Cookie Login System

A lightweight authentication system built with vanilla HTML, CSS, and JavaScript to demonstrate session persistence using browser cookies.

This project is for educational purposes. Storing user credentials directly in cookies on the client-side is insecure and should never be done in production. Always use server-side authentication and secure session management.

Features

• Login and Signup functionality.
• User profile page (protected route).
• Cookie-based authentication persistence.
• Form validation and error handling.
• Responsive design.

How it Works

• Signup: User data is stored in a cookie named app_users.
• Login: Validates credentials against stored data and sets an active_user session cookie.
• Session: The system checks for the active_user cookie to handle redirects and protect the profile page.
• Logout: Clears the session cookie and redirects to the login page.