MessageEvent: source property
Baseline Widely available
This feature is well established and works across many devices and browser versions. It’s been available across browsers since July 2015.
Note: This feature is available inWeb Workers.
Thesource read-only property of theMessageEvent interface is aMessageEventSource (which can beaWindowProxy,MessagePort, orServiceWorker object) representing the message emitter.
Value
aMessageEventSource (which can be aWindowProxy,MessagePort, orServiceWorker object) representing themessage emitter.
Examples
js
myWorker.onmessage = (e) => { result.textContent = e.data; console.log("Message received from worker"); console.log(e.source);};Specifications
| Specification |
|---|
| HTML # dom-messageevent-source-dev |
Browser compatibility
See also
ExtendableMessageEvent— similar to this interface but used ininterfaces that needs to give more flexibility to authors.