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.

주의: 이 기능은 Web Worker에서 사용할 수 있습니다


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


This interface also inherits properties from its parent, EventTarget. (en-US)
Returns a DOMString, the name of the channel.

Event handlers

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


This interface also inherits methods from its parent, EventTarget.

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


Fired when when a message arrives on the channel.
Also available via the onmessage property.
Fired when a message arrives that can't be deserialized.
Also available via the onmessageerror property.


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

Browser compatibility

BCD tables only load in the browser

See also