The BroadcastChannel.postMessage() sends a message, which can be of any kind of Object, to each listener in any browser context with the same origin. The message is transmitted as a message event targeted at each BroadcastChannel bound to the channel.

Note: This feature is available in Web Workers.


var str = channel.postMessage(object);


Specification Status Comment
HTML Living Standard
The definition of 'BroadcastChannel.postmessage()' 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

Document Tags and Contributors

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