On the standards track: Yes
Is Experimental: No
Is Deprecated: No
In Chrome version 94 on 2021-09-21 Note: Before Chrome 94, outline does not follow the shape of border-radius.
In Chrome Android version 94 on 2021-09-21 Note: Before Chrome Android 94, outline does not follow the shape of border-radius.
In Edge version 94 on 2021-09-24 Note: Before Edge 94, outline does not follow the shape of border-radius.
In Firefox version 88 on 2021-04-19 Note: Before Firefox 88, outline does not follow the shape of border-radius.
In Firefox for Android version 88 on 2021-04-19 Note: Before Firefox for Android 88, outline does not follow the shape of border-radius.
In Internet Explorer version 8 on 2009-03-19
In Quest Browser version 18.0 on 2021-11-30 Note: Before Quest Browser 18.0, outline does not follow the shape of border-radius.
In Opera version 80 on 2021-10-05 Note: Before Opera 80, outline does not follow the shape of border-radius.
In Opera Android version 10.1 on 2010-11-09
In Safari version 16.4 on 2023-03-27 Note: Before Safari 16.4, outline does not follow the shape of border-radius. See bug 20807.
In Safari on iOS version 16.4 on 2023-03-27 Note: Before Safari on iOS 16.4, outline does not follow the shape of border-radius. See bug 20807.
In Samsung Internet version 1.0 on 2013-04-27
In WebView Android version 94 on 2021-09-21 Note: Before Chrome 94, outline does not follow the shape of border-radius.
In WebView on iOS version 16.4 on 2023-03-27 Note: Before WebView on iOS 16.4, outline does not follow the shape of border-radius. See bug 20807.