×

Save Your Code

If you click the save button, your code will be saved, and you get an URL you can share with others.

By clicking the "Save" button you agree to our terms and conditions.

Report Error

×

Save to Google Drive

If you have a Google account, you can save this code to your Google Drive.

Google will ask you to confirm Google Drive access.

×

Open from Google Drive

If you have saved a file to Google Drive, you can open it here:

Result Size: 625 x 571
×
Change Orientation Save Code Save to Google DriveSave to Google Drive Load from Google DriveLoad from Google Drive Change Theme, Dark/Light
​x
 
<!DOCTYPE html>
<html>
<body>
​
<form action="https://www.w3schools.com/action_page.php" method="get">
  Name: <input type="text" id="myInput" name="fname" pattern=".{6,}" required>
  <input type="submit" value="Submit">
</form>
​
<p>If you submit the form with less than 6 characters, an alert message will occur.</p>
​
<p><strong>Note:</strong> The oninvalid event is not supported in Internet Explorer 9 and earlier or Safari.</p>
​
<script>
document.getElementById("myInput").addEventListener("invalid", myFunction);
​
function myFunction() {
  alert("Must contain 6 or more characters");
}
</script>
​
</body>
​
<!-- Mirrored from www.w3schools.com/jsref/tryit.asp?filename=tryjsref_oninvalid2 by HTTrack Website Copier/3.x [XR&CO'2014], Mon, 27 Jan 2020 03:02:56 GMT -->
</html>
​
×

Report a Problem: