On the standards track: Yes
Is Experimental: No
Is Deprecated: No
In Chrome version 25 on 2013-02-21
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 39 on 2015-07-02
In Firefox for Android version 39 on 2015-07-02
In Internet Explorer version 8 on 2009-03-19
In Node.js version 8.3.0 on 2017-08-09
In Quest Browser version 5.0 on undefined
In Opera version 12 on 2012-06-14
In Opera Android version 12 on 2012-02-25
In Safari version 7 on 2013-10-22
In Safari on iOS version 7 on 2013-09-18
In Samsung Internet version 1.5 on 2013-09-25
In WebView Android version 4.4 on 2013-12-09