The close() method of the SharedWorkerGlobalScope interface discards any tasks queued in the SharedWorkerGlobalScope's event loop, effectively closing this particular scope.




If you want to close your worker instance from inside the worker itself, you can call the following:


close() and self.close() are effectively equivalent — both represent close() being called from inside the worker's inner scope.

Note: There is also a way to stop the worker from the main thread: the Worker.terminate method.


Specification Status Comment
HTML Living Standard
The definition of 'close()' in that specification.
Living Standard

Browser compatibility

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General note: In newer browser versions, close() is available on SharedWorkerGlobalScope and DedicatedWorkerGlobalScope. In older browser versions, it is available on WorkerGlobalScope. This change was made to stop close() being available on service workers, as it isn't supposed to be used there and always throws an exception when called (see bug 1336043).

See also