JavaScript oninvalid Event
You are Here:
JavaScript oninvalid Event
The oninvalid event occurs when a submittable element has been checked for validity and doesn't satisfy its constraints.
oninvalid Event as Attribute
Example
HTML Online Editor
<!DOCTYPE html>
<html>
<body>
<p>Type something without '@' and click submit.</p>
<form action="/email.php" method="get">
<input type="email" oninvalid="myFunction()" name="myEmail" required>
<input type="submit" value="Submit">
</form>
<script>
function myFunction(){
alert("Invalid Email Address");
}
</script>
</body>
</html>
Syntax
As Attribute
<element oninvalid = "JavaScript">
As Property
object.oninvalid = function(){
// code
};
Using Event Listener
object.addEventListener("invalid" , myScript);
oninvalid Event as Property
Example
HTML Online Editor
<!DOCTYPE html>
<html>
<body>
<p>Type something without '@' and click submit.</p>
<form action="/email.php" method="get">
<input type="email" name="myEmail" required>
<input type="submit" value="Submit">
</form>
<script>
var x = document.getElementsByTagName("input")[0];
function myFunction(){
alert("Invalid Email Address");
}
x.oninvalid = myFunction;
</script>
</body>
</html>
Using addEventListener() Method
Note: The addEventListener() method is not supported in Internet Explorer 8 and below.
Example
HTML Online Editor
<!DOCTYPE html>
<html>
<body>
<p>Type something without '@' and click submit.</p>
<form action="/email.php" method="get">
<input type="email" name="myEmail" required>
<input type="submit" value="Submit">
</form>
<script>
var x = document.getElementsByTagName("input")[0];
function myFunction(){
alert("Invalid Email Address");
}
x.addEventListener("invalid", myFunction);
</script>
</body>
</html>
Reminder
Hi Developers, we almost covered 97% of JavaScript Tutorials with examples for quick and easy learning.
We are working to cover every Single Concept in JavaScript.
Please do google search for:
Join Our Channel
Join our telegram channel to get an instant update on depreciation and new features on HTML, CSS, JavaScript, jQuery, Node.js, PHP and Python.
This channel is primarily useful for Full Stack Web Developer.
