MessageEvent: source property

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

HTML

See also

ExtendableMessageEvent — similar to this interface but used in interfaces that needs to give more flexibility to authors.