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

Browser compatibility

See also

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