The lastEventId read-only property of the MessageEvent interface is a DOMString representing a unique ID for the event.
var myId = messageEvent.lastEventId;
A DOMString representing the ID.
myWorker.onmessage = function(e) {
result.textContent = e.data;
console.log('Message received from worker');
console.log(e.lastEventId);
};
| Specification | Status | Comment |
|---|---|---|
| Unknown The definition of 'lastEventId' in that specification. | Unknown | Initial definition |
| Feature | Chrome | Edge | Firefox (Gecko) | Internet Explorer | Opera | Safari |
|---|---|---|---|---|---|---|
| Basic support | 1 | (Yes) | 4.0 (2.0) | 9 | ? | 10.0+ |
| Feature | Android | Edge | Firefox Mobile (Gecko) | IE Mobile | Opera Mobile | Safari Mobile |
|---|---|---|---|---|---|---|
| Basic support | ? | (Yes) | ? | ? | ? | 3.0+ |
ExtendableMessageEvent — similar to this interface but used in interfaces that needs to give more flexibility to authors.
© 2005–2018 Mozilla Developer Network and individual contributors.
Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.
https://developer.mozilla.org/en-US/docs/Web/API/MessageEvent/lastEventId