web api instance property
MessageEvent: source property
Available in 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
myWorker.onmessage = (e) => {
result.textContent = e.data;
console.log("Message received from worker");
console.log(e.source);
};
Specifications
SpecificationsStandards references are available on the canonical MDN page.
Browser compatibility
Browser compatibilityCompatibility data is available on the canonical MDN page.
See also
ExtendableMessageEvent— similar to this interface but used in interfaces that needs to give more flexibility to authors.