On the standards track: Yes
Is Experimental: No
Is Deprecated: No
In Bun version 1.0.0 on 2023-09-08
In Chrome version 36 on 2014-07-16
In Chrome Android version 36 on 2014-07-16
In Deno version 1.0 on 2020-05-13
In Edge version 12 on 2015-07-29
In Firefox version 6 on 2011-08-16 Note: Before Firefox 38, this method threw a TypeError when the key parameter was not an object. This has been fixed in version 38 and later to return false as per the ES2015 standard.
In Firefox for Android version 6 on 2011-08-16 Note: Before Firefox for Android 38, this method threw a TypeError when the key parameter was not an object. This has been fixed in version 38 and later to return false as per the ES2015 standard.
In Internet Explorer version 11 on 2013-10-17
In Node.js version 0.12.0 on 2015-02-06
In Quest Browser version 5.0 on undefined
In Opera version 23 on 2014-07-22
In Opera Android version 24 on 2014-09-10
In Safari version 8 on 2014-10-16
In Safari on iOS version 8 on 2014-09-17
In Samsung Internet version 3.0 on 2015-04-10
In WebView Android version 37 on 2014-09-03
In WebView on iOS version 8 on 2014-09-17