Element: focus event

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 focusin 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
UI Events
# event-type-focus

Browser compatibility

Desktop Mobile
Chrome Edge Firefox Internet Explorer Opera Safari WebView Android Chrome Android Firefox for Android Opera Android Safari on IOS Samsung Internet
focus_event
1
12
24
6-24
The interface for this event is Event, not FocusEvent.
9
11.6
3.1
1
18
24
6-24
The interface for this event is Event, not FocusEvent.
12.1
2
1.0

See also

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Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.
https://developer.mozilla.org/en-US/docs/Web/API/Element/focus_event