web api event
EventSource: open event
Available in workers
The open event of the EventSource interface 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
const 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
SpecificationsStandards references are available on the canonical MDN page.
Browser compatibility
Browser compatibilityCompatibility data is available on the canonical MDN page.