The SharedWorkerGlobalScope object (the SharedWorker global scope) is accessible through the self keyword. Some additional global functions, namespaces objects, and constructors, not typically associated with the worker global scope, but available on it, are listed in the JavaScript Reference. See the complete list of functions available to workers.

EventTarget WorkerGlobalScope SharedWorkerGlobalScope

Instance properties

This interface inherits properties from the WorkerGlobalScope interface, and its parent EventTarget. Read only

The name that the SharedWorker was (optionally) given when it was created using the SharedWorker() constructor. This is mainly useful for debugging purposes.

Instance properties inherited from WorkerGlobalScope


Returns an object reference to the DedicatedWorkerGlobalScope object itself.

WorkerGlobalScope.console Read only

Returns the console object associated with the worker.

WorkerGlobalScope.location Read only

Returns the WorkerLocation associated with the worker. WorkerLocation is a specific location object, mostly a subset of the Location for browsing scopes, but adapted to workers.

WorkerGlobalScope.navigator Read only

Returns the WorkerNavigator associated with the worker. WorkerNavigator is a specific navigator object, mostly a subset of the Navigator for browsing scopes, but adapted to workers.

WorkerGlobalScope.performance Read only Non-standard

Returns the Performance object associated with the worker, which is a regular performance object, but with a subset of its properties and methods available.

Instance methods

This interface inherits methods from the WorkerGlobalScope interface, and its parent EventTarget.


Discards any tasks queued in the SharedWorkerGlobalScope's event loop, effectively closing this particular scope.

Inherited from WorkerGlobalScope

WorkerGlobalScope.dump() Non-standard

Allows you to write a message to stdout — i.e. in your terminal. This is the same as Firefox's window.dump, but for workers.


Imports one or more scripts into the worker's scope. You can specify as many as you'd like, separated by commas. For example: importScripts('foo.js', 'bar.js');

Implemented from other places


Decodes a string of data which has been encoded using base-64 encoding.


Creates a base-64 encoded ASCII string from a string of binary data.


Cancels the repeated execution set using setInterval().


Cancels the repeated execution set using setTimeout().


Schedules the execution of a function every X milliseconds.


Sets a delay for executing a function.


Listen to this event using addEventListener() or by assigning an event listener to the oneventname property of this interface.


Fired on shared workers when a new client connects.


HTML Standard
# shared-workers-and-the-sharedworkerglobalscope-interface

Browser compatibility

BCD tables only load in the browser

See also