On the standards track: Yes
Is Experimental: No
Is Deprecated: No
In Chrome version 23 on 2012-11-06
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 21 on 2013-05-14
In Firefox for Android version 21 on 2013-05-14
In Internet Explorer version 9 on 2011-03-14
In Node.js version 0.10.0 on 2013-03-11
In Quest Browser version 5.0 on undefined
In Opera version 15 on 2013-07-02
In Opera Android version 14 on 2013-05-21
In Safari version 6 on 2012-07-25
In Safari on iOS version 6 on 2012-09-10
In Samsung Internet version 1.5 on 2013-09-25
In WebView Android version 4.4 on 2013-12-09