Window: focus event

The focus event fires when an element has received focus.

The opposite of focus is blur.

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


Live example

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


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


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


function pause() {
  log.textContent = 'FOCUS LOST!';

function play() {
  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);



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

ChromeEdgeFirefoxInternet ExplorerOperaSafariAndroid webviewChrome for AndroidFirefox for AndroidOpera for AndroidSafari on iOSSamsung Internet
focus eventChrome Full support YesEdge Full support 12Firefox Full support Yes
Full support Yes
No support ? — 24
Notes The interface for this event is Event, not FocusEvent.
IE Full support YesOpera Full support YesSafari Full support YesWebView Android Full support YesChrome Android Full support YesFirefox Android Full support YesOpera Android Full support YesSafari iOS Full support YesSamsung Internet Android Full support Yes


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

See also

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