Learn the Basics of Express JS: Introduction, Setup, and Writing Your First Program | Complete Node JS Tutorial in Hindi/Urdu – Part 25

In this tutorial, we will learn about Express JS, a popular web application framework for Node.js. Express JS simplifies the process of building web applications by providing a set of tools and features that help you create robust and scalable applications.

What is Express JS?

Express JS is a web application framework for Node.js that provides a simple and elegant way to create web applications. It is built on top of Node.js and provides a set of powerful features that make it easy to create server-side applications.

Setup Express JS

To get started with Express JS, you need to have Node.js installed on your computer. If you do not have Node.js installed, you can download it from the official website (https://nodejs.org/).

Once you have Node.js installed, you can create a new directory for your project and navigate to that directory using the terminal. To install Express JS, you can use npm (Node Package Manager) by running the following command:

npm install express

This command will install Express JS in your project directory and add it to the node_modules folder.

First Express JS Program

Now that you have Express JS installed, you can create your first Express JS program. Create a new file called app.js in your project directory and add the following code:

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

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

app.listen(3000, () => {
  console.log('Server is running on http://localhost:3000');
});

In this code, we require the Express module and create an instance of the express object. We then define a route for the root URL (/) using the app.get() method and send a response with the text "Hello, Express JS!". Finally, we start the server on port 3000 and log a message to the console.

To run the Express JS program, you can use the following command in the terminal:

node app.js

This will start the Express JS server, and you can access it in your web browser by navigating to http://localhost:3000.

Congratulations! You have successfully created your first Express JS program. You can now explore the various features and functionalities of Express JS to build powerful web applications.

Conclusion

In this tutorial, we learned about Express JS, set up Express JS in our project, and created our first Express JS program. Express JS is a powerful web application framework that simplifies the process of building web applications in Node.js. You can explore the documentation and tutorials on the Express JS website (https://expressjs.com/) to learn more about the capabilities of Express JS.

I hope you found this tutorial helpful. Thank you for reading!