Login and Registration using MERN Stack | MongoDB, Express.js, React, Node.js

In this tutorial, we’ll build a fully functional Login and Registration system using the MERN stack (MongoDB, Express.js, React, Node.js). We'll implement JWT-based authentication, test our API endpoints in Postman, and display user-specific data like username and email on the homepage after login. This is a practical full-stack auth project ideal for beginners and intermediates alike.

✨ What You'll Learn:

How to set up a structured MERN authentication project.
How to create and test secure RESTful APIs with Express and MongoDB.
How to implement JWT authentication and protect routes.
How to store and access tokens on the frontend.
How to use Axios to connect React with the backend.
How to conditionally render components based on user authentication.
How to use React Router DOM for navigation.
How to test your API endpoints with Postman.

🚀 Key Features:

User registration and login with JWT authentication.
Password hashing for secure user storage.
Protected route to fetch user profile data (/me).
Display logged-in user's username and email on homepage.
Client-side routing using React Router DOM.
Token persistence using localStorage.
Postman-tested backend endpoints.
Clean and minimal UI ready to expand.

🔗 Useful Links:

MongoDB – https://www.mongodb.com/ – NoSQL database
Express.js – https://expressjs.com/ – Web framework for Node.js
React – https://reactjs.org/ – JavaScript library for building UIs
Node.js – https://nodejs.org/ – JavaScript runtime
Postman – https://www.postman.com/ – API testing tool
JWT (JSON Web Token) - https://jwt.io/ – Secure token standard for user authentication

⏱️ Timestamps:
00:00:00 - Project Preview 
00:00:55 - Setting Up the Backend
00:06:29 - Connecting to MongoDB
00:12:21 - Creating User Model & Password Hashing
00:20:24 - Creating Routes
00:31:14 - Adding Middleware
00:44:29 - Testing API endpoints with Postman
00:48:57 - Setting Up the Frontend
00:52:41 - Working with App component
00:58:06 - Working with Login Page
01:13:21 - Working with Register Page
01:15:16 - Working with Home Page
01:20:40 - Working with Navbar component
01:30:37 - Protecting Routes
01:35:40 - Final Words & Project Recap

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📁 Source Code:
Get the full project on GitHub: [https://github.com/WebDevBey/mern-log...]

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