On the standards track: Yes
Is Experimental: No
Is Deprecated: No
In Chrome version 40 on 2015-01-21 Note: Before version 43, only service workers are supported. From version 43, all worker types and the main thread are supported.
In Chrome Android version 40 on 2015-01-21 Note: Before version 43, only service workers are supported. From version 43, all worker types and the main thread are supported.
In Deno version 1.26 on 2022-09-29
In Edge version 16 on 2017-10-17
In Firefox version 44 on 2016-01-26
In Firefox for Android version 44 on 2016-01-26
Not in Internet Explorer
In Quest Browser version 5.0 on undefined Note: Before version 5.0, only service workers are supported. From version 5.0, all worker types and the main thread are supported.
In Opera version 27 on 2015-01-27 Note: Before version 30, only service workers are supported. From version 30, all worker types and the main thread are supported.
In Opera Android version 27 on 2015-01-29 Note: Before version 30, only service workers are supported. From version 30, all worker types and the main thread are supported.
In Safari version 11.1 on 2018-04-12
In Safari on iOS version 11.3 on 2018-03-29
In Samsung Internet version 4.0 on 2016-03-11
In WebView Android version 40 on 2015-01-21 Note: Before version 43, only service workers are supported. From version 43, all worker types and the main thread are supported.
In WebView on iOS version 11.3 on 2018-03-29