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WebSocket: error event

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 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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Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.
https://developer.mozilla.org/en-US/docs/Web/API/WebSocket/error_event