Скачать или смотреть MERN Chat App Part 3 – Socket.IO Backend Setup, MongoDB Models & Test Real-Time Events

📝 Video Description (SEO & Viewer-Focused):
Welcome to Part 3 of our MERN Stack Chat App Course!
In this video, we connect Socket.IO to our Node.js backend, set up MongoDB models, build essential controller logic, and test real-time socket communication like joining rooms and sending messages.

By the end of this part, you’ll have a real-time backend foundation ready for full chat features!

✅ What we’ll do in this episode:

Connect socket.io to the backend server

Create and organize:

UserModel.js

ChatModel.js

MessageModel.js

Add controller functions for chat flow

Use MongoDB + Mongoose to structure data

Handle socket events:

connection, disconnect

join-chat, typing, new-message, etc.

Test socket connection with logs and frontend

🧠 This part sets the stage for our next step — building real-time chat UI in React.

📦 Technologies used:

Node.js + Express

Socket.IO

MongoDB + Mongoose

JavaScript ES6

Postman (optional for testing APIs)

💻 Full Source Code (coming soon)
📽️ Previous Part: [Insert Part 2 link]
📺 Next: Chat UI & Socket.IO in React [Coming soon!]

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