W3cubDocs

GlobalEventHandlers.onblur

The onblur property of the GlobalEventHandlers mixin is the event handler for processing blur events. It's available on Element, Document, and Window.

The blur event is raised when an element loses focus.

Note: The opposite of onblur is onfocus.

Syntax

target.onblur = functionRef;

Value

functionRef is a function name or a function expression. The function receives a FocusEvent object as its sole argument.

Example

This example uses onblur and onfocus to change the text within an <input> element.

HTML

<input type="text" value="CLICK HERE">

JavaScript

let input = document.querySelector('input');

input.onblur = inputBlur;
input.onfocus = inputFocus;

function inputBlur() {
  input.value = 'Focus has been lost';
}

function inputFocus() {
  input.value = 'Focus is here';
}

Result

Try clicking in and out of the form field, and watch its contents change accordingly.

Specifications

Specification
HTML Standard # handler-onblur

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
`onblur`	1	12	9	9	≤12.1	1	1	18	9	≤12.1	1	1.0

In contrast to IE, in which almost all kinds of elements receive the blur event, only a few kinds of elements on Gecko browsers work with this event.