javascript.builtins.Object.preventExtensions.ES2015_behavior

Spec

MDN URL

Status

On the standards track: Yes

Is Experimental: No

Is Deprecated: No

Browser Support

In Chrome version 44 on 2015-07-21

In Chrome Android version 44 on 2015-07-29

In Deno version 1.0 on 2020-05-13

In Edge version 12 on 2015-07-28

In Firefox version 35 on 2015-01-13

In Firefox for Android version 35 on 2015-01-13

In Internet Explorer version 11 on 2013-10-17

In Node.js version 4.0.0 on 2015-09-08

In Quest Browser version 5.0 on undefined

In Opera version 31 on 2015-08-04

In Opera Android version 32 on 2015-09-23

In Safari version 9 on 2015-09-30

In Safari on iOS version 9 on 2015-09-16

In Samsung Internet version 4.0 on 2016-03-11

In WebView Android version 44 on 2015-07-29