HTML oninvalid Event Attribute
HTML oninvalid Event Attribute
The oninvalid event attribute triggers when a submittable element has been checked for validity and doesn't satisfy its constraints.
Example
HTML Online Editor
<!DOCTYPE html>
<html>
<body>
<p>Try to submit the empty form</p>
<form action="/user-name.php">
Name: <input type="text" name="name" oninvalid="myFunction()" required>
<button type="submit">Submit</button>
</form>
<script>
function myFunction(){
alert("Name field should not be empty");
}
</script>
</body>
</html>
Attribute Value
| Value | Explanation |
|---|---|
| script | Script runs when an element is invalid. |
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