On the standards track: Yes
Is Experimental: No
Is Deprecated: No
In Chrome version 31 on 2013-11-12
In Chrome Android version 31 on 2013-11-14
In Edge version 12 on 2015-07-29
In Firefox version 17 on 2012-11-20
In Firefox for Android version 17 on 2012-11-20
In Internet Explorer version 9 on 2011-03-14 Note: IE9 supports an old draft of the spec where this value was a long instead of a double.
In Quest Browser version 5.0 on undefined
In Opera version 18 on 2013-11-19
In Opera Android version 18 on 2013-11-20
In Safari version 8 on 2014-10-16
In Safari on iOS version 8 on 2014-09-17
In Samsung Internet version 2.0 on 2014-10-17
In WebView Android version 4.4.3 on 2014-06-02
In WebView on iOS version 8 on 2014-09-17