Getting Started with Node.js

Node.js has become one of the most popular JavaScript runtimes for backend development. In this guide, we’ll explore the fundamentals that will set you up for success.

What is Node.js?

Node.js is an open-source, cross-platform runtime environment that allows you to run JavaScript outside of a browser. It was created by Ryan Dahl in 2009 and has since become a cornerstone of modern web development.

Installation

To get started, download Node.js from the official website. It includes npm (Node Package Manager) by default.

System Requirements

• 64-bit operating system
• 512 MB RAM minimum
• 50 MB free disk space

Your First Program

Create a file called hello.js:

console.log('Hello, Node.js!');

Run it with:

node hello.js

You’ll see the output appear in your terminal immediately!

Understanding npm

npm is the package manager for Node.js. It allows you to install and manage dependencies for your projects.

npm init -y
npm install express

Common Node.js Use Cases

1. Web Development - Build REST APIs and web servers
2. Real-time Applications - WebSockets and streaming
3. Command-line Tools - Create powerful CLI applications
4. Automation - Build build tools and task runners
5. IoT Projects - Control hardware and sensors

Popular Frameworks

• Express.js - Lightweight web framework
• Fastify - High-performance framework
• NestJS - Full-featured framework with TypeScript support
• Koa - Minimalist framework for the modern era

Next Steps

1. Learn about npm and packages
2. Explore the Node.js core modules
3. Build a simple web server
4. Learn about async/await patterns
5. Master middleware concepts

Conclusion

Node.js opens up incredible possibilities for JavaScript developers. Start small, build projects, and gradually tackle more complex challenges. Happy coding!