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 Standard The 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.
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