The onopen
property of the EventSource
interface is an EventHandler
called when an open
event is received, that is when the connection was just opened.
Syntax
eventSource.onopen = function
Examples
evtSource.onopen = function() {
console.log("Connection to server opened.");
};
Note: You can find a full example on GitHub — see Simple SSE demo using PHP.
Specifications
Specification | Status | Comment |
HTML Living StandardThe definition of 'onopen' 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 | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
onopen
|
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
EventSource.onopen by Mozilla Contributors is licensed under CC-BY-SA 2.5.