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:
Syntax:
<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 10
- Edge 12
- Internet Explorer 10
- Firefox 4
- Opera 10
- Safari 5
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Last Updated :
16 Aug, 2022
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