MessageEvent: lastEventId property

{{APIRef("HTML DOM")}}{{AvailableInWorkers}}

The lastEventId read-only property of the {{domxref("MessageEvent")}} interface is a string representing a unique ID for the event.

Value

A string representing the ID.

Examples

myWorker.onmessage = (e) => {
  result.textContent = e.data;
  console.log("Message received from worker");
  console.log(e.lastEventId);
};

Specifications

{{Specifications}}

Browser compatibility

{{Compat}}

See also

• {{domxref("ExtendableMessageEvent")}} — similar to this interface but used in interfaces that needs to give more flexibility to authors.