Creating a Simple Express.js Application: A Beginner's Tutorial

Creating a Simple Express.js Application: A Beginner's Tutorial

Introduction

Express.js is a fast, unopinionated, and minimalist web framework for Node.js. It is used to build web applications and APIs. In this tutorial, we will create a simple Express.js application.

Prerequisites

  • Node.js installed on your machine
  • Basic understanding of JavaScript
  • An IDE or a code editor like VS Code

Step 1: Setting Up the Project

First, we need to set up a new Node.js project. Open your terminal or command prompt, navigate to the directory where you want to create your project, and type the following:

  1. mkdir my-express-app
  2. cd my-express-app
  3. npm init -y

Step 2: Installing Express.js

After initializing our project, we need to install Express.js. We can do this by typing the following command:

  1. npm install express

Step 3: Creating Our First Route

Create a new file in your project directory named «app.js», and open it in your code editor. Type in the following code:

  1. const express = require('express');
  2. const app = express();
  3. app.get('/', (req, res) => {
  4. res.send('Hello, Express.js!');
  5. });
  6. app.listen(3000, () => {
  7. console.log('Server listening on port 3000');
  8. });

Step 4: Running the Application

Now that we have our simple Express.js application ready, let's run it. Type the following command in your terminal:

  1. node app.js

Conclusion

There you have it! You have successfully created your first simple Express.js application. This is just the beginning; Express.js has a lot more features and capabilities to explore. Happy coding!

We use cookies to improve your browsing experience. By continuing to use this website, you consent to our use of cookies. Learn More