Express.js Installation Guide

Express.js is a minimal and flexible Node.js web application framework. Follow these steps to install and set up Express.js:

Prerequisites

Ensure you have the latest Node.js installed. Download it from Node.js.

To check your Node.js & npm version:

node -v  # Should show Node.js version (e.g., v18.x or higher)
npm -v   # Should show npm version (e.g., 9.x or higher)

Create a New Project

Open the terminal and type this command with your project name:

mkdir my-project && cd my-project

Then, open the project folder with VS Code:

code .

NPM Initialize in the Project

npm init -y

This creates a package.json file.

Install Express.js

npm install express

Create an index.js Example File

const express = require("express");
const app = express();

app.get("/", (req, res) => {
  res.send("Hello, World!");
});

app.listen(3000, () => {
  console.log("Server is running on port 3000");
});

Run the Server

Modify the package.json file in your project and update the scripts section:

"scripts": {
    "dev": "node index.js",
    "build": "node index.js"
},

To run the Node.js server, execute the following command:

npm run dev   # Development Mode
npm run build # Production Mode

Open http://localhost:3000/ in a browser to see the output.

📄 License

This project is licensed under the MIT License - see the LICENSE file for details.

🤝 Contributing

Pull requests are welcome. For major changes, please open an issue first to discuss what you would like to change.