Web/API/WebSocket/onerror

The WebSocket interface's onerror event handler property is a function which gets called when an error occurs on the WebSocket.

You can also add an error event handler using addEventListener().

Syntax

webSocket.onerror = eventHandler;

Value

A function or EventHandler which is executed whenever an error event occurs on the WebSocket connection.

Example

webSocket.onerror = function(event) {
  console.error("WebSocket error observed:", event);
};

Specifications

Specification	Status	Comment
HTML Living StandardThe definition of 'WebSocket: onerror' in that specification.	Living Standard	Initial definition

Browser compatibility

The compatibility table on this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request.

Update compatibility data on GitHub

	Desktop						Mobile
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	Android webview	Chrome for Android	Firefox for Android	Opera for Android	Safari on iOS	Samsung Internet
onerror	Chrome Full support Yes	Edge Full support 12	Firefox Full support Yes	IE ?	Opera Full support Yes	Safari Full support Yes	WebView Android Full support Yes	Chrome Android Full support Yes	Firefox Android Full support Yes	Opera Android Full support Yes	Safari iOS Full support Yes	Samsung Internet Android Full support Yes

Legend

Full support  

Full support

Compatibility unknown  

Compatibility unknown

WebSocket.onerror by Mozilla Contributors is licensed under CC-BY-SA 2.5.