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

Update compatibility data on GitHub
DesktopMobile
ChromeEdgeFirefoxInternet ExplorerOperaSafariAndroid webviewChrome for AndroidEdge MobileFirefox for AndroidOpera for AndroidiOS SafariSamsung Internet
Basic supportChrome Full support 4Edge Full support YesFirefox Full support 3.5IE Full support 10Opera Full support 10.6Safari Full support 4WebView Android Full support 4.4Chrome Android Full support 18Edge Mobile Full support YesFirefox Android Full support 4Opera Android Full support 11.5Safari iOS Full support 5.1Samsung Internet Android Full support Yes
onerrorChrome Full support 4Edge Full support 12Firefox Full support 3.5IE Full support 10Opera Full support 10.6Safari Full support 4WebView Android Full support 4.4Chrome Android Full support 18Edge Mobile Full support YesFirefox Android Full support 4Opera Android Full support 11.5Safari iOS Full support 5.1Samsung Internet Android Full support Yes

Legend

Full support  
Full support

See also

Document Tags and Contributors

Last updated by: sideshowbarker,