Node.js: Server-Side JavaScript Environment
├── Introduction
│   └── What is Node.js?
├── Setting Up Node.js
│   ├── Installation
│   └── Node.js Project Initialization
├── Core Concepts of Node.js
│   ├── Event-Driven Architecture
│   ├── Non-blocking I/O
│   ├── Modules and NPM
│   └── Creating a Basic HTTP Server
├── Advanced Node.js Features
│   ├── Working with File System
│   ├── Building RESTful APIs
│   ├── Real-Time Communication with WebSockets
│   └── Stream API
├── Practical Examples
│   ├── Creating a Simple Web Server
│   ├── Developing a CRUD Application
│   ├── Setting Up a Socket.io Chat App
│   └── Implementing File Uploads
└── Conclusion
    └── The Role of Node.js in Modern Web Development

1. Introduction

What is Node.js?

• Node.js is a JavaScript runtime built on Chrome's V8 JavaScript engine. It's used for developing server-side and networking applications and is known for its non-blocking, event-driven architecture.

2. Setting Up Node.js

Installation

# Install Node.js from the official website or use a version manager like nvm

Node.js Project Initialization

• Setting up a new Node.js project.

mkdir my-node-project
cd my-node-project
npm init -y

3. Core Concepts of Node.js

Event-Driven Architecture

• Understanding the asynchronous, non-blocking nature of Node.js.

const events = require('events');
const eventEmitter = new events.EventEmitter();

// Event listener
eventEmitter.on('myEvent', () => console.log('Event Fired!'));

// Trigger event
eventEmitter.emit('myEvent');

Non-blocking I/O

• Illustrating Node.js's non-blocking I/O model.

const fs = require('fs');

fs.readFile('input.txt', (err, data) => {
  if (err) throw err;
  console.log(data.toString());
});

console.log('Reading file...');

Modules and NPM