The source read-only property of the MessageEvent interface is a MessageEventSource (which can be a WindowProxy, MessagePort, or ServiceWorker object) representing the message emitter.
Syntax
let mySource = messageEvent.source;
Value
a MessageEventSource (which can be a WindowProxy, MessagePort, or ServiceWorker object) representing the message emitter.
Example
myWorker.onmessage = function(e) {
result.textContent = e.data;
console.log('Message received from worker');
console.log(e.source);
};
Specifications
| Specification | Status | Comment |
|---|---|---|
| Unknown The definition of 'source' in that specification. |
Unknown | Initial definition |
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 | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
source | Chrome Full support Yes | Edge Full support 12 | Firefox Full support 55 | IE No support No | Opera Full support Yes | Safari Full support Yes | WebView Android Full support Yes | Chrome Android Full support Yes | Edge Mobile ? | Firefox Android Full support 55 | Opera Android Full support Yes | Safari iOS Full support Yes | Samsung Internet Android Full support Yes |
Returns MessageEventSource | Chrome Full support Yes | Edge ? | Firefox Full support 55 | IE No support No | Opera ? | Safari ? | WebView Android ? | Chrome Android ? | Edge Mobile ? | Firefox Android Full support 55 | Opera Android ? | Safari iOS ? | Samsung Internet Android ? |
Legend
- Full support
- Full support
- No support
- No support
- Compatibility unknown
- Compatibility unknown
See also
ExtendableMessageEvent— similar to this interface but used in interfaces that needs to give more flexibility to authors.