Deprecated
This feature is no longer recommended. Though some browsers might still support it, it may have already been removed from the relevant web standards, may be in the process of being dropped, or may only be kept for compatibility purposes. Avoid using it, and update existing code if possible; see the compatibility table at the bottom of this page to guide your decision. Be aware that this feature may cease to work at any time.
The close() method of the WorkerGlobalScope interface discards any tasks queued in the WorkerGlobalScope's event loop, effectively closing this particular scope.
Syntax
self.close();
Example
If you wanted to close your worker instance from inside the worker itself, you could 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 Standard The definition of 'close()' in that specification. |
Living Standard |
Browser compatibility
| Desktop | Mobile | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Basic support | Chrome Full support 4 | Edge ? | Firefox Full support 3.5 | IE Full support Yes | Opera Full support 11.5 | Safari Full support 4 | WebView Android ? | Chrome Android Full support Yes | Edge Mobile ? | Firefox Android Full support 4 | Opera Android ? | Safari iOS ? | Samsung Internet Android Full support Yes |
close() moved to DedicatedWorkerGlobalScope and SharedWorkerGlobalScope | Chrome Full support 52 | Edge ? | Firefox Full support 54 | IE ? | Opera ? | Safari ? | WebView Android ? | Chrome Android Full support 52 | Edge Mobile ? | Firefox Android Full support 54 | Opera Android ? | Safari iOS ? | Samsung Internet Android Full support 6.0 |
Legend
- Full support
- Full support
- Compatibility unknown
- Compatibility unknown
- Non-standard. Expect poor cross-browser support.
- Non-standard. Expect poor cross-browser support.
- Deprecated. Not for use in new websites.
- Deprecated. Not for use in new websites.