Node.js also includes a package manager NPM <\/strong>(Node Package Manager), which you can use to install and manage third-party packages (libraries and frameworks) for your Node.js projects. To install a package using the npm package manager, you can use the following command:<\/p>\n\n\n\n To start using Node.js, you will need to install it on your computer. You can download Node.js from the official website https:\/\/nodejs.org\/<\/a> and install it according to the instructions provided. Once you have Node.js installed, you can use it to run JavaScript files from the command line (CMD, terminal, powershell, etc.).<\/p>\n\n\n\n To develop a simple Node.js application, you will need to have Node.js installed and create a new project. You can do this with the following commands:<\/p>\n\n\n\n This code creates an Express server that listens for HTTP requests on port 3000. When it receives a request, it sends a response with the text \u201cHello World!\u201d. To start the server, run the following command:<\/p>\n\n\n\n You should see a message in the console that the server is listening on port 3000 (e.g. \u201cServer listening on port 3000\u201d).<\/p>\n\n\n\n To test how the running server works, open a web browser and go to http:\/\/localhost:3000. You should see the message \u201cHello World!\u201d displayed in the browser.<\/p>\n\n\n\n This is a very basic example of an application built with Node.js and Express. You can add multiple routes to the application with different functionality and have it respond differently by defining additional endpoints and handling different HTTP methods (e.g. POST, PUT, DELETE).<\/p>\n\n\n\n Node.js <\/strong>is open source runtime environment<\/strong>, which runs on the server side, meaning it does not require a web browser. It is often used to build real-time applications or applications that work through APIs. Website development<\/a> is suitable with this tool because it is fast and efficient. It is also often used in microservices architecture.<\/p>\n\n\n\nnpm install packageName<\/code><\/pre>\n\n\n\nUsing Node.js and Express for a \u201chello world\u201d application <\/h2>\n\n\n\n
npm init npm install express<\/code><\/pre>\n\n\n\nThen create a file, usually named server.js, and add the code:<\/pre>\n\n\n\n
const express = require('express'); const app = express(); app.get('\/', (req, res) => { res.send('Hello World!'); }); app.listen(3000, () => { console.log('Server listening on port 3000'); });<\/code><\/pre>\n\n\n\nnode server.js<\/code><\/pre>\n\n\n\n![\"\"](\"https:\/\/gregarednak.si\/wp-content\/uploads\/2023\/07\/Hello-world.gif\")
<\/figure>\n\n\n\nConclusion<\/h2>\n\n\n\n