HTML oninvalid Event Attribute
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 »
More "Try it Yourself" examples below.
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).
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 |
Syntax
<element oninvalid="script">
Attribute Values
| Value | Description |
|---|---|
| script | The script to be run on oninvalid |
Technical Details
| Supported HTML tags: | <input> |
|---|
More Examples
Example
Execute a JavaScript when an input field is invalid:
<input type="text" oninvalid="alert('Must contain 6 or more characters');" pattern=".{6,}">
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Related Pages
HTML DOM reference: oninvalid event
❮ HTML Event Attributes
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