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 ::-ms-fill-upper CSS pseudo-element represents the portion of the "groove" of a slider control corresponding to values greater than the value currently selected by the "thumb" that the user moves. A slider control is one possible representation of an <input> element of type="range".


Not part of any specification.

Browser compatibility

We're converting our compatibility data into a machine-readable JSON format. This compatibility table still uses the old format, because we haven't yet converted the data it contains. Find out how you can help!

Feature Firefox (Gecko) Chrome Edge Internet Explorer Opera Safari
Basic support No support No support (Yes) (Yes) No support No support
Feature Firefox Mobile (Gecko) Android Edge IE Phone Opera Mobile Safari Mobile
Basic support No support No support (Yes) ? No support No support

See also

Document Tags and Contributors

 Contributors to this page: jameshkramer, mfluehr, erikadoyle, Sebastianz, cvrebert
 Last updated by: jameshkramer,