BASELINE NowYouCanUse.com
Newly Available Workers
id: shared-workers

Shared worker

The SharedWorker() constructor runs a script in its own thread, which can send and receive messages with other scripts running at the same origin.
Baseline Status: Achieved Newly Available on May 5, 2026 across core engines.
Desktop Browser Engine Support
Google Chrome
5
Supported
Mozilla Firefox
29
Supported
Apple Safari
16
Supported
Microsoft Edge
79
Supported
Mobile Browser Engine Support
Chrome Android
148
Firefox Android
33
Safari iOS
16
Specifications and References
Specification ↗ Can I Use (sharedworkers) ↗ Feature XML ↗
MDN Browser Compat Data Keys:
api.SharedWorker ↗ api.SharedWorker.SharedWorker ↗ api.SharedWorker.SharedWorker.mime_checks ↗ api.SharedWorker.SharedWorker.options_name_parameter ↗ api.SharedWorker.error_event ↗ api.SharedWorker.port ↗ api.SharedWorkerGlobalScope ↗ api.SharedWorkerGlobalScope.close ↗ api.SharedWorkerGlobalScope.connect_event ↗ api.SharedWorkerGlobalScope.name ↗