Web/API/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).

Bubbles	No
Cancelable	No
Interface	Event
Event handler property	onerror

Examples

// Create WebSocket connection
const socket = new WebSocket('ws://localhost:8080');

// Listen for possible errors
socket.addEventListener('error', function (event) {
  console.log('WebSocket error: ', event);
});

Specifications

Specification	Status
HTML Living StandardThe definition of 'WebSocket error' in that specification.	Living Standard

Browser compatibility

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
error event	Chrome Full support Yes	Edge Full support 12	Firefox Full support Yes	IE ?	Opera Full support Yes	Safari ?	WebView Android Full support Yes	Chrome Android Full support Yes	Firefox Android Full support Yes	Opera Android ?	Safari iOS ?	Samsung Internet Android Full support Yes

Legend

Full support  

Full support

Compatibility unknown  

Compatibility unknown

See also

• WebSocket: close event
• WebSocket: message event
• WebSocket: open event
• Writing WebSocket client applications

WebSocket: error event by Mozilla Contributors is licensed under CC-BY-SA 2.5.