BroadcastChannel

The BroadcastChannel interface represents a named channel that any browsing context of a given origin can subscribe to. It allows communication between different documents (in different windows, tabs, frames or iframes) of the same origin. Messages are broadcasted via a message event fired at all BroadcastChannel objects listening to the channel.

Note: This feature is available in Web Workers.

Constructor

BroadcastChannel()
Creates an object linking to the named channel.

Properties

This interface also inherits properties from its parent, EventTarget.

BroadcastChannel.name
Returns a DOMString, the name of the channel.

Event handlers

BroadcastChannel.onmessage
An EventHandler property that specifies the function to execute when a message event is fired on this object.
BroadcastChannel.onmessageerror
An EventHandler called when a MessageEvent of type MessageError is fired—that is, when it receives a message that cannot be deserialized.

Methods

This interface also inherits methods from its parent, EventTarget.

BroadcastChannel.postMessage()
Sends the message, of any type of object, to each BroadcastChannel object listening to the same channel.
BroadcastChannel.close()
Closes the channel object, indicating it won't get any new messages, and allowing it to be, eventually, garbage collected.

Specifications

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

Browser compatibility

Feature Chrome Firefox (Gecko) Internet Explorer Opera Safari
Basic support 54 38 (38) No support 41 No support
Available in workers 54 38 (38) No support 41 No support
onmessageerror 60 57 (57) ? 47 ?
Feature Android Webview Chrome for Android Firefox Mobile (Gecko) IE Mobile Opera Mobile Safari Mobile
Basic support 54 54 38.0 (38) No support 41 No support
Available in workers 54 54 38.0 (38) No support 41 No support
onmessageerror 60 60 57.0 (57) ? 47 ?

See also

Document Tags and Contributors

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