Element: focus event

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  1. Examples
  2. Specifications
  3. Browser compatibility
  4. See also

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

We're converting our compatibility data into a machine-readable JSON format. This compatibility table still uses the old format, because we haven't yet converted the data it contains. Find out how you can help!
Feature Chrome Edge Firefox (Gecko) Internet Explorer Opera Safari
Basic support (Yes) (Yes) (Yes) (Yes) (Yes) (Yes)
Feature Android Chrome for Android Edge Firefox Mobile (Gecko) IE Mobile Opera Mobile Safari Mobile
Basic support ? ? (Yes) ? ? ? ?

The interface was Event prior to Firefox 24. (bug 855741)

See also

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