From 6750f5f64385a1d918a2ee07deb4f34c801e29d6 Mon Sep 17 00:00:00 2001
From: xiaoxiaojx <784487301@qq.com>
Date: Sun, 3 May 2026 17:18:57 +0800
Subject: [PATCH 1/6] fix: recognize win32 relative paths in getType and
 isRelativeRequest

On Windows, path.relative() returns backslash-separated paths like
"..\src". These were classified as Normal (bare specifier) instead of
Relative, causing the resolver to look in node_modules instead of
resolving relative to the context directory.

- getType: treat .\ and ..\ the same as ./ and ../
- normalize: convert backslashes to forward slashes for Relative paths
- isRelativeRequest: recognize .\ and ..\ as relative

Fixes #401
---
 lib/util/path.js  | 16 +++++++---
 test/path.test.js | 74 +++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 86 insertions(+), 4 deletions(-)

diff --git a/lib/util/path.js b/lib/util/path.js
index 707b6144..36334ba6 100644
--- a/lib/util/path.js
+++ b/lib/util/path.js
@@ -81,6 +81,7 @@ const getType = (maybePath) => {
 					switch (c1) {
 						case CHAR_DOT:
 						case CHAR_SLASH:
+						case CHAR_BACKSLASH:
 							return PathType.Relative;
 					}
 					return PathType.Normal;
@@ -107,10 +108,13 @@ const getType = (maybePath) => {
 			const c1 = maybePath.charCodeAt(1);
 			switch (c1) {
 				case CHAR_SLASH:
+				case CHAR_BACKSLASH:
 					return PathType.Relative;
 				case CHAR_DOT: {
 					const c2 = maybePath.charCodeAt(2);
-					if (c2 === CHAR_SLASH) return PathType.Relative;
+					if (c2 === CHAR_SLASH || c2 === CHAR_BACKSLASH) {
+						return PathType.Relative;
+					}
 					return PathType.Normal;
 				}
 			}
@@ -153,7 +157,10 @@ const normalize = (maybePath) => {
 		case PathType.AbsoluteWin:
 			return winNormalize(maybePath);
 		case PathType.Relative: {
-			const r = posixNormalize(maybePath);
+			const posixPath = maybePath.includes("\\")
+				? maybePath.replace(/\\/g, "/")
+				: maybePath;
+			const r = posixNormalize(posixPath);
 			return getType(r) === PathType.Relative ? r : `./${r}`;
 		}
 	}
@@ -290,10 +297,11 @@ const isRelativeRequest = (request) => {
 	if (len === 0 || request.charCodeAt(0) !== CHAR_DOT) return false;
 	if (len === 1) return true; // "."
 	const c1 = request.charCodeAt(1);
-	if (c1 === CHAR_SLASH) return true; // "./..."
+	if (c1 === CHAR_SLASH || c1 === CHAR_BACKSLASH) return true; // "./..." or ".\\..."
 	if (c1 !== CHAR_DOT) return false; // ".x..."
 	if (len === 2) return true; // ".."
-	return request.charCodeAt(2) === CHAR_SLASH; // "../..."
+	const c2 = request.charCodeAt(2);
+	return c2 === CHAR_SLASH || c2 === CHAR_BACKSLASH; // "../..." or "..\\..."
 };
 
 /**
diff --git a/test/path.test.js b/test/path.test.js
index 9bcab677..9b419643 100644
--- a/test/path.test.js
+++ b/test/path.test.js
@@ -1,5 +1,7 @@
 "use strict";
 
+const path = require("path");
+
 const {
 	PathType,
 	createCachedBasename,
@@ -27,6 +29,10 @@ describe("util/path getType", () => {
 		expect(getType("a")).toBe(PathType.Normal);
 	});
 
+	it("classifies win32 relative two-character inputs", () => {
+		expect(getType(".\\")).toBe(PathType.Relative);
+	});
+
 	it("classifies two-character inputs", () => {
 		expect(getType("..")).toBe(PathType.Relative);
 		expect(getType("./")).toBe(PathType.Relative);
@@ -39,6 +45,12 @@ describe("util/path getType", () => {
 		expect(getType("1:")).toBe(PathType.Normal);
 	});
 
+	it("classifies win32 relative longer inputs", () => {
+		expect(getType(".\\a")).toBe(PathType.Relative);
+		expect(getType("..\\a")).toBe(PathType.Relative);
+		expect(getType("..\\..\\src")).toBe(PathType.Relative);
+	});
+
 	it("classifies longer inputs", () => {
 		expect(getType("./a")).toBe(PathType.Relative);
 		expect(getType("../a")).toBe(PathType.Relative);
@@ -99,6 +111,12 @@ describe("util/path normalize", () => {
 		expect(normalize("./a/../b")).toBe("./b");
 	});
 
+	it("normalizes win32 relative paths to posix", () => {
+		expect(normalize(".\\a\\b")).toBe("./a/b");
+		expect(normalize("..\\a")).toBe("../a");
+		expect(normalize("..\\..\\src\\shared")).toBe("../../src/shared");
+	});
+
 	it("normalizes posix absolute paths", () => {
 		expect(normalize("/a/b/../c")).toBe("/a/c");
 	});
@@ -140,6 +158,11 @@ describe("util/path join", () => {
 		expect(join("C:\\a", "b")).toBe("C:\\a\\b");
 	});
 
+	it("joins win32 relative requests onto win32 roots", () => {
+		expect(join("C:\\project\\app", "..\\..\\src")).toBe("C:\\src");
+		expect(join("C:\\project", ".\\src")).toBe("C:\\project\\src");
+	});
+
 	it("joins DOS device paths with win32 semantics", () => {
 		expect(join("\\\\?\\C:\\a", "b")).toBe("\\\\?\\C:\\a\\b");
 		expect(join("\\\\.\\C:\\a", "b")).toBe("\\\\.\\C:\\a\\b");
@@ -254,6 +277,14 @@ describe("util/path isRelativeRequest", () => {
 		expect(isRelativeRequest("../foo")).toBe(true);
 	});
 
+	it("returns true for win32 relative requests", () => {
+		expect(isRelativeRequest(".\\")).toBe(true);
+		expect(isRelativeRequest(".\\foo")).toBe(true);
+		expect(isRelativeRequest("..\\")).toBe(true);
+		expect(isRelativeRequest("..\\foo")).toBe(true);
+		expect(isRelativeRequest("..\\..\\src")).toBe(true);
+	});
+
 	it("returns false for bare specifiers and absolute paths", () => {
 		expect(isRelativeRequest("")).toBe(false);
 		expect(isRelativeRequest("foo")).toBe(false);
@@ -352,3 +383,46 @@ describe("util/path join fallbacks for special rootPath types", () => {
 		expect(join("#x", "./foo")).toBe("./#x");
 	});
 });
+
+describe("util/path win32 relative paths from path.relative()", () => {
+	const isWin32 = process.platform === "win32";
+
+	if (isWin32) {
+		it("should produce backslash paths from path.relative() on win32", () => {
+			const rel = path.relative("C:\\project\\app", "C:\\project\\src");
+			expect(rel).toContain("\\");
+			expect(getType(rel)).toBe(PathType.Relative);
+			expect(isRelativeRequest(rel)).toBe(true);
+			expect(normalize(rel)).toBe("../src");
+		});
+
+		it("should handle multi-level win32 relative paths", () => {
+			const rel = path.relative(
+				"C:\\project\\packages\\app",
+				"C:\\project\\src\\shared",
+			);
+			expect(rel).toContain("\\");
+			expect(getType(rel)).toBe(PathType.Relative);
+			expect(normalize(rel)).toBe("../../src/shared");
+		});
+	} else {
+		it("should handle win32-style paths on any platform", () => {
+			// Use path.win32.relative() to simulate Windows behavior on non-Windows
+			const rel = path.win32.relative("C:\\project\\app", "C:\\project\\src");
+			expect(rel).toBe("..\\src");
+			expect(getType(rel)).toBe(PathType.Relative);
+			expect(isRelativeRequest(rel)).toBe(true);
+			expect(normalize(rel)).toBe("../src");
+		});
+
+		it("should handle multi-level win32 relative paths on any platform", () => {
+			const rel = path.win32.relative(
+				"C:\\project\\packages\\app",
+				"C:\\project\\src\\shared",
+			);
+			expect(rel).toBe("..\\..\\src\\shared");
+			expect(getType(rel)).toBe(PathType.Relative);
+			expect(normalize(rel)).toBe("../../src/shared");
+		});
+	}
+});

