Web platform features explorer - Shared worker

Web platform features explorer

The SharedWorker() constructor runs a script in its own thread, which can send and receive messages with other scripts running at the same origin.

Status

Baseline Newly Available (since 2026-05-05)

This feature is expected to reach Baseline Widely Available status on: 2028-11-05

MDN documentation

Specifications

HTML (#shared-workers-introduction), from HTML Workstream (WHATWG).

Browser support (view on caniuse.com)

Chrome 5 Released on 2010-05-25
Chrome Android 148 Released on 2026-05-05
Edge 79 Released on 2020-01-15
Firefox 29 Released on 2014-04-29
Firefox for Android 33 Released on 2014-10-14
Safari 16 Released on 2022-09-12
Safari on iOS 16 Released on 2022-09-12

Web Platform Tests (WPT)

View the latest WPT test results for this feature

View as JSON | Edit this feature | Report an issue | Web-features entry: source, dist