On the standards track: Yes
Is Experimental: No
Is Deprecated: No
In Bun version 1.0.0 on 2023-09-08
In Chrome version 2 on 2009-05-21
In Chrome Android version 18 on 2012-06-27
In Deno version 1.0 on 2020-05-13
In Edge version 12 on 2015-07-29
In Firefox version 28 on 2014-03-18
In Firefox for Android version 28 on 2014-03-18
In Internet Explorer version 8 on 2009-03-19
In Node.js version 10.0.0 on 2018-04-24 Note: Throws error when assertion fails.
In Quest Browser version 5.0 on undefined
In Opera version 11 on 2010-12-16
In Opera Android version 11 on 2011-03-22
In Safari version 4 on 2009-06-08
In Safari on iOS version 3.2 on 2010-04-03
In Samsung Internet version 1.0 on 2013-04-27
In WebView Android version 4.4 on 2013-12-09
In WebView on iOS version 3.2 on 2010-04-03