On the standards track: Yes
Is Experimental: No
Is Deprecated: No
In Chrome version 87 on 2020-11-17
In Chrome Android version 87 on 2020-11-17
In Edge version 87 on 2020-11-19
In Firefox version 70 on 2019-10-22
In Firefox for Android version 79 on 2020-07-28
Not in Internet Explorer Note: This value is not supported, but the default browser behavior is to choose appropriate quotes for the user's language setting
In Quest Browser version 13.0 on undefined
In Opera version 73 on 2020-12-09
In Opera Android version 62 on 2021-02-16
In Safari version 14.1 on 2021-04-26
In Safari on iOS version 14.5 on 2021-04-26
In Samsung Internet version 14.0 on 2021-04-17
In WebView Android version 87 on 2020-11-17
In WebView on iOS version 14.5 on 2021-04-26