onfocusout Event
Example
Call a function when an input field is about to lose focus:
<input type="text"
onfocusout="myFunction()">
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More "Try it Yourself" examples below.
Description
The onfocusout event occurs when an element loses 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 | Occurs When |
|---|---|
| focus | An element gets focus |
| blur | An element loses focus |
| focusin | An element gets focus |
| focusout | An element loses focus |
See Also:
Syntax
In JavaScript, using the addEventListener() method:
object.addEventListener("focusout", myScript);
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Technical Details
| Bubbles: | Yes |
|---|---|
| Cancelable: | No |
| Event type: | FocusEvent |
| 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:
<input type="text" onfocus="focusFunction()" onblur="blurFunction()">
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Example
Clear input field on focus:
<input type="text" onfocus="this.value=''" value="Blabla">
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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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