BroadcastChannel.onmessage

This is an experimental technology
Because this technology's specification has not stabilized, check the compatibility table for the proper prefixes to use 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 spec 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 Not supported 38 (38) Not supported Not supported Not supported
Available in workers Not supported 38 (38) Not supported Not supported Not supported
Feature Android Chrome for Android Firefox Mobile (Gecko) IE Mobile Opera Mobile Safari Mobile
Basic support Not supported Not supported 38.0 (38) Not supported Not supported Not supported
Available in workers Not supported Not supported 38.0 (38) Not supported Not supported Not supported

See also

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

License

© 2016 Mozilla Contributors
Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.
https://developer.mozilla.org/en-us/docs/web/api/broadcastchannel/onmessage