SharedWorkerGlobalScope

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.

Properties

This interface inherits properties from the WorkerGlobalScope interface, and its parent EventTarget, and therefore implements properties from WindowTimers, WindowBase64, and WindowEventHandlers.

SharedWorkerGlobalScope.name Read only
The name that the SharedWorker was (optionally) given when it was created. This is the name that the SharedWorker() constructor can pass to get a reference to the SharedWorkerGlobalScope.
SharedWorkerGlobalScope.applicationCache Read only
This property returns the ApplicationCache object for the worker (see Using the application cache).

Properties inherited from WorkerGlobalScope

WorkerGlobalScope.self
Returns an object reference to the DedicatedWorkerGlobalScope object itself.
WorkerGlobalScope.console Read only
Returns the Console 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
Returns the Performance object associated with the worker, which is a regular performance object, but with a subset of its properties and methods available.

Event handlers

This interface inherits event handlers from the WorkerGlobalScope interface, and its parent EventTarget, and therefore implements event handlers from WindowTimers, WindowBase64, and WindowEventHandlers.

SharedWorkerGlobalScope.onconnect
Is an EventHandler representing the code to be called when the connect event is raised — that is, when a MessagePort connection is opened between the associated SharedWorker and the main thread.

Methods

This interface inherits methods from the WorkerGlobalScope interface, and its parent EventTarget, and therefore implements methods from WindowTimers, WindowBase64, and WindowEventHandlers.

WorkerGlobalScope.close()
Discards any tasks queued in the WorkerGlobalScope's event loop, effectively closing this particular scope.

Inherited from WorkerGlobalScope

WorkerGlobalScope.dump()
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.
WorkerGlobalScope.importScripts()
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

WindowBase64.atob()
Decodes a string of data which has been encoded using base-64 encoding.
WindowBase64.btoa()
Creates a base-64 encoded ASCII string from a string of binary data.
WindowTimers.clearInterval()
Cancels the repeated execution set using WindowTimers.setInterval().
WindowTimers.clearTimeout()
Cancels the repeated execution set using WindowTimers.setTimeout().
WindowTimers.setInterval()
Schedules the execution of a function every X milliseconds.
WindowTimers.setTimeout()
Sets a delay for executing a function.

Specifications

Specification Status Comment
WHATWG HTML Living Standard
The definition of 'SharedWorkerGlobalScope' in that specification.
Living Standard No change from Web Workers.
Web Workers
The definition of 'SharedWorkerGlobalScope' in that specification.
Editor's Draft Initial definition

Browser compatibility

Feature Chrome Firefox (Gecko) Internet Explorer Opera Safari
Support 4 29.0 (29.0) No support 10.60 5
No support 6.1
close() moved from WorkerGlobalScope to SharedWorkerGlobalScope ? 54.0 (54.0) ? ? ?
Feature Android Chrome for Android Firefox Mobile (Gecko) IE Mobile Opera Mobile Safari Mobile
Support No support No support 33.0 (33.0) No support 11.5 5.1
No support 7.1
close() moved from WorkerGlobalScope to SharedWorkerGlobalScope ? ? 54.0 (54.0) ? ? ?

See also

Document Tags and Contributors

 Contributors to this page: chrisdavidmills, Sebastianz, teoli, Iiro, fscholz, kscarfone
 Last updated by: chrisdavidmills,