The AbstractWorker interface of the Web Workers API is an abstract interface that defines properties and methods that are common to all types of worker, including not only the basic Worker, but also ServiceWorker and SharedWorker. As an abstract class, you don't directly interact with AbstractWorker.

Properties

The AbstractWorker interface doesn't inherit any properties.

Event handlers

AbstractWorker.onerror
An EventListener which is invoked whenever an ErrorEvent of type error bubbles through the worker.

Methods

The AbstractWorker interface doesn't implement or inherit any methods.

Example

As an abstract interface, you won't directly use AbstractWorker in your code. Instead, you'll interact with either Worker or SharedWorker, both of which inherit the properties of AbstractWorker.

This code snippet demonstrates the creation of a new Worker using the Worker() constructor; it also shows how to then send a message to the worker.

var myWorker = new Worker('worker.js');

first.onchange = function() {
  myWorker.postMessage([first.value, second.value]);
  console.log('Message posted to worker');
}

The worker's code is loaded from the file "worker.js". This code assumes that there's an <input> element represented by first; an event handler for the change event is established so that when the user changes the value of first, a message is posted to the worker to let it know.

You can find more examples on the MDN Web Docs GitHub repository:

Specifications

Specification Status Comment
HTML Living Standard
The definition of 'AbstractWorker' in that specification.
Living Standard No change from Unknown.
Unknown
The definition of 'AbstractWorker' in that specification.
Unknown Initial definition.

Browser compatibility

FeatureChromeEdgeFirefoxInternet ExplorerOperaSafari
Basic support4 Yes3.51010.64
onerror4123.51010.64
FeatureAndroid webviewChrome for AndroidEdge mobileFirefox for AndroidOpera AndroidiOS SafariSamsung Internet
Basic support4.418 Yes411.55.1 Yes
onerror4.418 Yes411.55.1 Yes

See also

Document Tags and Contributors

Last updated by: sideshowbarker,