HTML | oninvalid Event Attribute
The oninvalid event attribute works when an input field values are invalid or empty. The script run when a user clicks on the submit button. The required input field must be filled before submitting it.
Supported Tags:
- <input>
Syntax:
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<element oninvalid = "script">
Attribute Value: This attribute contains single value script which works when oninvalid attribute called. It is supported by all HTML elements.
Example:
html
<!DOCTYPE html><html> <head> <title>oninvalid Event Attribute</title> <style> h1 { color:green; } body { text-align:center; } </style> </head> <body> <h1>GeeksForGeeks</h1> <h2>oninvalid Event Attribute</h2> <form action="#" method="post"> First Name : <input type = "text" oninvalid = alert('Please Fill all input field!') required><br><br> Last Name : <input type = "text" oninvalid = alert('Please Fill all input field!') required><br> <input type="submit" value="Submit"> </form> </body></html> |
Output:
Supported Browsers: The browser supported by oninvalid event attribute are listed below:
- Chrome
- Internet Explorer 10.0
- Firefox
- Opera
