On the standards track: Yes
Is Experimental: No
Is Deprecated: No
In Chrome version 24 on 2013-01-10
In Chrome Android version 25 on 2013-02-27
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 29 on 2014-04-29
In Firefox for Android version 56 on 2017-09-28
In Internet Explorer version 11 on 2013-10-17
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 15 on 2013-07-02
In Opera Android version 14 on 2013-05-21
In Safari version 10 on 2016-09-20
In Safari on iOS version 10 on 2016-09-13
In Samsung Internet version 1.5 on 2013-09-25
In WebView Android version 4.4 on 2013-12-09
In WebView on iOS version 10 on 2016-09-13