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ServiceWorkerGlobalScope.onmessage

The ServiceWorkerGlobalScope.onmessage event of the ServiceWorkerGlobalScope interface is called whenever incoming messages are received.

Note: Messages sent to service worker contexts (e.g. as the event object of onmessage) are represented by MessageEvent objects in modern browsers, for consistency with other web messaging features. (They used to be represented by ServiceWorkerMessageEvent objects, which have now been deprecated.)

Syntax

ServiceWorkerGlobalScope.onmessage = function(MessageEvent) { ... }

Example

self.addEventListener('message', function(messageEvent) {
  console.log('Handling message event:', messageEvent);
}

Specifications

Specification Status Comment
Service Workers
The definition of 'Event Handlers' in that specification.
Working Draft Initial definition

Browser compatibilityUpdate compatibility data on GitHub

Desktop
Chrome Edge Firefox Internet Explorer Opera Safari
Basic support 40 ? 44
44
Service workers (and Push) have been disabled in the Firefox 45 and 52 Extended Support Releases (ESR).
No 24 11.1
Mobile
Android webview Chrome for Android Edge Mobile Firefox for Android Opera for Android iOS Safari Samsung Internet
Basic support 40 40 ? 44 24 11.1 4.0

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Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.
https://developer.mozilla.org/en-US/docs/Web/API/ServiceWorkerGlobalScope/onmessage