WebSocket: open event
The open event is fired when a connection with a WebSocket is opened.
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
// Create WebSocket connection.
const socket = new WebSocket('ws://localhost:8080');
// Connection opened
socket.addEventListener('open', (event) => {
socket.send('Hello Server!');
});
Specifications
| Specification |
|---|
| WebSockets Standard # dom-websocket-onopen |
Browser compatibility
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