Web/API/XMLHttpRequestEventTarget/onerror

The XMLHttpRequestEventTarget.onerror is the function called when an XMLHttpRequest transaction fails due to an error.

Syntax

XMLHttpRequest.onerror = callback;

Values

• callback is the function to be executed when the request fails.

Example

var xmlhttp = new XMLHttpRequest(),
  method = 'GET',
  url = 'https://developer.mozilla.org/';

xmlhttp.open(method, url, true);
xmlhttp.onerror = function () {
  console.log("** An error occurred during the transaction");
};
xmlhttp.send();

Specifications

Specification	Status	Comment
XMLHttpRequest	Living Standard	WHATWG living standard

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 ≤18	Firefox Full support Yes	IE Full support 10	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

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