TimeInput component's value is the full date.

[khukeke]

code is :
<TimeInput {...prop} options={{format: 'HH:mm:ss'}}/>

I use 'format' to format display. but the value is like this: 'Thu Mar 21 2019 00:58:01 GMT+0800'

I want value is like this: '00:58:01'.

thanks.