First App

Installing dependencies

You can install the necessary dependencies using the following command:

npm install express

This will install the Express framework, which is a popular web framework for Node.js.

Creating a new project directory

Once you have installed the dependencies, you can create a new project directory using the following command:

mkdir my-app

Creating a index.js file

Now that you have created a new project directory, you need to create a index.js file. This file will contain the code for your app.

Importing the Express framework

In your index.js file, you need to import the Express framework. You can do this by adding the following line to your file:

JavaScriptconst express = require('express'); Use code with caution. Learn morecontent_copy

Creating an app

Now that you have imported the Express framework, you can create an app. You can do this by creating a new instance of the Express class.

JavaScriptconst app = express(); Use code with caution. Learn morecontent_copy

Listening for requests

Now that you have created an app, you need to listen for requests. You can do this by using the app.listen() method.

JavaScriptapp.listen(3000); Use code with caution. Learn morecontent_copy

This will listen for requests on port 3000.

Running your app

Once you have listened for requests, you can run your app by running the following command in your project directory:

npm start

This will start a development server that will run your app. You can then open your app in a web browser by visiting the URL http://localhost:3000.