On the standards track: Yes
Is Experimental: No
Is Deprecated: No
In Chrome version 117 on 2023-09-12
In Chrome Android version 117 on 2023-09-12
In Edge version 117 on 2023-09-15
In Firefox version 116 on 2023-08-01
In Firefox for Android version 116 on 2023-08-01
Not in Internet Explorer
Not in Quest Browser
In Opera version 103 on 2023-10-03
In Opera Android version 78 on 2023-10-23
In Safari version 17 on 2023-09-18 Note: Supports 'Autonomous custom elements' but not 'Customized built-in elements'.
In Safari on iOS version 17 on 2023-09-18 Note: Supports 'Autonomous custom elements' but not 'Customized built-in elements'.
In Samsung Internet version 24.0 on 2024-01-25
In WebView Android version 117 on 2023-09-12
In WebView on iOS version 17 on 2023-09-18 Note: Supports 'Autonomous custom elements' but not 'Customized built-in elements'.