Feature queries are supported by Chrome 63+, Microsoft Edge 16+, Firefox 57+, Safari 11+, iOS Safari 11.2+, Chrome for Android 62+, and UC Browser for Android 11.4+. There's no support in Microsoft IE, but it doesn't really matter.
This article shows how to use feature queries in CSS, and how they work even with older browsers that don't even know they're there.
vhvalue is supported. This is the height of the browser window, the viewport height, rather than the height of the page. If so, it sets the
The following example shows real world use of feature queries.
100%, unless the browser supports the
vhvalue. Older browsers will simply ignore the feature queries block.
not operator is also supported.