From 5520c4cc5042a565a9d2ae3779bd3d263f64cb58 Mon Sep 17 00:00:00 2001
From: xiaoxiaojx <784487301@qq.com>
Date: Sun, 3 May 2026 17:19:13 +0800
Subject: [PATCH 2/6] chore: add changeset for win32 relative paths fix

---
 .changeset/fix-win32-relative-paths.md | 5 +++++
 1 file changed, 5 insertions(+)
 create mode 100644 .changeset/fix-win32-relative-paths.md

diff --git a/.changeset/fix-win32-relative-paths.md b/.changeset/fix-win32-relative-paths.md
new file mode 100644
index 00000000..68a8df77
--- /dev/null
+++ b/.changeset/fix-win32-relative-paths.md
@@ -0,0 +1,5 @@
+---
+"enhanced-resolve": patch
+---
+
+Recognize win32 relative paths (e.g. `..\src`) in `getType` and `isRelativeRequest`. On Windows, `path.relative()` returns backslash-separated paths that were previously misclassified as bare specifiers, causing resolution to fail. Backslashes in relative paths are now normalized to forward slashes internally.

From b84e5bb2766fc78b0db6bff9066f7e30c6e4755c Mon Sep 17 00:00:00 2001
From: xiaoxiaojx <784487301@qq.com>
Date: Sun, 3 May 2026 17:42:16 +0800
Subject: [PATCH 3/6] fix: add resolver integration test for win32 relative
 paths

Also fix join() to convert backslashes in request when rootPath is
non-AbsoluteWin, so posixNormalize can correctly resolve ".." segments.
---
 lib/util/path.js            |  8 +++--
 test/win32-relative.test.js | 60 +++++++++++++++++++++++++++++++++++++
 2 files changed, 66 insertions(+), 2 deletions(-)
 create mode 100644 test/win32-relative.test.js

diff --git a/lib/util/path.js b/lib/util/path.js
index 36334ba6..99256ade 100644
--- a/lib/util/path.js
+++ b/lib/util/path.js
@@ -184,8 +184,12 @@ const join = (rootPath, request) => {
 	switch (getType(rootPath)) {
 		case PathType.Normal:
 		case PathType.Relative:
-		case PathType.AbsolutePosix:
-			return posixNormalize(`${rootPath}/${request}`);
+		case PathType.AbsolutePosix: {
+			const req = request.includes("\\")
+				? request.replace(/\\/g, "/")
+				: request;
+			return posixNormalize(`${rootPath}/${req}`);
+		}
 		case PathType.AbsoluteWin:
 			return winNormalize(`${rootPath}\\${request}`);
 	}
diff --git a/test/win32-relative.test.js b/test/win32-relative.test.js
new file mode 100644
index 00000000..cd865af2
--- /dev/null
+++ b/test/win32-relative.test.js
@@ -0,0 +1,60 @@
+"use strict";
+
+const path = require("path");
+const resolve = require("../");
+
+const fixtures = path.join(__dirname, "fixtures");
+
+describe("win32 relative path resolution", () => {
+	it("should resolve a win32 relative request with backslashes", (done) => {
+		// Simulate the issue: on Windows, path.relative() returns "..\b.js"
+		// instead of "../b.js". The resolver should handle both.
+		const context = path.join(fixtures, "extensions");
+		resolve(context, "..\\b.js", (err, result) => {
+			if (err) return done(err);
+			expect(result).toBe(path.join(fixtures, "b.js"));
+			done();
+		});
+	});
+
+	it("should resolve a win32 relative request with backslashes (sync)", () => {
+		const context = path.join(fixtures, "extensions");
+		const result = resolve.sync(context, "..\\b.js");
+		expect(result).toBe(path.join(fixtures, "b.js"));
+	});
+
+	it("should resolve multi-level win32 relative paths", (done) => {
+		const context = path.join(fixtures, "extensions", "foo");
+		resolve(context, "..\\..\\a.js", (err, result) => {
+			if (err) return done(err);
+			expect(result).toBe(path.join(fixtures, "a.js"));
+			done();
+		});
+	});
+
+	it("should resolve win32 relative directory requests", (done) => {
+		const context = path.join(fixtures, "extensions");
+		resolve(context, ".\\foo", (err, result) => {
+			if (err) return done(err);
+			expect(result).toBe(path.join(fixtures, "extensions", "foo.js"));
+			done();
+		});
+	});
+
+	if (process.platform === "win32") {
+		it("should resolve real path.relative() output on Windows", (done) => {
+			const from = path.join(fixtures, "extensions");
+			const to = path.join(fixtures, "b.js");
+			const rel = path.relative(from, to);
+
+			// On Windows, path.relative() produces backslash paths
+			expect(rel).toContain("\\");
+
+			resolve(from, rel, (err, result) => {
+				if (err) return done(err);
+				expect(result).toBe(to);
+				done();
+			});
+		});
+	}
+});

From 53bb3c1dc3625df791c9f0b28930ac8c41c87548 Mon Sep 17 00:00:00 2001
From: xiaoxiaojx <784487301@qq.com>
Date: Sun, 3 May 2026 17:43:30 +0800
Subject: [PATCH 4/6] refactor: extract toPosixSep helper for backslash
 conversion

---
 lib/util/path.js | 22 ++++++++++++----------
 1 file changed, 12 insertions(+), 10 deletions(-)

diff --git a/lib/util/path.js b/lib/util/path.js
index 99256ade..3cd971a3 100644
--- a/lib/util/path.js
+++ b/lib/util/path.js
@@ -21,6 +21,15 @@ const CHAR_QUESTION = "?".charCodeAt(0);
 const posixNormalize = path.posix.normalize;
 const winNormalize = path.win32.normalize;
 
+const BACKSLASH_RE = /\\/g;
+
+/**
+ * @param {string} str path that may contain backslashes
+ * @returns {string} path with backslashes replaced by forward slashes
+ */
+const toPosixSep = (str) =>
+	str.includes("\\") ? str.replace(BACKSLASH_RE, "/") : str;
+
 /**
  * @enum {number}
  */
@@ -157,10 +166,7 @@ const normalize = (maybePath) => {
 		case PathType.AbsoluteWin:
 			return winNormalize(maybePath);
 		case PathType.Relative: {
-			const posixPath = maybePath.includes("\\")
-				? maybePath.replace(/\\/g, "/")
-				: maybePath;
-			const r = posixNormalize(posixPath);
+			const r = posixNormalize(toPosixSep(maybePath));
 			return getType(r) === PathType.Relative ? r : `./${r}`;
 		}
 	}
@@ -184,12 +190,8 @@ const join = (rootPath, request) => {
 	switch (getType(rootPath)) {
 		case PathType.Normal:
 		case PathType.Relative:
-		case PathType.AbsolutePosix: {
-			const req = request.includes("\\")
-				? request.replace(/\\/g, "/")
-				: request;
-			return posixNormalize(`${rootPath}/${req}`);
-		}
+		case PathType.AbsolutePosix:
+			return posixNormalize(`${rootPath}/${toPosixSep(request)}`);
 		case PathType.AbsoluteWin:
 			return winNormalize(`${rootPath}\\${request}`);
 	}

