On the standards track: Yes
Is Experimental: No
Is Deprecated: No
In Chrome version 1 on 2008-12-11
In Chrome Android version 18 on 2012-06-27
In Edge version 12 on 2015-07-28
In Firefox version 3 on 2008-06-17
In Firefox for Android version 4 on 2011-03-29
In Internet Explorer version 5.5 on 2000-07-06
In Quest Browser version 5.0 on undefined
In Opera version 9 on 2006-06-20
In Opera Android version 14 on 2013-05-21
In Safari version ≤4 on undefined
In Safari on iOS version ≤3 on undefined
In Samsung Internet version 1.0 on 2013-04-27
In WebView Android version 4.4 on 2013-12-09