On the standards track: Yes
Is Experimental: No
Is Deprecated: No
In Chrome version 1 on 2008-12-11 Note: Starting with version 59 this property is no longer required to always return 24.
In Chrome Android version 18 on 2012-06-27 Note: Starting with version 59 this property is no longer required to always return 24.
In Edge version 12 on 2015-07-29
In Firefox version 1 on 2004-11-09
In Firefox for Android version 4 on 2011-03-29
In Internet Explorer version 9 on 2011-03-14
In Quest Browser version 5.0 on undefined Note: Starting with version 5.0 this property is no longer required to always return 24.
In Opera version ≤12.1 on undefined
In Opera Android version ≤12.1 on undefined
In Safari version 1 on 2003-06-23
In Safari on iOS version 1 on 2007-06-29
In Samsung Internet version 1.0 on 2013-04-27 Note: Starting with Samsung Internet 7.0 this property is no longer required to always return 24.
In WebView Android version 4.4 on 2013-12-09 Note: Starting with version 59 this property is no longer required to always return 24.
In WebView on iOS version 1 on 2007-06-29