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

Browser compatibility

FeatureChromeEdgeFirefoxInternet ExplorerOperaSafari
Basic support4 Yes3.51010.64
FeatureAndroid webviewChrome for AndroidEdge mobileFirefox for AndroidOpera AndroidiOS SafariSamsung Internet
Basic support4.44.4 Yes411.55.1 ?
onerror4.44.4 Yes411.55.1 ?

See also


Document Tags and Contributors

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