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🟢 What is Node.js?

Node.js is an open-source Runtime Environment (environment for code execution) used to run JavaScript code in addition to web browsers.

Difference: Usually, JavaScript is designed to run only in a web browser, but Node.js has brought out the V8 JavaScript Engine (at the heart of Google Chrome) to run JavaScript on a server, on your computer, or on any other device.

Pros: Node.js is built with a Non-Blocking architecture, Event-Driven I / O, making it very efficient to handle many concurrent connections (Concurrency), which is ideal for applications that have to work with large amounts of data in real time.

🛠️ What can Node.js do?

Node.js is a very versatile tool and can be used in a variety of software developments. As follows:

1. 🌐 Back-End Development (Server-Side)

This is the most popular main use of Node.js.

Web Server: Used to create a Web Server and API (Application Programming Interface) to manage requests, process data, and interact with databases (such as MongoDB, PostgreSQL, SQLite).

Real-Time Applications: Ideal for applications that require continuous two-way communication; e.g.:

Chat Applications: Create a real-time chat room

Live Updates: Live Feed Updates, or Notifications

Gaming Servers: Multi-Player Gaming Server

Microservices: Used to create independent sub-services (Microservices) that combine into large applications.

2. 📝 Building tools and scripts

Because Node.js runs directly on a computer, it is popular to create various automated tools.

Task Automation (Gulp, Webpack): Used to perform repetitive tasks such as file minimization, file integration, or Front-End code transformation.

Command Line Interface (CLI) Tools: Create a program that runs through a Terminal command window to facilitate its operation.

3. 🖥️ Desktop Applications Development

Used in conjunction with a special Framework.

Electron: A framework that uses Node.js and Chromium (browser technology) to build desktop applications that work on Windows, macOS, and Linux (examples of apps built with Electron, such as VS Code, Slack).

4. 🔗 Working with Database (Database)

Used as an intermediary to connect and manage data from a variety of databases through various ORMs (Object-Relational Mapping) or Drivers.

5. 📦 NPM (Node Package Manager)

Node.js comes with NPM, the world's largest package manager, allowing you to easily install and use Library or Module to add capabilities to your project.

🚀 Summary of the advantages of using Node.js

Unified Language: Developers can use single-language JavaScript to write both Front-End and Back-End, making work and learning faster.

High Performance: Suitable for I / O-Bound Tasks (tasks that require frequent traffic, such as retrieval from a database or external API contact)

Large Ecosystem: There's a very large community and over a million NPM Packages to choose from.