Node.js Overview

📘 What is Node.js?

Node.js is a JavaScript runtime built on Chrome's V8 engine. It allows developers to run JavaScript on the server and build fast, scalable network applications.

⚡ Key Features

• Non-blocking, event-driven architecture
• Single-threaded runtime with asynchronous I/O
• Built-in package manager with npm
• Rich ecosystem for web servers and tooling
• Excellent for APIs, microservices, and CLI tools
• Supports real-time applications with WebSockets

⚠️ Considerations

• Callback-heavy patterns can be hard to manage without async/await
• Single-threaded model requires careful CPU-bound work handling
• Version management across projects can be challenging
• Requires security attention for server-side code

💻 Code Example

import http from 'http';

const server = http.createServer((req, res) => {
  res.writeHead(200, { 'Content-Type': 'text/plain' });
  res.end('Hello from Node.js!');
});

server.listen(3000);