The AbstractWorker interface of the Web Workers API abstracts properties and methods common to all kind of workers, being Worker or SharedWorker.


The AbstractWorker interface doesn't inherit any property.

Event handlers

Is an EventListener that is called whenever an ErrorEvent of type error bubbles through the worker.


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


Note that you won't be using the AbstractWorker Interface directly in your code — when called, Worker and SharedWorker inherit its properties. The following code snippet shows creation of a Worker object using the Worker() constructor and usage of the object:

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

first.onchange = function() {
  console.log('Message posted to worker');

For full samples, see:


Specification Status Comment
WHATWG HTML Living Standard
The definition of 'AbstractWorker' in that specification.
Living Standard No change from Web Workers.
Web Workers
The definition of 'AbstractWorker' in that specification.
Candidate Recommendation Initial definition.

Browser compatibility

Feature Chrome Firefox (Gecko) Internet Explorer Opera Safari (WebKit)
Basic support 4 3.5 (1.9.1) 10 10.6 4
Feature Android Firefox Mobile (Gecko) Firefox OS (Gecko) IE Phone Opera Mobile Safari Mobile
Basic support 4.4 1.0 (1.9.1) 1.0.1 10 11.5 5.1

See also


Document Tags and Contributors

 Contributors to this page: fscholz, teoli, Sebastianz, chrisdavidmills
 Last updated by: fscholz,