On the standards track: Yes
Is Experimental: No
Is Deprecated: No
In Bun version 1.0.3 on 2023-09-22
In Chrome version 72 on 2019-01-29
In Chrome Android version 72 on 2019-01-29
In Deno version 1.8 on 2021-03-02
In Edge version 79 on 2020-01-15
In Firefox version 78 on 2020-06-30
In Firefox for Android version 79 on 2020-07-28
Not in Internet Explorer
In Node.js version 12.0.0 on 2019-04-23 Note: Before version 13.0.0, only the locale data for en-US is available by default. See the ListFormat() constructor for more details.
In Quest Browser version 6.0 on undefined
In Opera version 60 on 2019-04-09
In Opera Android version 51 on 2019-03-21
In Safari version 14.1 on 2021-04-26 Note: Only available on macOS Big Sur (11) and above.
In Safari on iOS version 14.5 on 2021-04-26
In Samsung Internet version 11.0 on 2019-12-05
In WebView Android version 72 on 2019-01-29
In WebView on iOS version 14.5 on 2021-04-26