ServiceWorkerContainer.onmessage

This is an experimental technology
Check the Browser compatibility table carefully before using this in production.

The onmessage property of the ServiceWorkerContainer interface is an event handler fired whenever a message event occurs — when incoming messages are received to the ServiceWorkerContainer object (e.g., via a MessagePort.postMessage() call).

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

ServiceWorkerContainer.onmessage = function(messageevent) { ... }

Example

navigator.serviceWorker.onmessage = function(messageevent) {
  console.log(`received data: ${messageevent.data}`);
}

Specifications

Specification	Status	Comment
Service Workers The definition of 'ServiceWorkerContainer: onmessage' in that specification.	Working Draft	Initial definition.

Browser compatibility

Update compatibility data on GitHub

	Desktop						Mobile
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	Android webview	Chrome for Android	Firefox for Android	Opera for Android	Safari on iOS	Samsung Internet
`onmessage` Experimental	Chrome Full support 40	Edge Full support 17 Full support 17 Full support 16 Disabled Disabled From version 16: this feature is behind the `Enable service workers` preference.	Firefox Full support 44 Notes Full support 44 Notes Notes Service workers (and Push) have been disabled in the Firefox 45 and 52 Extended Support Releases (ESR).	IE No support No	Opera Full support 27	Safari Full support 11.1	WebView Android Full support 40	Chrome Android Full support 40	Firefox Android Full support 44	Opera Android Full support 27	Safari iOS Full support 11.3	Samsung Internet Android Full support 4.0

Legend

Full support: Full support
No support: No support
Experimental. Expect behavior to change in the future.: Experimental. Expect behavior to change in the future.
See implementation notes.: See implementation notes.
User must explicitly enable this feature.: User must explicitly enable this feature.