Course Content
NODEJS Tutorial
About Lesson

In the world of Node.js, building web applications is a common task, and one of the most popular frameworks for this purpose is Express. In this post, we will walk you through the process of installing Express and creating a simple Express server to kickstart your web development journey.

Why Express?

Express.js is a minimal and flexible Node.js web application framework that provides a robust set of features to develop web and mobile applications. It simplifies the process of building scalable and maintainable web applications, making it an excellent choice for developers.

Prerequisites:

Before we dive into creating our Express server, make sure you have Node.js installed on your machine. You can download the latest version from the official Node.js website.

Installing Express:

To install Express, open your terminal and run the following command:

npm install express

This will download and install Express and its dependencies.

Setting up Your Project:

Now that Express is installed, create a new directory for your project and navigate into it:

mkdir my-express-app
cd my-express-app

Creating Your Express Server:

Create a file named app.js (or any other preferred name) in your project directory. Open the file in your text editor and let’s start building your server.

// Import the Express module
const express = require('express');

// Create an Express application
const app = express();

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

// Set the port for the server to listen on
const port = 3000;

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

Running Your Server:

Save the changes to app.js and go back to your terminal. Run the following command to start your Express server:

node app.js

Visit http://localhost:3000 in your web browser, and you should see the message “Hello, Express!”.