Overview

Day 71 marks the beginning of the backend journey. Today's focus: understanding what Node.js is, how npm works, and how to work with basic modules. Also created the first Express server.

What I Learned Today

• What Node.js is and why it's used in backend development
• How npm works and how to initialize a project
• How to install and use packages
• Understanding CommonJS modules (require, module.exports)
• How to create a simple Express server

Key Concepts

Node.js

• JavaScript runtime that allows JS to run outside the browser
• Built on Chrome's V8 engine

npm (Node Package Manager)

• Helps install external libraries
• Command: npm init -y
• Install a package: npm install express

Modules

• Import module: const express = require("express")