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 asfunction(event) {...}
. An event handler always has one single parameter, containing the event, here of typeMessageEvent
.
Example
bc.onmessage = function(ev) { console.log(`message event received! '${ev.data}'`); };
Specifications
Specification | Status | Comment |
---|---|---|
HTML Living Standard The definition of 'BroadcastChannel.onmessage' in that specification. |
Living Standard | Initial definition. |
Browser compatibility
BCD tables only load in the browser
See also
- Another, more heavy weight, way of communicating between browser contexts:
ServiceWorker