From b8f1b83b638bf2aac394cc2b8e6133866e9aca8c Mon Sep 17 00:00:00 2001
From: xiaoxiaojx <784487301@qq.com>
Date: Sun, 3 May 2026 18:17:13 +0800
Subject: [PATCH 5/6] fix: update

---
 .cspell.json                           |   2 +
 package-lock.json                      | 623 ++++++++++++++++++++++++-
 package.json                           |   4 +-
 test/win32-relative-comparison.test.js |  73 +++
 4 files changed, 699 insertions(+), 3 deletions(-)
 create mode 100644 test/win32-relative-comparison.test.js

diff --git a/.cspell.json b/.cspell.json
index df562c03..e3bfa0db 100644
--- a/.cspell.json
+++ b/.cspell.json
@@ -48,6 +48,8 @@
     "Sindre",
     "Sorhus",
     "readlink",
+    "rspack",
+    "Rspack",
     "extensionless",
     "ENOENT"
   ],
diff --git a/package-lock.json b/package-lock.json
index 71ea2fcd..917a1cb1 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "enhanced-resolve",
-  "version": "5.20.1",
+  "version": "5.21.0",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "enhanced-resolve",
-      "version": "5.20.1",
+      "version": "5.21.0",
       "license": "MIT",
       "dependencies": {
         "graceful-fs": "^4.2.4",
@@ -26,8 +26,10 @@
         "jest": "^30.3.0",
         "lint-staged": "^16.2.7",
         "memfs": "^4.56.11",
+        "oxc-resolver": "^11.19.1",
         "prettier": "^3.7.4",
         "prettier-2": "npm:prettier@^2",
+        "rspack-resolver": "^1.3.0",
         "tinybench": "^6.0.0",
         "tooling": "webpack/tooling#v1.26.1",
         "typescript": "^6.0.2"
@@ -3392,6 +3394,332 @@
         "node": ">= 8"
       }
     },
+    "node_modules/@oxc-resolver/binding-android-arm-eabi": {
+      "version": "11.19.1",
+      "resolved": "https://registry.npmjs.org/@oxc-resolver/binding-android-arm-eabi/-/binding-android-arm-eabi-11.19.1.tgz",
+      "integrity": "sha512-aUs47y+xyXHUKlbhqHUjBABjvycq6YSD7bpxSW7vplUmdzAlJ93yXY6ZR0c1o1x5A/QKbENCvs3+NlY8IpIVzg==",
+      "cpu": [
+        "arm"
+      ],
+      "dev": true,
+      "license": "MIT",
+      "optional": true,
+      "os": [
+        "android"
+      ]
+    },
+    "node_modules/@oxc-resolver/binding-android-arm64": {
+      "version": "11.19.1",
+      "resolved": "https://registry.npmjs.org/@oxc-resolver/binding-android-arm64/-/binding-android-arm64-11.19.1.tgz",
+      "integrity": "sha512-oolbkRX+m7Pq2LNjr/kKgYeC7bRDMVTWPgxBGMjSpZi/+UskVo4jsMU3MLheZV55jL6c3rNelPl4oD60ggYmqA==",
+      "cpu": [
+        "arm64"
+      ],
+      "dev": true,
+      "license": "MIT",
+      "optional": true,
+      "os": [
+        "android"
+      ]
+    },
+    "node_modules/@oxc-resolver/binding-darwin-arm64": {
+      "version": "11.19.1",
+      "resolved": "https://registry.npmjs.org/@oxc-resolver/binding-darwin-arm64/-/binding-darwin-arm64-11.19.1.tgz",
+      "integrity": "sha512-nUC6d2i3R5B12sUW4O646qD5cnMXf2oBGPLIIeaRfU9doJRORAbE2SGv4eW6rMqhD+G7nf2Y8TTJTLiiO3Q/dQ==",
+      "cpu": [
+        "arm64"
+      ],
+      "dev": true,
+      "license": "MIT",
+      "optional": true,
+      "os": [
+        "darwin"
+      ]
+    },
+    "node_modules/@oxc-resolver/binding-darwin-x64": {
+      "version": "11.19.1",
+      "resolved": "https://registry.npmjs.org/@oxc-resolver/binding-darwin-x64/-/binding-darwin-x64-11.19.1.tgz",
+      "integrity": "sha512-cV50vE5+uAgNcFa3QY1JOeKDSkM/9ReIcc/9wn4TavhW/itkDGrXhw9jaKnkQnGbjJ198Yh5nbX/Gr2mr4Z5jQ==",
+      "cpu": [
+        "x64"
+      ],
+      "dev": true,
+      "license": "MIT",
+      "optional": true,
+      "os": [
+        "darwin"
+      ]
+    },
+    "node_modules/@oxc-resolver/binding-freebsd-x64": {
+      "version": "11.19.1",
+      "resolved": "https://registry.npmjs.org/@oxc-resolver/binding-freebsd-x64/-/binding-freebsd-x64-11.19.1.tgz",
+      "integrity": "sha512-xZOQiYGFxtk48PBKff+Zwoym7ScPAIVp4c14lfLxizO2LTTTJe5sx9vQNGrBymrf/vatSPNMD4FgsaaRigPkqw==",
+      "cpu": [
+        "x64"
+      ],
+      "dev": true,
+      "license": "MIT",
+      "optional": true,
+      "os": [
+        "freebsd"
+      ]
+    },
+    "node_modules/@oxc-resolver/binding-linux-arm-gnueabihf": {
+      "version": "11.19.1",
+      "resolved": "https://registry.npmjs.org/@oxc-resolver/binding-linux-arm-gnueabihf/-/binding-linux-arm-gnueabihf-11.19.1.tgz",
+      "integrity": "sha512-lXZYWAC6kaGe/ky2su94e9jN9t6M0/6c+GrSlCqL//XO1cxi5lpAhnJYdyrKfm0ZEr/c7RNyAx3P7FSBcBd5+A==",
+      "cpu": [
+        "arm"
+      ],
+      "dev": true,
+      "license": "MIT",
+      "optional": true,
+      "os": [
+        "linux"
+      ]
+    },
+    "node_modules/@oxc-resolver/binding-linux-arm-musleabihf": {
+      "version": "11.19.1",
+      "resolved": "https://registry.npmjs.org/@oxc-resolver/binding-linux-arm-musleabihf/-/binding-linux-arm-musleabihf-11.19.1.tgz",
+      "integrity": "sha512-veG1kKsuK5+t2IsO9q0DErYVSw2azvCVvWHnfTOS73WE0STdLLB7Q1bB9WR+yHPQM76ASkFyRbogWo1GR1+WbQ==",
+      "cpu": [
+        "arm"
+      ],
+      "dev": true,
+      "license": "MIT",
+      "optional": true,
+      "os": [
+        "linux"
+      ]
+    },
+    "node_modules/@oxc-resolver/binding-linux-arm64-gnu": {
+      "version": "11.19.1",
+      "resolved": "https://registry.npmjs.org/@oxc-resolver/binding-linux-arm64-gnu/-/binding-linux-arm64-gnu-11.19.1.tgz",
+      "integrity": "sha512-heV2+jmXyYnUrpUXSPugqWDRpnsQcDm2AX4wzTuvgdlZfoNYO0O3W2AVpJYaDn9AG4JdM6Kxom8+foE7/BcSig==",
+      "cpu": [
+        "arm64"
+      ],
+      "dev": true,
+      "libc": [
+        "glibc"
+      ],
+      "license": "MIT",
+      "optional": true,
+      "os": [
+        "linux"
+      ]
+    },
+    "node_modules/@oxc-resolver/binding-linux-arm64-musl": {
+      "version": "11.19.1",
