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 using the SharedWorker() constructor. This is mainly useful for debugging purposes.
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 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: 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 event handler 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.

SharedWorkerGlobalScope.close(): Discards any tasks queued in the SharedWorkerGlobalScope'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

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

Events

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

connect: Fired on shared workers when a new client connects. Also available via the onconnect property.

Specifications

Specification
HTML Standard (HTML) # shared-workers-and-the-sharedworkerglobalscope-interface

Browser compatibility

	Desktop						Mobile
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	WebView Android	Chrome Android	Firefox for Android	Opera Android	Safari on IOS	Samsung Internet
`SharedWorkerGlobalScope`	4	79	29	No	10.6	5	Yes	Yes	29	11	7	Yes
`applicationCache`	4	79	29	No	10.6	No	Yes	Yes	29	Yes	No	Yes
`close`	4	79	29	No	10.6	5	≤37	18	29	11	7	1.0
`connect_event`	4	79	29 Before version 65 the `data` property of the event object was `null`; it is now initialized to an empty string, as per spec.	No	10.6	No	Yes	18	29 Before version 65 the `data` property of the event object was `null`; it is now initialized to an empty string, as per spec.	Yes	No	1.0
`name`	4	79	55	No	10.6	No	Yes	40	55	11	No	4.0
`onconnect`	4	79	29	No	10.6	No	Yes	18	29	Yes	No	1.0