Note: This feature is only available in Dedicated Web Workers.

The DedicatedWorkerGlobalScope object (the Worker 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 also: Functions available to workers.

EventTarget WorkerGlobalScope DedicatedWorkerGlobalScope

Instance properties

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

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

Instance methods

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


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


Sends a message — which can consist of any JavaScript object — to the parent document that first spawned the worker.


Cancels an animation frame request previously scheduled through a call to requestAnimationFrame().


Perform an animation frame request and call a user-supplied callback function before the next repaint.


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


Fired when the worker receives a message from its parent.


Fired when a worker receives a message that can't be deserialized.


Fired when an encoded video or audio frame has been queued for processing by a WebRTC Encoded Transform.


HTML Standard
# dedicated-workers-and-the-dedicatedworkerglobalscope-interface

Browser compatibility

BCD tables only load in the browser

See also