WebSocket: open event
{{APIRef("WebSockets API")}} {{AvailableInWorkers}}
The open event is fired when a connection with a WebSocket is opened.
Syntax
Use the event name in methods like {{domxref("EventTarget.addEventListener", "addEventListener()")}} , or set an event handler property.
addEventListener("open", (event) => {});
onopen = (event) => {};
Event type
A generic {{domxref("Event")}} .
Examples
// Create WebSocket connection.
const socket = new WebSocket("ws://localhost:8080");
// Connection opened
socket.addEventListener("open", (event) => {
socket.send("Hello Server!");
});
Specifications
{{Specifications}}
Browser compatibility
{{Compat}}