+      "resolved": "https://registry.npmjs.org/@oxc-resolver/binding-linux-arm64-musl/-/binding-linux-arm64-musl-11.19.1.tgz",
+      "integrity": "sha512-jvo2Pjs1c9KPxMuMPIeQsgu0mOJF9rEb3y3TdpsrqwxRM+AN6/nDDwv45n5ZrUnQMsdBy5gIabioMKnQfWo9ew==",
+      "cpu": [
+        "arm64"
+      ],
+      "dev": true,
+      "libc": [
+        "musl"
+      ],
+      "license": "MIT",
+      "optional": true,
+      "os": [
+        "linux"
+      ]
+    },
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+        "@oxc-resolver/binding-win32-arm64-msvc": "11.19.1",
+        "@oxc-resolver/binding-win32-ia32-msvc": "11.19.1",
+        "@oxc-resolver/binding-win32-x64-msvc": "11.19.1"
+      }
+    },
     "node_modules/p-filter": {
       "version": "2.1.0",
       "resolved": "https://registry.npmjs.org/p-filter/-/p-filter-2.1.0.tgz",
@@ -12549,6 +13140,34 @@
       "dev": true,
       "license": "MIT"
     },
+    "node_modules/rspack-resolver": {
+      "version": "1.3.0",
+      "resolved": "https://registry.npmjs.org/rspack-resolver/-/rspack-resolver-1.3.0.tgz",
+      "integrity": "sha512-az/PLDwa1xijNv4bAFBS8mtqqJC1Y3lVyFag4cuyIUOHq/ft5kSZlHbqYaLZLpsQtPWv4ZGDo5ycySKJzUvU/A==",
+      "deprecated": "Please migrate to the brand new `@rspack/resolver` or `unrs-resolver` instead",
+      "dev": true,
+      "license": "MIT",
+      "funding": {
+        "url": "https://github.com/sponsors/JounQin"
+      },
+      "optionalDependencies": {
+        "@unrs/rspack-resolver-binding-darwin-arm64": "1.3.0",
+        "@unrs/rspack-resolver-binding-darwin-x64": "1.3.0",
+        "@unrs/rspack-resolver-binding-freebsd-x64": "1.3.0",
+        "@unrs/rspack-resolver-binding-linux-arm-gnueabihf": "1.3.0",
+        "@unrs/rspack-resolver-binding-linux-arm-musleabihf": "1.3.0",
+        "@unrs/rspack-resolver-binding-linux-arm64-gnu": "1.3.0",
+        "@unrs/rspack-resolver-binding-linux-arm64-musl": "1.3.0",
+        "@unrs/rspack-resolver-binding-linux-ppc64-gnu": "1.3.0",
+        "@unrs/rspack-resolver-binding-linux-s390x-gnu": "1.3.0",
+        "@unrs/rspack-resolver-binding-linux-x64-gnu": "1.3.0",
+        "@unrs/rspack-resolver-binding-linux-x64-musl": "1.3.0",
+        "@unrs/rspack-resolver-binding-wasm32-wasi": "1.3.0",
+        "@unrs/rspack-resolver-binding-win32-arm64-msvc": "1.3.0",
+        "@unrs/rspack-resolver-binding-win32-ia32-msvc": "1.3.0",
+        "@unrs/rspack-resolver-binding-win32-x64-msvc": "1.3.0"
+      }
+    },
     "node_modules/run-parallel": {
       "version": "1.2.0",
       "resolved": "https://registry.npmjs.org/run-parallel/-/run-parallel-1.2.0.tgz",
diff --git a/package.json b/package.json
index f6c80ee6..57f3942e 100644
--- a/package.json
+++ b/package.json
@@ -71,10 +71,12 @@
     "jest": "^30.3.0",
     "lint-staged": "^16.2.7",
     "memfs": "^4.56.11",
+    "oxc-resolver": "^11.19.1",
     "prettier": "^3.7.4",
     "prettier-2": "npm:prettier@^2",
-    "tooling": "webpack/tooling#v1.26.1",
+    "rspack-resolver": "^1.3.0",
     "tinybench": "^6.0.0",
+    "tooling": "webpack/tooling#v1.26.1",
     "typescript": "^6.0.2"
   },
   "engines": {
diff --git a/test/win32-relative-comparison.test.js b/test/win32-relative-comparison.test.js
new file mode 100644
index 00000000..69761c6c
--- /dev/null
+++ b/test/win32-relative-comparison.test.js
@@ -0,0 +1,73 @@
+"use strict";
+
+const path = require("path");
+const { ResolverFactory: OxcResolverFactory } = require("oxc-resolver");
+const { ResolverFactory: RspackResolverFactory } = require("rspack-resolver");
+const resolve = require("../");
+
+const fixtures = path.join(__dirname, "fixtures");
+const context = path.join(fixtures, "extensions");
+
+// Posix relative paths (control group — should always pass)
+const posixCases = [
+	["../a.js", path.join(fixtures, "a.js")],
+	["./foo", path.join(fixtures, "extensions", "foo.js")],
+];
+
+// Win32 relative paths (the issue — backslash separators)
+const win32Cases = [
+	["..\\a.js", path.join(fixtures, "a.js")],
+	[".\\foo", path.join(fixtures, "extensions", "foo.js")],
+];
+
+describe("win32 relative paths — resolver comparison", () => {
+	describe("enhanced-resolve", () => {
+		for (const [request, expected] of posixCases) {
+			it(`should resolve posix "${request}"`, () => {
+				expect(resolve.sync(context, request)).toBe(expected);
+			});
+		}
+
+		for (const [request, expected] of win32Cases) {
+			it(`should resolve win32 "${request}"`, () => {
+				expect(resolve.sync(context, request)).toBe(expected);
+			});
+		}
+	});
+
+	describe("oxc-resolver", () => {
+		const resolver = new OxcResolverFactory({ extensions: [".js"] });
+
+		for (const [request, expected] of posixCases) {
+			it(`should resolve posix "${request}"`, () => {
+				const result = resolver.sync(context, request);
+				expect(result.path).toBe(expected);
+			});
+		}
+
+		for (const [request] of win32Cases) {
+			it(`cannot resolve win32 "${request}"`, () => {
+				const result = resolver.sync(context, request);
+				expect(result.path).toBeUndefined();
+			});
+		}
+	});
+
+	describe("rspack-resolver", () => {
+		const resolver = new RspackResolverFactory({ extensions: [".js"] });
+
+		for (const [request, expected] of posixCases) {
+			it(`should resolve posix "${request}"`, () => {
+				const result = resolver.sync(context, request);
+				expect(result.path).toBe(expected);
+			});
+		}
+
+		for (const [request] of win32Cases) {
+			it(`cannot resolve win32 "${request}"`, () => {
+				const result = resolver.sync(context, request);
+				expect(result.path).toBeUndefined();
+			});
+		}
+	});
+});

From 1c72b667b3adedff50d6750403bdcc04d38540ed Mon Sep 17 00:00:00 2001
From: xiaoxiaojx <784487301@qq.com>
Date: Mon, 4 May 2026 00:17:57 +0800
Subject: [PATCH 6/6] Revert "fix: update"

