BroadcastChannel.onmessage

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
HTML Living Standard
The definition of 'BroadcastChannel.onmessage' in that specification.
Living Standard Initial definition.

Browser compatibility

FeatureChromeEdgeFirefoxInternet ExplorerOperaSafari
Basic support54 ?38 No41 No
FeatureAndroid webviewChrome for AndroidEdge mobileFirefox for AndroidOpera AndroidiOS SafariSamsung Internet
Basic support5454 ? ?41 No6.0

See also

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

Document Tags and Contributors

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