Unlocking Backend Power: Your First Node.js Server

If you're a frontend developer, the idea of writing backend code might seem daunting. You're used to the browser, the DOM, and CSS. But here's the secret: you already know the language.

Node.js takes JavaScript out of the browser and lets it run on your server. Today, we're going to build your very first HTTP server—the "Hello World" of backend development—using nothing but built-in Node.js modules.

1. The Setup

First, ensure you have Node.js installed. Open your terminal and run:

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node -v

If you see a version number (like v20.10.0), you're ready to go. If not, head over to nodejs.org and grab the LTS version.

2. Writing the Server

Create a new file named server.js. We're going to use the detailed http module that comes pre-packaged with Node. This module gives us low-level access to HTTP requests and responses.

Here is the code:

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const http = require('http'); const hostname = '127.0.0.1';
const port = 3000; const server = http.createServer((req, res) => {
  res.statusCode = 200;
  res.setHeader('Content-Type', 'text/plain');
  res.end('Hello, World! This is my first Node server.\n');
}); server.listen(port, hostname, () => {
  console.log(`Server running at http://${hostname}:${port}/`);
});

Unlocking Backend Power: Your First Node.js Server

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Unlocking Backend Power: Your First Node.js Server

1. The Setup

2. Writing the Server

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3. Running Your Application

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