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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()">
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Browser Support

Event Attribute
onblur Yes Yes Yes Yes Yes