The lastEventId
read-only property of the MessageEvent
interface is a DOMString
representing a unique ID for the event.
Syntax
var myId = messageEvent.lastEventId;
Value
A DOMString
representing the ID.
Example
myWorker.onmessage = function(e) {
result.textContent = e.data;
console.log('Message received from worker');
console.log(e.lastEventId);
};
Specifications
Specification | Status | Comment |
HTML Living StandardThe definition of 'MessageEvent: lastEventId' in that specification. | Living Standard |
Browser compatibility
The compatibility table on this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request.
Update compatibility data on GitHub
Desktop | Mobile | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
lastEventId
|
Chrome
Full support 1 |
Edge
Full support 17 |
Firefox
Full support 4 |
IE
Full support 9 |
Opera
Full support Yes |
Safari
Full support 4 |
WebView Android
Full support Yes |
Chrome Android
Full support Yes |
Firefox Android
Full support Yes |
Opera Android
Full support Yes |
Safari iOS
Full support 3 |
Samsung Internet Android
Full support Yes |
Legend
- Full support
- Full support
See also
ExtendableMessageEvent
— similar to this interface but used in interfaces that needs to give more flexibility to authors.
MessageEvent.lastEventId by Mozilla Contributors is licensed under CC-BY-SA 2.5.