This reverts commit b8f1b83b638bf2aac394cc2b8e6133866e9aca8c.
---
 .cspell.json                           |   2 -
 package-lock.json                      | 623 +------------------------
 package.json                           |   4 +-
 test/win32-relative-comparison.test.js |  73 ---
 4 files changed, 3 insertions(+), 699 deletions(-)
 delete mode 100644 test/win32-relative-comparison.test.js

diff --git a/.cspell.json b/.cspell.json
index e3bfa0db..df562c03 100644
--- a/.cspell.json
+++ b/.cspell.json
@@ -48,8 +48,6 @@
     "Sindre",
     "Sorhus",
     "readlink",
-    "rspack",
-    "Rspack",
     "extensionless",
     "ENOENT"
   ],
diff --git a/package-lock.json b/package-lock.json
index 917a1cb1..71ea2fcd 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "enhanced-resolve",
-  "version": "5.21.0",
+  "version": "5.20.1",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "enhanced-resolve",
-      "version": "5.21.0",
+      "version": "5.20.1",
       "license": "MIT",
       "dependencies": {
         "graceful-fs": "^4.2.4",
@@ -26,10 +26,8 @@
         "jest": "^30.3.0",
         "lint-staged": "^16.2.7",
         "memfs": "^4.56.11",
-        "oxc-resolver": "^11.19.1",
         "prettier": "^3.7.4",
         "prettier-2": "npm:prettier@^2",
-        "rspack-resolver": "^1.3.0",
         "tinybench": "^6.0.0",
         "tooling": "webpack/tooling#v1.26.1",
         "typescript": "^6.0.2"
@@ -3394,332 +3392,6 @@
         "node": ">= 8"
       }
     },
-    "node_modules/@oxc-resolver/binding-android-arm-eabi": {
-      "version": "11.19.1",
-      "resolved": "https://registry.npmjs.org/@oxc-resolver/binding-android-arm-eabi/-/binding-android-arm-eabi-11.19.1.tgz",
-      "integrity": "sha512-aUs47y+xyXHUKlbhqHUjBABjvycq6YSD7bpxSW7vplUmdzAlJ93yXY6ZR0c1o1x5A/QKbENCvs3+NlY8IpIVzg==",
-      "cpu": [
-        "arm"
-      ],
-      "dev": true,
-      "license": "MIT",
-      "optional": true,
-      "os": [
-        "android"
-      ]
-    },
-    "node_modules/@oxc-resolver/binding-android-arm64": {
-      "version": "11.19.1",
-      "resolved": "https://registry.npmjs.org/@oxc-resolver/binding-android-arm64/-/binding-android-arm64-11.19.1.tgz",
-      "integrity": "sha512-oolbkRX+m7Pq2LNjr/kKgYeC7bRDMVTWPgxBGMjSpZi/+UskVo4jsMU3MLheZV55jL6c3rNelPl4oD60ggYmqA==",
-      "cpu": [
-        "arm64"
-      ],
-      "dev": true,
-      "license": "MIT",
-      "optional": true,
-      "os": [
-        "android"
-      ]
-    },
-    "node_modules/@oxc-resolver/binding-darwin-arm64": {
-      "version": "11.19.1",
-      "resolved": "https://registry.npmjs.org/@oxc-resolver/binding-darwin-arm64/-/binding-darwin-arm64-11.19.1.tgz",
-      "integrity": "sha512-nUC6d2i3R5B12sUW4O646qD5cnMXf2oBGPLIIeaRfU9doJRORAbE2SGv4eW6rMqhD+G7nf2Y8TTJTLiiO3Q/dQ==",
-      "cpu": [
-        "arm64"
-      ],
-      "dev": true,
-      "license": "MIT",
-      "optional": true,
-      "os": [
-        "darwin"
-      ]
-    },
-    "node_modules/@oxc-resolver/binding-darwin-x64": {
-      "version": "11.19.1",
-      "resolved": "https://registry.npmjs.org/@oxc-resolver/binding-darwin-x64/-/binding-darwin-x64-11.19.1.tgz",
-      "integrity": "sha512-cV50vE5+uAgNcFa3QY1JOeKDSkM/9ReIcc/9wn4TavhW/itkDGrXhw9jaKnkQnGbjJ198Yh5nbX/Gr2mr4Z5jQ==",
-      "cpu": [
-        "x64"
-      ],
-      "dev": true,
-      "license": "MIT",
-      "optional": true,
-      "os": [
-        "darwin"
-      ]
-    },
-    "node_modules/@oxc-resolver/binding-freebsd-x64": {
-      "version": "11.19.1",
-      "resolved": "https://registry.npmjs.org/@oxc-resolver/binding-freebsd-x64/-/binding-freebsd-x64-11.19.1.tgz",
-      "integrity": "sha512-xZOQiYGFxtk48PBKff+Zwoym7ScPAIVp4c14lfLxizO2LTTTJe5sx9vQNGrBymrf/vatSPNMD4FgsaaRigPkqw==",
-      "cpu": [
-        "x64"
-      ],
-      "dev": true,
-      "license": "MIT",
-      "optional": true,
-      "os": [
-        "freebsd"
-      ]
-    },
-    "node_modules/@oxc-resolver/binding-linux-arm-gnueabihf": {
-      "version": "11.19.1",
-      "resolved": "https://registry.npmjs.org/@oxc-resolver/binding-linux-arm-gnueabihf/-/binding-linux-arm-gnueabihf-11.19.1.tgz",
-      "integrity": "sha512-lXZYWAC6kaGe/ky2su94e9jN9t6M0/6c+GrSlCqL//XO1cxi5lpAhnJYdyrKfm0ZEr/c7RNyAx3P7FSBcBd5+A==",
-      "cpu": [
-        "arm"
-      ],
-      "dev": true,
-      "license": "MIT",
-      "optional": true,
-      "os": [
-        "linux"
-      ]
-    },
-    "node_modules/@oxc-resolver/binding-linux-arm-musleabihf": {
-      "version": "11.19.1",
-      "resolved": "https://registry.npmjs.org/@oxc-resolver/binding-linux-arm-musleabihf/-/binding-linux-arm-musleabihf-11.19.1.tgz",
-      "integrity": "sha512-veG1kKsuK5+t2IsO9q0DErYVSw2azvCVvWHnfTOS73WE0STdLLB7Q1bB9WR+yHPQM76ASkFyRbogWo1GR1+WbQ==",
-      "cpu": [
-        "arm"
-      ],
-      "dev": true,
-      "license": "MIT",
-      "optional": true,
-      "os": [
-        "linux"
-      ]
-    },
-    "node_modules/@oxc-resolver/binding-linux-arm64-gnu": {
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-      "resolved": "https://registry.npmjs.org/@oxc-resolver/binding-linux-arm64-gnu/-/binding-linux-arm64-gnu-11.19.1.tgz",
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-        "arm64"
-      ],
-      "dev": true,
-      "libc": [
-        "glibc"
-      ],
-      "license": "MIT",
-      "optional": true,
-      "os": [
-        "linux"
-      ]
-    },
-    "node_modules/@oxc-resolver/binding-linux-arm64-musl": {
-      "version": "11.19.1",
-      "resolved": "https://registry.npmjs.org/@oxc-resolver/binding-linux-arm64-musl/-/binding-linux-arm64-musl-11.19.1.tgz",
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-      "dev": true,
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-        "musl"
-      ],
-      "license": "MIT",
-      "optional": true,
-      "os": [
-        "linux"
-      ]
-    },
