BroadcastChannel.onmessage

This is an experimental technology
Because this technology's specification has not stabilized, check the compatibility table for usage in various browsers. Also note that the syntax and behavior of an experimental technology is subject to change in future versions of browsers as the specification changes.

The BroadcastChannel.onmessage event handler is a property that specifies the function to execute when a message event, of type MessageEvent, is received by this BroadcastChannel. Such an event is sent by the browser with a message broadcasted to the channel.

Note: This feature is available in Web Workers.

Syntax

channel.onmessage = function;

Values

  • function is the name of a user-defined function, without the () suffix or any parameters, or an anonymous function declaration, such as function(event) {...}. An event handler always has one single parameter, containing the event, here of type MessageEvent.

Example

bc.onmessage = function(ev) { console.log("message event received!"); };

Specifications

Specification Status Comment
WHATWG HTML Living Standard
The definition of 'BroadcastChannel.onmessage' in that specification.
Living Standard Initial definition.

Browser compatibility

Feature Chrome Firefox (Gecko) Internet Explorer Opera Safari
Basic support 54.0 38 (38) No support 41 No support
Available in workers 54.0 38 (38) No support 41 No support
Feature Android Android Webview Firefox Mobile (Gecko) IE Mobile Opera Mobile Safari Mobile Chrome for Android
Basic support No support No support 38.0 (38) No support 41 No support 54.0
Available in workers No support No support 38.0 (38) No support 41 No support 54.0

See also

  • Another, more heavy weight, way of communicating between browser contexts: ServiceWorker

Document Tags and Contributors

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