The open
event of the EventSource
API is fired when a connection with an event source is opened.
Examples
var evtSource = new EventSource('sse.php');
// addEventListener version
evtSource.addEventListener('open', (e) => {
console.log("The connection has been established.");
});
// onopen version
evtSource.onopen = (e) => {
console.log("The connection has been established.");
};
Specifications
Browser compatibility
| Desktop | Mobile |
---|
| Chrome | Edge | Firefox | Internet Explorer | Opera | Safari | Android webview | Chrome for Android | Firefox for Android | Opera for Android | Safari on iOS | Samsung Internet |
---|
open event | 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
See also