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

None.

None (undefined).

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.