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The focus event fires when an element has received focus. The main difference between this event and focusin is that focusin bubbles while focus does not.

The opposite of focus is blur.

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

Examples

Simple example

HTML

<form id="form">
  <input type="text" placeholder="text input">
  <input type="password" placeholder="password">
</form>

JavaScript

const password = document.querySelector('input[type="password"]');

password.addEventListener('focus', (event) => {
  event.target.style.background = 'pink';    
});

password.addEventListener('blur', (event) => {
  event.target.style.background = '';    
});

Result

Event delegation

There are two ways of implementing event delegation for this event: by using the focusout event, or by setting the useCapture parameter of addEventListener() to true.

HTML

<form id="form">
  <input type="text" placeholder="text input">
  <input type="password" placeholder="password">
</form>

JavaScript

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

form.addEventListener('focus', (event) => {
  event.target.style.background = 'pink';    
}, true);

form.addEventListener('blur', (event) => {
  event.target.style.background = '';    
}, true);

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 AndroidEdge MobileFirefox for AndroidOpera for AndroidSafari on iOSSamsung Internet
focus eventChrome Full support YesEdge 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 YesSafari Full support YesWebView Android Full support YesChrome Android Full support YesEdge Mobile Full support YesFirefox Android Full support YesOpera Android Full support YesSafari iOS Full support YesSamsung Internet Android Full support Yes

Legend

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

See also

Document Tags and Contributors

Last updated by: mfuji09,