Table of contents : What is Node.js? Key features and benefits Installing Node.js Variables and data types Control flow and loops Functions and scope Objects and arrays Asynchronous programming concepts Modules and the CommonJS pattern Using npm (Node Package Manager) Understanding the Node.js event loop fs (File System) module http and https modules path module events module Callbacks and the callback pattern Promises and async/await Error handling with callbacks and promises Working with streams and buffers Building a web server using Node.js Handling HTTP requests and responses Express.js framework Routing and middleware in Express.js Connecting to databases Performing CRUD operations Object-Relational Mapping (ORM) libraries Database migrations Designing and building RESTful APIs Parsing and validating JSON data Authentication and authorization API documentation and testing Introduction to WebSockets Building a real-time chat application Broadcasting messages Handling WebSocket events Writing unit tests with frameworks Test-driven development (TDD) principles Debugging Node.js applications Performance profiling and optimization Protecting against common web vulnerabilities Input validation and sanitization Handling sensitive data Deploying Node.js applications to production Load balancing and horizontal scaling Containerization with Docker Continuous integration and deployment (CI/CD) Using native C/C++ addons with Node.js Building command-line applications Building desktop applications with Electron.js Serverless architecture with Node.js