On the standards track: Yes
Is Experimental: No
Is Deprecated: No
In Bun version 1.0.0 on 2023-09-08
In Chrome version 63 on 2017-12-06
In Chrome Android version 63 on 2017-12-05
In Deno version 1.8 on 2021-03-02
In Edge version 18 on 2018-10-02
In Firefox version 58 on 2018-01-23
In Firefox for Android version 58 on 2018-01-22
Not in Internet Explorer
In Node.js version 13.0.0 on 2019-10-10 Note: Before version 13.0.0, only the locale data for en-US is available by default. When other locales are specified, the PluralRules instance silently falls back to en-US. To make full ICU (locale) data available before version 13, see Node.js documentation on the --with-intl option and how to provide the data.
In Quest Browser version 5.0 on undefined
In Opera version 50 on 2018-01-04
In Opera Android version 46 on 2018-05-14
In Safari version 13 on 2019-09-19
In Safari on iOS version 13 on 2019-09-19
In Samsung Internet version 8.0 on 2018-07-18
In WebView Android version 63 on 2017-12-05
In WebView on iOS version 13 on 2019-09-19