HTML oninvalid Attribute
Definition and Usage
The oninvalid event occurs when a submittable <input> element is invalid.
For example, the input field is invalid if the required attribute is set and the field is empty (the required attribute specifies that the input field must be filled out before submitting the form).
Applies to
The oninvalid attribute is part of the Event Attributes, and can be used on any HTML elements.
| Elements | Event |
|---|---|
| All HTML elements | oninvalid |
Example
Input Example
Execute a JavaScript when an input field is invalid:
<input type="text" oninvalid="alert('You must fill out the form!');" required>
Try it Yourself »
Browser Support
The numbers in the table specify the first browser version that fully supports the event attribute.
| Event Attribute | |||||
|---|---|---|---|---|---|
| oninvalid | Yes | 10.0 | Yes | Not supported | Yes |
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