Shared worker
Newly Available (since 2026-05-05)
Expected to be Widely Available on 2028-11-05
The SharedWorker() constructor runs a script in its own thread, which can send and receive messages with other scripts running at the same origin.
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
MDN documentation
Specifications
- HTML (#shared-workers-introduction), from HTML Workstream (WHATWG).
Web Platform Tests (WPT)
View the latest WPT test results for this featureView as JSON | Edit this feature | Report an issue | Web-features entry: source, dist