WorkerGlobalScope

« WorkerGlobalScope

The WorkerGlobalScope is an interface representing the scope of any worker. Workers having no browsing context, this scope contains the information usually conveyed by the Window objects, like event handlers, the console or the associated WorkerNavigator object. Each WorkerGlobalScope has its own event loop.

This interface is usually specialized by each worker type: DedicatedWorkerGlobalScope for dedicated workers, SharedWorkerGlobalScope for shared workers, and ServiceWorkerGlobalScope. The self property returns the specialized scope for each context.

Properties

This interface inherits properties from the EventTarget interface and implements properties from WindowTimers, WindowBase64, and WindowEventHandlers.

WorkerGlobalScope.self Read only

Returns a reference to the WorkerGlobalScope itself. Most of the time it is a specific scope like DedicatedWorkerGlobalScope,  SharedWorkerGlobalScope or ServiceWorkerGlobalScope.

WorkerGlobalScope.console Read only

Returns the Console associated with the worker.

WorkerGlobalScope.location Read only

Returns the WorkerLocation associated with the worker. It 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. It 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 associated with the worker. Also it is the regular performance object, only a subset of its property and methods are available to workers.

Methods

This interface inherits methods from the EventTarget interface and implements methods from WindowTimers, WindowBase64, and WindowEventHandlers.

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 each X milliseconds.

WindowTimers.setTimeout()

Sets a delay for executing a function.

WorkerGlobalScope.close()

 

WorkerGlobalScope.dump()

Writes a message to the console.

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');

Event Handlers

This interface inherits event handlers from the EventTarget interface and implements event handlers from WindowTimers, and WindowBase64.

WorkerGlobalScope.onerror

Is an EventHandler representing the code to be called when the error event is raised.

WorkerGlobalScope.onoffline

Is an EventHandler representing the code to be called when the offline event is raised.

WorkerGlobalScope.ononline

Is an EventHandler representing the code to be called when the online event is raised.

WorkerGlobalScope.onclose

Is an EventHandler representing the code to be called when the close event is raised.

Specifications

Browser compatibility

See also

• Other global object interface: Window, DedicatedWorkerGlobalScope, , SharedWorkerGlobalScope, , ServiceWorkerGlobalScope
• Other Worker-related interfaces: Worker, WorkerLocation, and WorkerGlobalScope.
• Using web workers.