On the standards track: Yes
Is Experimental: No
Is Deprecated: No
In Chrome version 58 on 2017-04-19
In Chrome Android version 58 on 2017-04-25
In Deno version 1.8 on 2021-03-02 Note: Only the locale data for en-US is available.
In Edge version 12 on 2015-07-29
In Firefox version 55 on 2017-08-08
In Firefox for Android version 55 on 2017-08-08
In Internet Explorer version 6 on 2001-08-27
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 function 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 45 on 2017-05-10
In Opera Android version 43 on 2017-09-27
In Safari version 10 on 2016-09-20
In Safari on iOS version 10 on 2016-09-13
In Samsung Internet version 7.0 on 2018-03-16
In WebView Android version 58 on 2017-04-25
In WebView on iOS version 10 on 2016-09-13