DedicatedWorkerGlobalScope

Baseline Widely available *

This feature is well established and works across many devices and browser versions. It’s been available across browsers since ⁨July 2015⁩.

* Some parts of this feature may have varying levels of support.

Note: This feature is only available inDedicated Web Workers.

TheDedicatedWorkerGlobalScope object (theWorker global scope) is accessible through theself keyword. Some additional global functions, namespaces objects, and constructors, not typically associated with the worker global scope, but available on it, are listed in theJavaScript Reference. See also:Functions available to workers.

Instance properties

This interface inherits properties from theWorkerGlobalScope interface, and its parentEventTarget.

DedicatedWorkerGlobalScope.nameRead only: The name that theWorker was (optionally) given when it was created using theWorker() constructor. This is mainly useful for debugging purposes.

Instance methods

This interface inherits methods from theWorkerGlobalScope interface, and its parentEventTarget.

DedicatedWorkerGlobalScope.close(): Discards any tasks queued in theWorkerGlobalScope's event loop, effectively closing this particular scope.
DedicatedWorkerGlobalScope.postMessage(): Sends a message — which can consist ofany JavaScript object — to the parent document that first spawned the worker.
DedicatedWorkerGlobalScope.cancelAnimationFrame(): Cancels an animation frame request previously scheduled through a call torequestAnimationFrame().
DedicatedWorkerGlobalScope.requestAnimationFrame(): Perform an animation frame request and call a user-supplied callback function before the next repaint.

Events

Listen to this event usingaddEventListener() or by assigning an event listener to theoneventname property of this interface.

message: Fired when the worker receives a message from its parent.
messageerror: Fired when a worker receives a message that can't be deserialized.
rtctransform: Fired when an encoded video or audio frame has been queued for processing by aWebRTC Encoded Transform.