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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.

Note: Since Firefox 58, this media feature is no longer available to web content — it is only available internally (e.g. to XUL / chrome code). See bug 1396066 for more details.


If the user is using Windows unthemed (in classic mode instead of using uxtheme), this is 1. Otherwise it's 0.

Media: media/visual
Accepts min/max prefixes: no

See also

Document Tags and Contributors

 Contributors to this page: chrisdavidmills, mfluehr
 Last updated by: chrisdavidmills,