javascript.builtins.Object.isFrozen

Spec

MDN URL

Status

On the standards track: Yes

Is Experimental: No

Is Deprecated: No

Browser Support

In Chrome version 6 on 2010-09-02

In Chrome Android version 18 on 2012-06-27

In Deno version 1.0 on 2020-05-13

In Edge version 12 on 2015-07-28

In Firefox version 4 on 2011-03-22

In Firefox for Android version 4 on 2011-03-29

In Internet Explorer version 9 on 2011-03-14

In Node.js version 0.10.0 on 2013-03-11

In Quest Browser version 5.0 on undefined

In Opera version 12 on 2012-06-14

In Opera Android version 12 on 2012-02-25

In Safari version 5.1 on 2011-07-20

In Safari on iOS version 5 on 2011-10-12

In Samsung Internet version 1.0 on 2013-04-27

In WebView Android version 4.4 on 2013-12-09