MessageEvent.source
The source
read-only property of the
MessageEvent
interface is a MessageEventSource
(which can be
a WindowProxy
, MessagePort
, or
ServiceWorker
object) representing the message emitter.
Syntax
let mySource = messageEvent.source;
Value
a MessageEventSource
(which can be a WindowProxy
,
MessagePort
, or ServiceWorker
object) representing the
message emitter.
Example
myWorker.onmessage = function(e) {
result.textContent = e.data;
console.log('Message received from worker');
console.log(e.source);
};
Specifications
Specification | Status | Comment |
---|---|---|
HTML Living Standard The definition of ' MessageEvent: source' in that specification. |
Living Standard |
Browser compatibility
BCD tables only load in the browser
See also
ExtendableMessageEvent
— similar to this interface but used in interfaces that needs to give more flexibility to authors.