On the standards track: Yes
Is Experimental: No
Is Deprecated: No
In Chrome version 84 on 2020-07-27
In Chrome Android version 84 on 2020-07-27
In Edge version 84 on 2020-07-16
In Firefox version 92 on 2021-09-07 Note: Implemented as a single object representing a content box size, rather than an array of content box size objects.
In Firefox for Android version 92 on 2021-09-07 Note: Implemented as a single object representing a content box size, rather than an array of content box size objects.
Not in Internet Explorer
In Quest Browser version 11.0 on undefined
In Opera version 70 on 2020-07-27
In Opera Android version 60 on 2020-09-23
In Safari version 15.4 on 2022-03-14
In Safari on iOS version 15.4 on 2022-03-14
In Samsung Internet version 14.0 on 2021-04-17
In WebView Android version 84 on 2020-07-27
In WebView on iOS version 15.4 on 2022-03-14