Definition and Usage
The onblur attribute fires the moment that the element loses focus.
Onblur is most often used with form validation code (e.g. when the user leaves a form field).
Tip: The onblur attribute is the opposite of the onfocus attribute.
Applies to
The onblur attribute is part of the Event Attributes, and can be used on any HTML elements.
| Elements | Event |
|---|---|
| All HTML elements | onblur |
Example
Validate an input field when the user leaves it:
<input type="text" name="fname" id="fname" onblur="myFunction()">
Try it Yourself »
Browser Support
| Event Attribute | |||||
|---|---|---|---|---|---|
| onblur | Yes | Yes | Yes | Yes | Yes |