This feature is non-standard and is not on a standards track. Do not use it on production sites facing the Web: it will not work for every user. There may also be large incompatibilities between implementations and the behavior may change in the future.


The ::-webkit-progress-bar CSS pseudo-element represents the entire bar of a <progress> element. Normally it's only visible as the unfilled portion of the bar, since by default it's rendered below the ::-webkit-progress-value pseudo-element. It is a child of the ::-webkit-progress-inner-element pseudo-element and the parent of the ::-webkit-progress-value pseudo-element.


Not part of any specification. This is a proprietary pseudo-element specific to WebKit/Blink.

Browser compatibility

Feature Firefox (Gecko) Chrome Internet Explorer Opera Safari
Basic support Not supported (Yes) Not supported (Yes) (Yes)
Feature Firefox Mobile (Gecko) Android IE Phone Opera Mobile Safari Mobile
Basic support Not supported (Yes) Not supported (Yes) (Yes)

See also

Document Tags and Contributors

 Contributors to this page: teoli, cvrebert
 Last updated by: teoli,