HTML onblur Attribute
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 |
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