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Form Validation in JavaScript: Easy Beginner Guide Learn how to validate forms using JavaScript and prevent users from submitting incorrect data before it reaches your server. Introduction Forms are everywhere on the internet. Whenever users create an account, log in, reset a password, submit a contact request, or complete a purchase, they interact with forms. But what happens if users enter invalid information? What if they leave required fields empty? What if they enter an invalid email address? This is where form validation becomes important. Form validation checks user input before the form is submitted. It helps improve user experience, prevents mistakes, and reduces invalid data. What Is Form Validation? What It Is Form validation is the process of checking whether user input meets specific rules. Why It Matters Without validation, users could submit incomplete or incorrect information. Real-World Examples Email Validation ...