MessageEvent.lastEventId

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
Unknown
The definition of 'lastEventId' in that specification.
Unknown Initial definition

Browser compatibility

FeatureChromeEdgeFirefoxInternet ExplorerOperaSafari
Basic support1 Yes49 ?10
FeatureAndroid webviewChrome for AndroidEdge mobileFirefox for AndroidOpera AndroidiOS SafariSamsung Internet
Basic support ? ? ? ? ?3 ?

See also

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

Document Tags and Contributors

Contributors to this page: fscholz, chrisdavidmills
Last updated by: fscholz,