitest'
 import { loadPadContent } from '../../../src/lib/pad-content.js'
-
-const jsonResponse = (body, ok = true, status = 200) => ({
-	ok,
-	status,
-	json: () => Promise.resolve(body),
-})
+import { jsonResponse } from '../responses.js'
 
 describe('loadPadContent', () => {
 	beforeEach(() => {
diff --git a/tests/js/responses.js b/tests/js/responses.js
new file mode 100644
index 00000000..54b7eef8
--- /dev/null
+++ b/tests/js/responses.js
@@ -0,0 +1,30 @@
+/**
+ * SPDX-License-Identifier: AGPL-3.0-or-later
+ * Copyright (c) 2026 Jacob Bühler
+ */
+
+/**
+ * What a stubbed fetch() resolves with, so each shape of answer is written
+ * once.
+ */
+export const jsonResponse = (body, ok = true, status = 200) => ({
+	ok,
+	status,
+	json: () => Promise.resolve(body),
+})
+
+export const errorResponse = (body, status = 400) => jsonResponse(body, false, status)
+
+/** A page in place of this app's JSON: a proxy's, a maintenance page, PHP's own. */
+export const pageResponse = (status) => ({
+	ok: status < 400,
+	status,
+	json: () => Promise.reject(new SyntaxError('Unexpected token < in JSON at position 0')),
+})
+
+/** An answer whose body broke off after its status line. */
+export const brokenBody = (status) => ({
+	ok: status < 400,
+	status,
+	json: () => Promise.reject(new TypeError('network error')),
+})
diff --git a/tests/js/viewer-main.test.js b/tests/js/viewer-main.test.js
index a5866cd5..e78e6274 100644
--- a/tests/js/viewer-main.test.js
+++ b/tests/js/viewer-main.test.js
@@ -14,6 +14,7 @@
 import { afterEach, beforeAll, beforeEach, describe, expect, it, vi } from 'vitest'
 import { flushAsyncWork } from './flush.js'
 import { FILE_CHANGED, LOCKED, LOST_RACE, MISSING_BINDING, MISSING_FRONTMATTER, UNANSWERED_TEXT, UNREACHABLE, WAITING } from './answers.js'
+import { jsonResponse } from './responses.js'
 
 vi.mock('../../src/lib/oc-compat.js', () => ({
 	ocGenerateUrl: (path) => path,
@@ -94,12 +95,6 @@ function makeInstance(overrides = {}) {
 	return ctx
 }
 
-const jsonResponse = (body, ok = true, status = 200) => ({
-	ok,
-	status,
-	json: () => Promise.resolve(body),
-})
-
 // Endpoint prefixes overlap, so compare their full paths.
 const endpoint = (name) => `/apps/etherpad_nextcloud/api/v1/${name}`
 const bodyOf = (call) => String(call?.[1]?.body || '')
diff --git a/tests/phpunit/unit/EmbedControllerTest.php b/tests/phpunit/unit/EmbedControllerTest.php
index 523797c2..184f8d06 100644
--- a/tests/phpunit/unit/EmbedControllerTest.php
+++ b/tests/phpunit/unit/EmbedControllerTest.php
@@ -47,6 +47,8 @@ public function testShowByIdUsesInjectedCsrfTokenAndTrustedOriginsInTemplateData
 			$params['open_by_id_url'],
 			$params['initialize_by_id_url_template'],
 		]);
+		// The page's own sentence for a request nothing came back for.
+		$this->assertSame('Nextcloud did not answer. Check your connection and try again.', $params['l10n']['unanswered']);
 	}
 
 	public function testShowByIdReturnsNoviewerOnInvalidFileId(): void {
@@ -162,6 +164,9 @@ public function testCreateByParentBuildsEmbedCreateTemplate(): void {
 		$this->assertSame('embed-create', $response->getTemplateName());
 		$this->assertSame(99, $params['parent_folder_id']);
 		$this->assertSame('csrf-token-value', $params['requesttoken']);
+		// No answer to a create leaves its outcome open, and the page says so.
+		$this->assertSame('Nextcloud did not answer. The pad may have been created anyway; look in the folder before you try again.', $params['l10n']['unanswered']);
+		$this->assertSame('Pad creation failed.', $params['l10n']['failed']);
 	}
 
 	private function buildController(UserNodeResolver $userNodeResolver, bool $anonymous = false): EmbedController {