Node.js Tutorial #3 — Modules, require(), module.exports & ES Modules
🚀 Welcome to Video 3 of the Complete Node.js Backend Playlist!
In this video, you'll learn one of the most important concepts in Node.js: Modules.
If you've ever wondered:
✅ What is a module?
✅ How does require() actually work?
✅ What is module.exports?
✅ How does Node.js share code between files?
✅ What is the require cache?
✅ CommonJS vs ES Modules — what's the difference?
✅ How do professional Node.js projects organize code?
Then this lesson is for you.
We'll build multiple modules from scratch, explore how Node resolves files, understand the require cache, refactor a real project into a modular architecture, and compare CommonJS with modern ES Modules.
By the end of this video, you'll understand how large Node.js applications are structured and how developers organize maintainable backend code.
📚 Topics Covered:
00:00 Intro
00:04 Node.js Modules
00:59 Recipe Book Analogy
01:39 CommonJS Patterns
01:59 Single Value Export
02:21 Export an Object & destructure
02:56 Export a class
03:20 Inside Require
04:23 Required Cache
05:12 Clean Architecture
06:16 ES Modules
06:57 Common Mistakes
#NodeJS
#JavaScript
#BackendDevelopment
#WebDevelopment
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