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).
WebSocket: error event
Syntax
Use the event name in methods like addEventListener(), or set an event handler property.
js
addEventListener("error", (event) => {});
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 Standard # dom-websocket-onerror |
Browser compatibility
| Desktop | Mobile | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Chrome | Edge | Firefox | Internet Explorer | Opera | Safari | WebView Android | Chrome Android | Firefox for Android | Opera Android | Safari on IOS | Samsung Internet | |
error_event |
5 | 12 | 7 | 10 | 12.1 | 5 | ≤37 | 18 | 7 | 12.1 | 4.2 | 1.0 |
See also
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https://developer.mozilla.org/en-US/docs/Web/API/WebSocket/error_event