The onmessage property of the EventSource interface is an EventHandler called when a message event is received, that is when a message is coming from the source.
Event objects of onmessage event handers are of type MessageEvent.
Syntax
eventSource.onmessage = function
Examples
evtSource.onmessage = function(e) {
var newElement = document.createElement("li");
newElement.textContent = "message: " + e.data;
eventList.appendChild(newElement);
}
Note: You can find a full example on GitHub — see Simple SSE demo using PHP.
Specifications
| Specification | Status | Comment |
|---|---|---|
| HTML Living Standard The definition of 'onmessage' in that specification. |
Living Standard | 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 | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
onmessage | Chrome Full support 6 | Edge Full support 79 | Firefox Full support 6 | IE No support No | Opera Full support Yes | Safari Full support 5 | WebView Android Full support Yes | Chrome Android Full support 18 | Firefox Android Full support 45 | Opera Android Full support 12 | Safari iOS Full support 5 | Samsung Internet Android Full support 1.0 |
Legend
- Full support
- Full support
- No support
- No support