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-      "resolved": "https://registry.npmjs.org/@oxc-resolver/binding-linux-ppc64-gnu/-/binding-linux-ppc64-gnu-11.19.1.tgz",
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-        "ppc64"
-      ],
-      "dev": true,
-      "libc": [
-        "glibc"
-      ],
-      "license": "MIT",
-      "optional": true,
-      "os": [
-        "linux"
-      ]
-    },
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-      "resolved": "https://registry.npmjs.org/@oxc-resolver/binding-linux-riscv64-gnu/-/binding-linux-riscv64-gnu-11.19.1.tgz",
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-        "riscv64"
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-      "dev": true,
-      "libc": [
-        "glibc"
-      ],
-      "license": "MIT",
-      "optional": true,
-      "os": [
-        "linux"
-      ]
-    },
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-      "license": "MIT",
-      "optional": true,
-      "os": [
-        "linux"
-      ]
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-      ]
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-      ]
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-      "license": "MIT",
-      "optional": true,
-      "os": [
-        "openharmony"
-      ]
-    },
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-        "wasm32"
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-      "dev": true,
-      "license": "MIT",
-      "optional": true,
-      "dependencies": {
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-      },
-      "engines": {
-        "node": ">=14.0.0"
-      }
-    },
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-      "dependencies": {
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-      },
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-        "type": "github",
-        "url": "https://github.com/sponsors/Brooooooklyn"
-      },
-      "peerDependencies": {
-        "@emnapi/core": "^1.7.1",
-        "@emnapi/runtime": "^1.7.1"
-      }
-    },
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-      "optional": true,
-      "os": [
-        "win32"
-      ]
-    },
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-      "license": "MIT",
-      "optional": true,
-      "os": [
-        "win32"
-      ]
-    },
-    "node_modules/@oxc-resolver/binding-win32-x64-msvc": {
-      "version": "11.19.1",
-      "resolved": "https://registry.npmjs.org/@oxc-resolver/binding-win32-x64-msvc/-/binding-win32-x64-msvc-11.19.1.tgz",
-      "integrity": "sha512-6hIU3RQu45B+VNTY4Ru8ppFwjVS/S5qwYyGhBotmjxfEKk41I2DlGtRfGJndZ5+6lneE2pwloqunlOyZuX/XAw==",
-      "cpu": [
-        "x64"
-      ],
-      "dev": true,
-      "license": "MIT",
-      "optional": true,
-      "os": [
-        "win32"
-      ]
-    },
     "node_modules/@pkgjs/parseargs": {
       "version": "0.11.0",
       "resolved": "https://registry.npmjs.org/@pkgjs/parseargs/-/parseargs-0.11.0.tgz",
@@ -4580,237 +4252,6 @@
         "win32"
       ]
     },
-    "node_modules/@unrs/rspack-resolver-binding-darwin-arm64": {
-      "version": "1.3.0",
-      "resolved": "https://registry.npmjs.org/@unrs/rspack-resolver-binding-darwin-arm64/-/rspack-resolver-binding-darwin-arm64-1.3.0.tgz",
-      "integrity": "sha512-EcjI0Hh2HiNOM0B9UuYH1PfLWgE6/SBQ4dKoHXWNloERfveha/n6aUZSBThtPGnJenmdfaJYXXZtqyNbWtJAFw==",
-      "cpu": [
-        "arm64"
-      ],
-      "dev": true,
-      "license": "MIT",
-      "optional": true,
-      "os": [
-        "darwin"
-      ]
-    },
-    "node_modules/@unrs/rspack-resolver-binding-darwin-x64": {
-      "version": "1.3.0",
-      "resolved": "https://registry.npmjs.org/@unrs/rspack-resolver-binding-darwin-x64/-/rspack-resolver-binding-darwin-x64-1.3.0.tgz",
-      "integrity": "sha512-3CgG+mhfudDfnaDqwEl0W1mcGTto5f5mqPyJSXcWDxrnNc7pr/p01khIgWOoOD1eCwVejmgpYvRKGBwJPwgHOQ==",
-      "cpu": [
-        "x64"
-      ],
-      "dev": true,
-      "license": "MIT",
-      "optional": true,
-      "os": [
-        "darwin"
-      ]
-    },
-    "node_modules/@unrs/rspack-resolver-binding-freebsd-x64": {
-      "version": "1.3.0",
-      "resolved": "https://registry.npmjs.org/@unrs/rspack-resolver-binding-freebsd-x64/-/rspack-resolver-binding-freebsd-x64-1.3.0.tgz",
-      "integrity": "sha512-ww8BwryDrpXlSajwSIEUXEv8oKDkw04L2ke3hxjaxWohuBV8pAQie9XBS4yQTyREuL2ypcqbARfoCXJJzVp7ig==",
-      "cpu": [
-        "x64"
-      ],
-      "dev": true,
-      "license": "MIT",
-      "optional": true,
-      "os": [
-        "freebsd"
-      ]
-    },
-    "node_modules/@unrs/rspack-resolver-binding-linux-arm-gnueabihf": {
-      "version": "1.3.0",
-      "resolved": "https://registry.npmjs.org/@unrs/rspack-resolver-binding-linux-arm-gnueabihf/-/rspack-resolver-binding-linux-arm-gnueabihf-1.3.0.tgz",
-      "integrity": "sha512-WyhonI1mkuAlnG2iaMjk7uy4aWX+FWi2Au8qCCwj57wVHbAEfrN6xN2YhzbrsCC+ciumKhj5c01MqwsnYDNzWQ==",
-      "cpu": [
-        "arm"
-      ],
-      "dev": true,
-      "license": "MIT",
-      "optional": true,
-      "os": [
-        "linux"
-      ]
-    },
-    "node_modules/@unrs/rspack-resolver-binding-linux-arm-musleabihf": {
-      "version": "1.3.0",
-      "resolved": "https://registry.npmjs.org/@unrs/rspack-resolver-binding-linux-arm-musleabihf/-/rspack-resolver-binding-linux-arm-musleabihf-1.3.0.tgz",
-      "integrity": "sha512-+uCP6hIAMVWHKQnLZHESJ1U1TFVGLR3FTeaS2A4zB0k8w+IbZlWwl9FiBUOwOiqhcCCyKiUEifgnYFNGpxi3pw==",
-      "cpu": [
-        "arm"
-      ],
-      "dev": true,
-      "license": "MIT",
-      "optional": true,
-      "os": [
-        "linux"
-      ]
-    },
-    "node_modules/@unrs/rspack-resolver-binding-linux-arm64-gnu": {
-      "version": "1.3.0",
-      "resolved": "https://registry.npmjs.org/@unrs/rspack-resolver-binding-linux-arm64-gnu/-/rspack-resolver-binding-linux-arm64-gnu-1.3.0.tgz",
-      "integrity": "sha512-p+s/Wp8rf75Qqs2EPw4HC0xVLLW+/60MlVAsB7TYLoeg1e1CU/QCis36FxpziLS0ZY2+wXdTnPUxr+5kkThzwQ==",
-      "cpu": [
-        "arm64"
-      ],
