MessageEvent: source property
Baseline
Widely available
This feature is well established and works across many devices and browser versions. It’s been available across browsers since July 2015.
Note: This feature is available in Web Workers.
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.
Value
a MessageEventSource (which can be a WindowProxy,
MessagePort, or ServiceWorker object) representing the
message emitter.
Examples
js
myWorker.onmessage = (e) => {
result.textContent = e.data;
console.log("Message received from worker");
console.log(e.source);
};
Specifications
| Specification |
|---|
| HTML # dom-messageevent-source-dev |
Browser compatibility
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See also
ExtendableMessageEvent— similar to this interface but used in interfaces that needs to give more flexibility to authors.