How to Connect Frontend with Backend in MERN Stack - Fix CORS Error & API Calls 🔥
🚀 Learn step by step how to connect frontend with backend in MERN Stack - Fix CORS Error (React, Node.js, Express, MongoDB).
If your React frontend is not talking to your Node.js backend, this video will clear all your doubts!
In this tutorial, you will learn:
✅ MERN Architecture (MongoDB, Express, React, Node.js)
✅ Why React frontend can’t directly connect with backend (port issues)
✅ How to make API calls using Axios
✅ Fixing CORS error in MERN applications
✅ Complete connection setup with testing
🔗 This video is perfect for beginners who want to master MERN Stack and build full stack projects.
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⏱️ *Chapters*
00:00 Intro & Overview
01:25 Understanding MERN Architecture
05:15 The Problem (Port & Connection Issues)
08:45 The Solution Explained
11:26 Step by Step Connection Process
12:00 Backend Setup (Node + Express)
19:40 Frontend Setup (React)
21:55 Axios Setup & API Call
26:14 Understanding the CORS Error in Console
27:45 Setting Up CORS Middleware in Express
30:00 Testing Frontend & Backend Connection
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