-      "dev": true,
-      "libc": [
-        "glibc"
-      ],
-      "license": "MIT",
-      "optional": true,
-      "os": [
-        "linux"
-      ]
-    },
-    "node_modules/@unrs/rspack-resolver-binding-linux-arm64-musl": {
-      "version": "1.3.0",
-      "resolved": "https://registry.npmjs.org/@unrs/rspack-resolver-binding-linux-arm64-musl/-/rspack-resolver-binding-linux-arm64-musl-1.3.0.tgz",
-      "integrity": "sha512-cZEL9jmZ2kAN53MEk+fFCRJM8pRwOEboDn7sTLjZW+hL6a0/8JNfHP20n8+MBDrhyD34BSF4A6wPCj/LNhtOIQ==",
-      "cpu": [
-        "arm64"
-      ],
-      "dev": true,
-      "libc": [
-        "musl"
-      ],
-      "license": "MIT",
-      "optional": true,
-      "os": [
-        "linux"
-      ]
-    },
-    "node_modules/@unrs/rspack-resolver-binding-linux-ppc64-gnu": {
-      "version": "1.3.0",
-      "resolved": "https://registry.npmjs.org/@unrs/rspack-resolver-binding-linux-ppc64-gnu/-/rspack-resolver-binding-linux-ppc64-gnu-1.3.0.tgz",
-      "integrity": "sha512-IOeRhcMXTNlk2oApsOozYVcOHu4t1EKYKnTz4huzdPyKNPX0Y9C7X8/6rk4aR3Inb5s4oVMT9IVKdgNXLcpGAQ==",
-      "cpu": [
-        "ppc64"
-      ],
-      "dev": true,
-      "libc": [
-        "glibc"
-      ],
-      "license": "MIT",
-      "optional": true,
-      "os": [
-        "linux"
-      ]
-    },
-    "node_modules/@unrs/rspack-resolver-binding-linux-s390x-gnu": {
-      "version": "1.3.0",
-      "resolved": "https://registry.npmjs.org/@unrs/rspack-resolver-binding-linux-s390x-gnu/-/rspack-resolver-binding-linux-s390x-gnu-1.3.0.tgz",
-      "integrity": "sha512-op54XrlEbhgVRCxzF1pHFcLamdOmHDapwrqJ9xYRB7ZjwP/zQCKzz/uAsSaAlyQmbSi/PXV7lwfca4xkv860/Q==",
-      "cpu": [
-        "s390x"
-      ],
-      "dev": true,
-      "libc": [
-        "glibc"
-      ],
-      "license": "MIT",
-      "optional": true,
-      "os": [
-        "linux"
-      ]
-    },
-    "node_modules/@unrs/rspack-resolver-binding-linux-x64-gnu": {
-      "version": "1.3.0",
-      "resolved": "https://registry.npmjs.org/@unrs/rspack-resolver-binding-linux-x64-gnu/-/rspack-resolver-binding-linux-x64-gnu-1.3.0.tgz",
-      "integrity": "sha512-orbQF7sN02N/b9QF8Xp1RBO5YkfI+AYo9VZw0H2Gh4JYWSuiDHjOPEeFPDIRyWmXbQJuiVNSB+e1pZOjPPKIyg==",
-      "cpu": [
-        "x64"
-      ],
-      "dev": true,
-      "libc": [
-        "glibc"
-      ],
-      "license": "MIT",
-      "optional": true,
-      "os": [
-        "linux"
-      ]
-    },
-    "node_modules/@unrs/rspack-resolver-binding-linux-x64-musl": {
-      "version": "1.3.0",
-      "resolved": "https://registry.npmjs.org/@unrs/rspack-resolver-binding-linux-x64-musl/-/rspack-resolver-binding-linux-x64-musl-1.3.0.tgz",
-      "integrity": "sha512-kpjqjIAC9MfsjmlgmgeC8U9gZi6g/HTuCqpI7SBMjsa7/9MvBaQ6TJ7dtnsV/+DXvfJ2+L5teBBXG+XxfpvIFA==",
-      "cpu": [
-        "x64"
-      ],
-      "dev": true,
-      "libc": [
-        "musl"
-      ],
-      "license": "MIT",
-      "optional": true,
-      "os": [
-        "linux"
-      ]
-    },
-    "node_modules/@unrs/rspack-resolver-binding-wasm32-wasi": {
-      "version": "1.3.0",
-      "resolved": "https://registry.npmjs.org/@unrs/rspack-resolver-binding-wasm32-wasi/-/rspack-resolver-binding-wasm32-wasi-1.3.0.tgz",
-      "integrity": "sha512-JAg0hY3kGsCPk7Jgh16yMTBZ6VEnoNR1DFZxiozjKwH+zSCfuDuM5S15gr50ofbwVw9drobIP2TTHdKZ15MJZQ==",
-      "cpu": [
-        "wasm32"
-      ],
-      "dev": true,
-      "license": "MIT",
-      "optional": true,
-      "dependencies": {
-        "@napi-rs/wasm-runtime": "^0.2.7"
-      },
-      "engines": {
-        "node": ">=14.0.0"
-      }
-    },
-    "node_modules/@unrs/rspack-resolver-binding-win32-arm64-msvc": {
-      "version": "1.3.0",
-      "resolved": "https://registry.npmjs.org/@unrs/rspack-resolver-binding-win32-arm64-msvc/-/rspack-resolver-binding-win32-arm64-msvc-1.3.0.tgz",
-      "integrity": "sha512-h5N83i407ntS3ndDkhT/3vC3Dj8oP0BIwMtekETNJcxk7IuWccSXifzCEhdxxu/FOX4OICGIHdHrxf5fJuAjfw==",
-      "cpu": [
-        "arm64"
-      ],
-      "dev": true,
-      "license": "MIT",
-      "optional": true,
-      "os": [
-        "win32"
-      ]
-    },
-    "node_modules/@unrs/rspack-resolver-binding-win32-ia32-msvc": {
-      "version": "1.3.0",
-      "resolved": "https://registry.npmjs.org/@unrs/rspack-resolver-binding-win32-ia32-msvc/-/rspack-resolver-binding-win32-ia32-msvc-1.3.0.tgz",
-      "integrity": "sha512-9QH7Gq3dRL8Q/D6PGS3Dwtjx9yw6kbCEu6iBkAUhFTDAuVUk2L0H/5NekRVA13AQaSc3OsEUKt60EOn/kq5Dug==",
-      "cpu": [
-        "ia32"
-      ],
-      "dev": true,
-      "license": "MIT",
-      "optional": true,
-      "os": [
-        "win32"
-      ]
-    },
-    "node_modules/@unrs/rspack-resolver-binding-win32-x64-msvc": {
-      "version": "1.3.0",
-      "resolved": "https://registry.npmjs.org/@unrs/rspack-resolver-binding-win32-x64-msvc/-/rspack-resolver-binding-win32-x64-msvc-1.3.0.tgz",
-      "integrity": "sha512-IYuXJCuwBOVV0H73l6auaZwtAPHjCPBJkxd4Co0yO6dSjDM5Na5OceaxhUmJLZ3z8kuEGhTYWIHH7PchGztnlg==",
-      "cpu": [
-        "x64"
-      ],
-      "dev": true,
-      "license": "MIT",
-      "optional": true,
-      "os": [
-        "win32"
-      ]
-    },
     "node_modules/@yarnpkg/lockfile": {
       "version": "1.1.0",
       "resolved": "https://registry.npmjs.org/@yarnpkg/lockfile/-/lockfile-1.1.0.tgz",
@@ -12337,38 +11778,6 @@
         "url": "https://github.com/sponsors/ljharb"
       }
     },
-    "node_modules/oxc-resolver": {
-      "version": "11.19.1",
-      "resolved": "https://registry.npmjs.org/oxc-resolver/-/oxc-resolver-11.19.1.tgz",
-      "integrity": "sha512-qE/CIg/spwrTBFt5aKmwe3ifeDdLfA2NESN30E42X/lII5ClF8V7Wt6WIJhcGZjp0/Q+nQ+9vgxGk//xZNX2hg==",
-      "dev": true,
-      "license": "MIT",
-      "funding": {
-        "url": "https://github.com/sponsors/Boshen"
-      },
-      "optionalDependencies": {
-        "@oxc-resolver/binding-android-arm-eabi": "11.19.1",
-        "@oxc-resolver/binding-android-arm64": "11.19.1",
