Summary  
This chapter introduces the concept of a JavaScript runtime environment that allows executing code outside the browser for server-side use.

General domain of usage  
Backend web development

#  The World of Node.js
We will uncover why Node.js has become a rockstar in backend development. Even if you're not a tech wizard, we're here to unravel the mystery behind this powerful tool.

**Node.js** is a runtime environment that enables developers to create and execute applications with JavaScript. This language is typically associated with web browsers, but Node.js extends its use to server-side applications, which is useful.


Node.js enables the use of JavaScript as a versatile language for both Frontend and Backend development, streamlining the process with a single language.

Learn to build backend applications with Node.js and Express.js. Set up your environment and create your first Node.js apps. Work with the file system and build simple console tools. Use Express.js to build web apps, handle routes, and manage requests.

Explore the Backend's crucial role and get acquainted with Node.js — a game-changing runtime environment. Uncover its advantages, learn Node.js installation, and dive into creating your first Node.js app.

Create console applications using Node.js. We will cover fundamental concepts, practical examples, and hands-on exercises to ensure we can confidently create our console applications.

Delve into Express.js as a web application framework. You'll gain insights into why Express is a popular choice for web development, how to set up a basic Express application, create routes to handle various requests and understand middleware concepts.

Learn how to build a REST API using Node.js and Express.js, step by step. This section will walk you through creating a simplified Twitter-like app, helping you master the art of developing RESTful APIs while adding a valuable project to your portfolio.

What Is Node.js?

The World of Node.js