Express JS tutorial for beginners

Express.js stands out as a widely-used web application framework designed for Node.js, streamlining the development of robust and scalable web applications. The following tutorial is tailored for beginners, providing a step-by-step guide to kickstart your journey with Express.js:

Step 1: Install Node.js

Make sure you have Node.js installed on your machine. You can download it from Node.js official website.

Step 2: Create a new project folder

Create a new folder for your Express.js project and navigate to it in your terminal:

mkdir express-tutorial
cd express-tutorial

Step 3: Initialize a new Node.js project

Run the following command to initialize a new Node.js project and create a package.json file:

npm init -y

Step 4: Install Express.js

Install Express.js as a dependency for your project:

npm install express

Step 5: Create your Express app

Create a file named app.js in your project folder and open it in your code editor. This will be the main file for your Express app.

// app.js

const express = require('express');
const app = express();
const port = 3000;

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

app.listen(port, () => {
  console.log(`Server is running at http://localhost:${port}`);
});

This simple Express app responds with "Hello, Express!" when you access the root path (/) in your browser.

Step 6: Run your Express app

In your terminal, run the following command to start your Express app:

node app.js

Visit http://localhost:3000 in your web browser, and you should see "Hello, Express!" displayed.