EventSource: open event
The open
event of the EventSource
API is fired when a connection with an event source is opened.
This event is not cancelable and does not bubble.
Syntax
Use the event name in methods like addEventListener()
, or set an event handler property.
addEventListener('open', event => { });
onopen = event => { };
Event type
A generic Event
.
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
Specification |
---|
HTML Standard # event-open |
Browser compatibility
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