The blur event fires when an element has lost focus.

The opposite of blur is focus.

Bubbles No
Cancelable No
Interface FocusEvent
Event handler property onblur
Sync / Async Sync
Composed Yes

Examples

Live example

This example changes the appearance of a document when it loses focus. It uses addEventListener() to monitor focus and blur events.

HTML

<p id="log">Click on this document to give it focus.</p>

CSS

.paused {
  background: #ddd;
  color: #555;
}

JavaScript

function pause() {
  document.body.classList.add('paused');
  log.textContent = 'FOCUS LOST!';
}

function play() {
  document.body.classList.remove('paused');
  log.textContent = 'This document has focus. Click outside the document to lose focus.';
}

const log = document.getElementById('log');

window.addEventListener('blur', pause);
window.addEventListener('focus', play);

Result

Specifications

Specification Status Comment
UI Events Working Draft Added info that this event is composed.
Document Object Model (DOM) Level 3 Events Specification Obsolete Initial definition

Browser compatibility

Update compatibility data on GitHub
DesktopMobile
ChromeEdgeFirefoxInternet ExplorerOperaSafariAndroid webviewChrome for AndroidFirefox for AndroidOpera for AndroidSafari on iOSSamsung Internet
blur eventChrome Full support 5Edge Full support YesFirefox Full support Yes
Full support Yes
No support ? — 24
Notes
Notes The interface for this event is Event, not FocusEvent.
IE Full support YesOpera Full support 12.1Safari Full support 5.1WebView Android Full support YesChrome Android Full support 18Firefox Android Full support YesOpera Android Full support 12.1Safari iOS Full support 5.1Samsung Internet Android Full support Yes

Legend

Full support  
Full support
See implementation notes.
See implementation notes.

The value of Document.activeElement varies across browsers while this event is being handled (bug 452307): IE10 sets it to the element that the focus will move to, while Firefox and Chrome often set it to the body of the document.

See also

  • Related event: focus
  • This event on Element targets: blur event

Document Tags and Contributors

Contributors to this page: wbamberg, mfuji09, mdnwebdocs-bot
Last updated by: wbamberg,