Answer
Form validation checks whether entered information follows the rules. • Use types such as `email` plus attributes such as `required`, `min`, and `pattern`. • Prefer native HTML elements before adding custom scripted behavior. • Test the result with a keyboard, a small screen, and browser developer tools.
💡 Simple Example
<input type="email" required>
⚡ Quick Revision
HTML validation catches simple mistakes, but the server must check again.