-        "@oxc-resolver/binding-darwin-arm64": "11.19.1",
-        "@oxc-resolver/binding-darwin-x64": "11.19.1",
-        "@oxc-resolver/binding-freebsd-x64": "11.19.1",
-        "@oxc-resolver/binding-linux-arm-gnueabihf": "11.19.1",
-        "@oxc-resolver/binding-linux-arm-musleabihf": "11.19.1",
-        "@oxc-resolver/binding-linux-arm64-gnu": "11.19.1",
-        "@oxc-resolver/binding-linux-arm64-musl": "11.19.1",
-        "@oxc-resolver/binding-linux-ppc64-gnu": "11.19.1",
-        "@oxc-resolver/binding-linux-riscv64-gnu": "11.19.1",
-        "@oxc-resolver/binding-linux-riscv64-musl": "11.19.1",
-        "@oxc-resolver/binding-linux-s390x-gnu": "11.19.1",
-        "@oxc-resolver/binding-linux-x64-gnu": "11.19.1",
-        "@oxc-resolver/binding-linux-x64-musl": "11.19.1",
-        "@oxc-resolver/binding-openharmony-arm64": "11.19.1",
-        "@oxc-resolver/binding-wasm32-wasi": "11.19.1",
-        "@oxc-resolver/binding-win32-arm64-msvc": "11.19.1",
-        "@oxc-resolver/binding-win32-ia32-msvc": "11.19.1",
-        "@oxc-resolver/binding-win32-x64-msvc": "11.19.1"
-      }
-    },
     "node_modules/p-filter": {
       "version": "2.1.0",
       "resolved": "https://registry.npmjs.org/p-filter/-/p-filter-2.1.0.tgz",
@@ -13140,34 +12549,6 @@
       "dev": true,
       "license": "MIT"
     },
-    "node_modules/rspack-resolver": {
-      "version": "1.3.0",
-      "resolved": "https://registry.npmjs.org/rspack-resolver/-/rspack-resolver-1.3.0.tgz",
-      "integrity": "sha512-az/PLDwa1xijNv4bAFBS8mtqqJC1Y3lVyFag4cuyIUOHq/ft5kSZlHbqYaLZLpsQtPWv4ZGDo5ycySKJzUvU/A==",
-      "deprecated": "Please migrate to the brand new `@rspack/resolver` or `unrs-resolver` instead",
-      "dev": true,
-      "license": "MIT",
-      "funding": {
-        "url": "https://github.com/sponsors/JounQin"
-      },
-      "optionalDependencies": {
-        "@unrs/rspack-resolver-binding-darwin-arm64": "1.3.0",
-        "@unrs/rspack-resolver-binding-darwin-x64": "1.3.0",
-        "@unrs/rspack-resolver-binding-freebsd-x64": "1.3.0",
-        "@unrs/rspack-resolver-binding-linux-arm-gnueabihf": "1.3.0",
-        "@unrs/rspack-resolver-binding-linux-arm-musleabihf": "1.3.0",
-        "@unrs/rspack-resolver-binding-linux-arm64-gnu": "1.3.0",
-        "@unrs/rspack-resolver-binding-linux-arm64-musl": "1.3.0",
-        "@unrs/rspack-resolver-binding-linux-ppc64-gnu": "1.3.0",
-        "@unrs/rspack-resolver-binding-linux-s390x-gnu": "1.3.0",
-        "@unrs/rspack-resolver-binding-linux-x64-gnu": "1.3.0",
-        "@unrs/rspack-resolver-binding-linux-x64-musl": "1.3.0",
-        "@unrs/rspack-resolver-binding-wasm32-wasi": "1.3.0",
-        "@unrs/rspack-resolver-binding-win32-arm64-msvc": "1.3.0",
-        "@unrs/rspack-resolver-binding-win32-ia32-msvc": "1.3.0",
-        "@unrs/rspack-resolver-binding-win32-x64-msvc": "1.3.0"
-      }
-    },
     "node_modules/run-parallel": {
       "version": "1.2.0",
       "resolved": "https://registry.npmjs.org/run-parallel/-/run-parallel-1.2.0.tgz",
diff --git a/package.json b/package.json
index 57f3942e..f6c80ee6 100644
--- a/package.json
+++ b/package.json
@@ -71,12 +71,10 @@
     "jest": "^30.3.0",
     "lint-staged": "^16.2.7",
     "memfs": "^4.56.11",
-    "oxc-resolver": "^11.19.1",
     "prettier": "^3.7.4",
     "prettier-2": "npm:prettier@^2",
-    "rspack-resolver": "^1.3.0",
-    "tinybench": "^6.0.0",
     "tooling": "webpack/tooling#v1.26.1",
+    "tinybench": "^6.0.0",
     "typescript": "^6.0.2"
   },
   "engines": {
diff --git a/test/win32-relative-comparison.test.js b/test/win32-relative-comparison.test.js
deleted file mode 100644
index 69761c6c..00000000
--- a/test/win32-relative-comparison.test.js
+++ /dev/null
@@ -1,73 +0,0 @@
-"use strict";
-
-const path = require("path");
-const { ResolverFactory: OxcResolverFactory } = require("oxc-resolver");
-const { ResolverFactory: RspackResolverFactory } = require("rspack-resolver");
-const resolve = require("../");
-
-const fixtures = path.join(__dirname, "fixtures");
-const context = path.join(fixtures, "extensions");
-
-// Posix relative paths (control group — should always pass)
-const posixCases = [
-	["../a.js", path.join(fixtures, "a.js")],
-	["./foo", path.join(fixtures, "extensions", "foo.js")],
-];
-
-// Win32 relative paths (the issue — backslash separators)
-const win32Cases = [
-	["..\\a.js", path.join(fixtures, "a.js")],
-	[".\\foo", path.join(fixtures, "extensions", "foo.js")],
-];
-
-describe("win32 relative paths — resolver comparison", () => {
-	describe("enhanced-resolve", () => {
-		for (const [request, expected] of posixCases) {
-			it(`should resolve posix "${request}"`, () => {
-				expect(resolve.sync(context, request)).toBe(expected);
-			});
-		}
-
-		for (const [request, expected] of win32Cases) {
-			it(`should resolve win32 "${request}"`, () => {
-				expect(resolve.sync(context, request)).toBe(expected);
-			});
-		}
-	});
-
-	describe("oxc-resolver", () => {
-		const resolver = new OxcResolverFactory({ extensions: [".js"] });
-
-		for (const [request, expected] of posixCases) {
-			it(`should resolve posix "${request}"`, () => {
-				const result = resolver.sync(context, request);
-				expect(result.path).toBe(expected);
-			});
-		}
-
-		for (const [request] of win32Cases) {
-			it(`cannot resolve win32 "${request}"`, () => {
-				const result = resolver.sync(context, request);
-				expect(result.path).toBeUndefined();
-			});
-		}
-	});
-
-	describe("rspack-resolver", () => {
-		const resolver = new RspackResolverFactory({ extensions: [".js"] });
-
-		for (const [request, expected] of posixCases) {
-			it(`should resolve posix "${request}"`, () => {
-				const result = resolver.sync(context, request);
-				expect(result.path).toBe(expected);
-			});
-		}
-
-		for (const [request] of win32Cases) {
-			it(`cannot resolve win32 "${request}"`, () => {
-				const result = resolver.sync(context, request);
-				expect(result.path).toBeUndefined();
-			});
-		}
-	});
-});