HTML form validation can be handled automatically by the browser.
If a form field (such as fname) is empty, the required attribute will prevent the form from being submitted.
| <form action=”/action_page.php” method=”post”> <input type=”text” name=”fname” required> <input type=”submit” value=”Submit”> </form> |
Data validation ensures that user input is accurate, clean, and meaningful.
Common validation tasks include:
The main goal of data validation is to ensure accurate user input using various methods and approaches.
Server-side validation happens on the server after submission, while client-side validation occurs in the browser before submission.