A full-stack JWT authentication system built with React.js frontend and Node.js/Express.js backend, featuring MongoDB Atlas cloud database integration.
https://img.shields.io/badge/JWT-Authentication-blue https://img.shields.io/badge/Database-Cloud%2520MongoDB-green https://img.shields.io/badge/Frontend-React%252018-blue https://img.shields.io/badge/Backend-Node.js%252FExpress-green
✨ Features
✅ User Registration & Login
✅ JWT Token-based Authentication
✅ Protected Routes & Middleware
✅ Password Hashing with bcryptjs
✅ MongoDB Atlas Cloud Database
✅ React Context API for State Management
✅ Responsive UI with Modern Design
✅ Auto-login with localStorage
✅ User Profile Management
✅ Secure Logout
🛠 Tech Stack Frontend React.js 18 - UI Framework
Axios - HTTP Client
Context API - State Management
CSS3 - Styling with Modern Features
Backend Node.js - Runtime Environment
Express.js - Web Framework
MongoDB Atlas - Cloud Database
Mongoose - ODM for MongoDB
JWT - JSON Web Tokens
bcryptjs - Password Hashing
CORS - Cross-Origin Resource Sharing
🚀 Quick Start Prerequisites Node.js (v14 or higher)
MongoDB Atlas account (free tier)
Git
Installation Clone the repository
git clone https://github.com/your-username/jwt-auth-project.git cd jwt-auth-project
cd jwt-auth-backend
npm install
cp .env.example .env
cd ../jwt-auth-frontend
npm install
npm start
⚙️ Environment Configuration Backend (.env)
PORT=5000 "mongodb+srv://username:NEW_PASSWORD@cluster0.yoagdzs.mongodb.net/..." JWT_SECRET=your_super_secret_jwt_key JWT_EXPIRE=30d NODE_ENV=development CORS_ORIGIN=http://localhost:3000
🗄️ API Endpoints Method Endpoint Description Access POST /api/auth/register Register new user Public POST /api/auth/login User login Public GET /api/auth/profile Get user profile Protected GET /health Server health check Public
Example Requests
Register User
curl -X POST http://localhost:5000/api/auth/register
-H "Content-Type: application/json"
-d '{
"username": "testuser",
"email": "test@example.com",
"password": "password123"
}'
Login User
curl -X POST http://localhost:5000/api/auth/login
-H "Content-Type: application/json"
-d '{
"email": "test@example.com",
"password": "password123"
}'
🎨 UI Components Authentication Forms Login Form: Email and password authentication
Register Form: Username, email, and password registration
Form Validation: Client-side validation with error messages
User Interface Navbar: Dynamic navigation with user dropdown
Profile Page: User information and account settings
Responsive Design: Mobile-first approach
🔒 Security Features JWT tokens with expiration
Password hashing using bcryptjs
Protected API routes with middleware
CORS configuration
Input validation and sanitization
Secure HTTP headers
📱 Browser Support Chrome (recommended)
Firefox
Safari
Edge
Note: Some ad blockers may interfere with localhost API calls. Use incognito mode or disable extensions if needed.
🚨 Troubleshooting Common Issues MongoDB Connection Error
Check MongoDB Atlas connection string
Verify IP whitelist in Atlas dashboard
Ensure database user credentials are correct
CORS Errors
Verify frontend URL in backend CORS configuration
Check environment variables
JWT Token Issues
Verify JWT_SECRET in environment variables
Check token expiration settings
Port Already in Use
Change PORT in .env file
Update frontend API_URL accordingly
Debug Mode Enable debug logging by setting NODE_ENV=development in backend .env file.
🤝 Contributing Fork the project
Create your feature branch (git checkout -b feature/AmazingFeature)
Commit your changes (git commit -m 'Add some AmazingFeature')
Push to the branch (git push origin feature/AmazingFeature)
Open a Pull Request
👥 Authors John Titor - johntitortheprogrammer@gmail.com
🙏 Acknowledgments MongoDB Atlas for free cloud database tier
React and Node.js communities
JWT.io for authentication standards
📞 Support For support, email johntitortheprogrammer@gmail.com or create an issue in the repository.
⭐ Don't forget to star this repository if you found it helpful!