The Node.js Handbook, 2025 edition

A comprehensive Node.js handbook has been completely rewritten for 2025, covering Node.js v22 LTS from basic concepts to advanced topics. The guide includes 40+ major topics spanning installation, core concepts, module systems, file operations, streams, cryptography, testing, and network programming. Designed for beginners, it focuses on fundamental concepts with clear explanations of both how and why Node.js works, featuring modern JavaScript, ES modules, built-in APIs, best practices, performance optimization, and security guidelines with real-world examples.