onfocusout Event

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Example

Execute a JavaScript when an input field is about to lose focus:

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More "Try it Yourself" examples below.

Definition and Usage

The onfocusout event occurs when an element looses focus.

The onfocusout event is often used on input fields.

The onfocosout event is often used with form validation (when the user leaves a form field).

Focus Based Events

Event	Description	Bubbles
focus	An element gets focus	No
blur	An element looses focus	No
focusin	An element gets focus	Yes
focusout	An element looses focus	Yes

Syntax

In HTML:

<element onfocusout="myScript">

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In JavaScript:

object.onfocusout = function(){myScript};

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In JavaScript, using the addEventListener() method:

object.addEventListener("focusout", myScript);

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Technical Details

Bubbles:	Yes
Cancelable:	No
Event type:	FocusEvent
Supported HTML tags:	ALL HTML elements, EXCEPT: <base>, <bdo>, <br>, <head>, <html>, <iframe>, <meta>, <param>, <script>, <style>, and <title>
DOM Version:	Level 2 Events

Browser Support

onfocusout is a DOM Level 2 (2001) feature.

It is fully supported in all browsers:


Chrome	Edge	Firefox	Safari	Opera	IE
Yes	Yes	Yes	Yes	Yes	9-11

More Examples

Example

Using onfocus and onblur:

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Example

Clear input field on focus:

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Example

Event delegation: using focus and blur events:

Set useCapture parameter of addEventListener() to true:

<form id="myForm">
<input type="text" id="myInput">
</form>

<script>
let x = document.getElementById("myForm");
x.addEventListener("focus", myFocusFunction, true);
x.addEventListener("blur", myBlurFunction, true);

function myFocusFunction() {
document.getElementById("myInput").style.backgroundColor = "yellow";
}

function myBlurFunction() {
document.getElementById("myInput").style.backgroundColor = "";
}
</script>

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Example

Event delegation: using focusin and focusout events:

<form id="myForm">
<input type="text" id="myInput">
</form>

<script>
let x = document.getElementById("myForm");
x.addEventListener("focusin", myFocusFunction);
x.addEventListener("focusout", myBlurFunction);

function myFocusFunction() {
document.getElementById("myInput").style.backgroundColor = "yellow";
}

function myBlurFunction() {
document.getElementById("myInput").style.backgroundColor = "";
}
</script>

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