Window: focus event

Baseline Widely available

This feature is well established and works across many devices and browser versions. It’s been available across browsers since July 2015.

The focus event fires when an element has received focus.

The opposite of focus is blur.

This event is not cancelable and does not bubble.

Syntax

Use the event name in methods like addEventListener(), or set an event handler property.

js
addEventListener("focus", (event) => {});

onfocus = (event) => {};

Event type

Event properties

This interface also inherits properties from its parent UIEvent, and indirectly from Event.

FocusEvent.relatedTarget

An EventTarget representing a secondary target for this event. In some cases (such as when tabbing in or out a page), this property may be set to null for security reasons.

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

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

CSS

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

JavaScript

js
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
UI Events
# event-type-focus
HTML
# handler-onfocus

Browser compatibility

Report problems with this compatibility data on GitHub
desktopmobile
Chrome
Edge
Firefox
Opera
Safari
Chrome Android
Firefox for Android
Opera Android
Safari on iOS
Samsung Internet
WebView Android
WebView on iOS
focus event

Legend

Tip: you can click/tap on a cell for more information.

Full support
Full support
See implementation notes.

See also

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