On the standards track: Yes
Is Experimental: No
Is Deprecated: No
In Chrome version 61 on 2017-09-05
In Chrome Android version 61 on 2017-09-05
In Edge version 79 on 2020-01-15
In Firefox version 31 on 2014-07-22 Note: Before Firefox 69, the default value of p1 through p4 was undefined; now DOMQuadInit defines these as false.
In Firefox for Android version 31 on 2014-07-22 Note: Before Firefox for Android 79, the default value of p1 through p4 was undefined; now DOMQuadInit defines these as false.
Not in Internet Explorer
In Quest Browser version 5.0 on undefined
In Opera version 48 on 2017-09-27
In Opera Android version 45 on 2018-02-15
In Safari version 11 on 2017-09-19
In Safari on iOS version 11 on 2017-09-19
In Samsung Internet version 8.0 on 2018-07-18
In WebView Android version 61 on 2017-09-05
In WebView on iOS version 11 on 2017-09-19