Feature queries are supported by Chrome 28+, Microsoft Edge 12+, Firefox 52+, Safari 9+, iOS Safari 9+, Opera 12.1+ and Chrome for Android 71+. There's no support for IE, but that really isn't the point.
vhvalue is supported, the viewport height of the browser, 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
not operator is also supported.