Getting Started with Node.js and npm

Introduction to Node.js

Node.js is a JavaScript runtime built on Chrome's V8 JavaScript engine that allows developers to create scalable and high-performance server-side applications. To get started with Node.js, you need to have it installed on your computer.

Step 1: Install Node.js and npm

You can download the latest version of Node.js from the official website. Once installed, open your terminal and type node -v to verify that Node.js is installed correctly.

node -v

Step 2: Create a New Project

Create a new directory for your project and navigate to it in your terminal. Then, run npm init to create a package.json file.

mkdir myproject
cd myproject
npm init

Step 3: Install Dependencies

Install the required dependencies for your project. For example, to install the express framework, run npm install express.

npm install express

Step 4: Create a Server

Create a new file called server.js and add the following code to create a simple server.

const express = require('express');
const app = express();
const port = 3000;
app.get('/', (req, res) => {
  res.send('Hello World!');
});
app.listen(port, () => {
  console.log(`Server started on port ${port}`);
});

Step 5: Run the Server

Run the server by typing node server.js in your terminal.

node server.js

Open your web browser and navigate to http://localhost:3000 to see the 'Hello World!' message.