Web/API/SharedWorkerGlobalScope/close

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

Syntax

self.close();

Example

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

close();

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.

Specifications

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

Browser compatibility

Update compatibility data on GitHub

	Desktop						Mobile
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	Android webview	Chrome for Android	Firefox for Android	Opera for Android	Safari on iOS	Samsung Internet
`close`	Chrome No support No	Edge No support No	Firefox Full support 54	IE No support No	Opera No support No	Safari ?	WebView Android No support No	Chrome Android No support No	Firefox Android Full support 54	Opera Android No support No	Safari iOS ?	Samsung Internet Android No support No

Legend

Full support: Full support
No support: No support
Compatibility unknown: Compatibility unknown

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).