WebSocket: error event
Baseline
Widely available
This feature is well established and works across many devices and browser versions. It’s been available across browsers since July 2015.
Note: This feature is available in Web Workers.
The error event is fired when a connection with a WebSocket has been closed due to an error (some data couldn't be sent for example).
Syntax
Use the event name in addEventListener():
js
addEventListener("error", (event) => { })
Alternatively, assign to the event handler property of the interface:
js
onerror = (event) => { }
Event type
A generic Event.
Examples
js
// Create WebSocket connection
const socket = new WebSocket("ws://localhost:8080");
// Listen for possible errors
socket.addEventListener("error", (event) => {
console.log("WebSocket error: ", event);
});
Specifications
| Specification |
|---|
| WebSockets # dom-websocket-onerror |