Web/API/XMLHTTPRequest/error event

The error event is fired when the request encountered an error.

Bubbles	No
Cancelable	No
Interface	ProgressEvent
Event handler property	onerror

Examples

Live example

HTML

<div class="controls">
    <input class="xhr success" type="button" name="xhr" value="Click to start XHR (success)" />
    <input class="xhr error" type="button" name="xhr" value="Click to start XHR (error)" />
    <input class="xhr abort" type="button" name="xhr" value="Click to start XHR (abort)" />
</div>

<textarea readonly class="event-log"></textarea>

CSS

.event-log {
    width: 25rem;
    height: 4rem;
    border: 1px solid black;
    margin: .5rem;
    padding: .2rem;
}

input {
    width: 11rem;
    margin: .5rem;
}

JS

const xhrButtonSuccess = document.querySelector('.xhr.success');
const xhrButtonError = document.querySelector('.xhr.error');
const xhrButtonAbort = document.querySelector('.xhr.abort');
const log = document.querySelector('.event-log');

function handleEvent(e) {
    log.textContent = log.textContent + `${e.type}: ${e.loaded} bytes transferred\n`;
}

function addListeners(xhr) {
    xhr.addEventListener('loadstart', handleEvent);
    xhr.addEventListener('load', handleEvent);
    xhr.addEventListener('loadend', handleEvent);
    xhr.addEventListener('progress', handleEvent);
    xhr.addEventListener('error', handleEvent);
    xhr.addEventListener('abort', handleEvent);
}

function runXHR(url) {
    log.textContent = '';

    const xhr = new XMLHttpRequest();
    addListeners(xhr);
    xhr.open("GET", url);
    xhr.send();
    return xhr;  
}

xhrButtonSuccess.addEventListener('click', () => {
    runXHR('https://mdn.mozillademos.org/files/16553/DgsZYJNXcAIPwzy.jpg');
});

xhrButtonError.addEventListener('click', () => {
    runXHR('https://somewhere.org/i-dont-exist');
});

xhrButtonAbort.addEventListener('click', () => {
    runXHR('https://mdn.mozillademos.org/files/16553/DgsZYJNXcAIPwzy.jpg').abort();
});

Specifications

Specification	Status	Comment
XMLHttpRequest	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
error event	Chrome Full support Yes	Edge Full support ≤79	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 ?	Samsung Internet Android Full support Yes

Legend

Full support  

Full support

Compatibility unknown  

Compatibility unknown

See also

• Related events: loadstart, load, progress, loadend, abort
• Monitoring progress

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