On the standards track: Yes
Is Experimental: No
Is Deprecated: No
In Chrome version 21 on 2012-07-31
In Chrome Android version 25 on 2013-02-27
In Deno version 1.0 on 2020-05-13
In Edge version 12 on 2015-07-28
In Firefox version 36 on 2015-02-24
In Firefox for Android version 36 on 2015-02-27
In Internet Explorer version 11 on 2013-10-17
In Node.js version 6.0.0 on 2016-04-26
In Quest Browser version 5.0 on undefined
In Opera version 9 on 2006-06-20
In Opera Android version 10.1 on 2010-11-09
In Safari version 5.1 on 2011-07-20
In Safari on iOS version 5 on 2011-10-12
In Samsung Internet version 1.5 on 2013-09-25
In WebView Android version 4.4 on 2013-12-09