Web/API/BroadcastChannel/postMessage

The BroadcastChannel.postMessage() sends a message, which can be of any kind of Object, to each listener in any browsing 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.

Syntax

var str = channel.postMessage(object);

Specifications

Specification	Status	Comment
HTML Living StandardThe definition of 'BroadcastChannel.postmessage()' in that specification.	Living Standard	Initial definition.

Browser compatibility

The compatibility table on this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request.

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
postMessage	Chrome Full support 54	Edge Full support ≤79	Firefox Full support 38	IE No support No	Opera Full support 41	Safari No support No	WebView Android Full support 54	Chrome Android Full support 54	Firefox Android ?	Opera Android Full support 41	Safari iOS No support No	Samsung Internet Android Full support 6.0

Legend

Full support  

Full support

No support  

No support

Compatibility unknown  

Compatibility unknown

See also

• BroadcastChannel, the interface it belongs to.

BroadcastChannel.postMessage() by Mozilla Contributors is licensed under CC-BY-SA 2.5.