On the standards track: Yes
Is Experimental: No
Is Deprecated: No
In Chrome version 47 on 2015-12-01 Note: Available in dedicated workers and shared workers, not available in service workers. See bug 332663431.
In Chrome Android version 47 on 2015-12-02 Note: Available in dedicated workers and shared workers, not available in service workers. See bug 332663431.
In Edge version 79 on 2020-01-15 Note: Available in dedicated workers and shared workers, not available in service workers. See bug 332663431.
In Firefox version 54 on 2017-06-13
In Firefox for Android version 54 on 2017-06-13
Not in Internet Explorer
In Quest Browser version 5.0 on undefined Note: Available in dedicated workers and shared workers, not available in service workers. See bug 332663431.
In Opera version 34 on 2015-12-08 Note: Available in dedicated workers and shared workers, not available in service workers. See bug 332663431.
In Opera Android version 34 on 2015-12-16 Note: Available in dedicated workers and shared workers, not available in service workers. See bug 332663431.
In Safari version 10 on 2016-09-20
In Safari on iOS version 10 on 2016-09-13
In Samsung Internet version 5.0 on 2016-12-15 Note: Available in dedicated workers and shared workers, not available in service workers. See bug 332663431.
In WebView Android version 47 on 2015-12-02 Note: Available in dedicated workers and shared workers, not available in service workers. See bug 332663431.
In WebView on iOS version 10 on 2016-09-13