Core Node.js – Concepts, Patterns & Hands‑On Examples

A curated knowledge base of Node.js code & learning resources collected from courses, books and production back‑ends. The project is organised as a mono‑repo where each top‑level folder is a self‑contained mini‑project – clone the repo, cd into a folder, install and run.

Tip ▸ Can’t see a folder mentioned below? The repository is evolving – pull to get the latest or open an issue and we’ll add it.

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🗂 Directory Index (root‑level)

Folder	Quick glance
async-patterns	Callback → Promise → async/await, control‑flow helpers (async lib)
async-sync-refresher	Event‑loop phases, micro‑tasks vs. macro‑tasks illustrated
examples_from_books	Annotated code taken from Node.js Design Patterns & others
express-essential	Idiomatic Express: routing, middleware, template engines
http-with-node	Bare‑metal HTTP/HTTPS servers with http core module
interview-questions	Common coding tasks + explanations (throttling, debouncing…)
javascript-concepts	Language fundamentals, modules, closures, prototypes
node-microservices	gRPC & NATS demos, Docker Compose service mesh
nodejs-getting-started	Intro track: setup → modules → NPM → first server
objects-prototypes-classes	Deep‑dive OOP in JS & TypeScript
promises-and-async-programming	Advanced Promise patterns, cancellation, AsyncLocalStorage
real-time-web-with-socket-io	Websockets chat, Redis adapter horizontal scaling
restful-mongo-node-express	CRUD REST API with MongoDB/Mongoose + JWT auth
security-best-practices	Helmet, rate‑limiting, OWASP cheatsheets (WIP)
website-with-node-and-express	Full MVC website (EJS) with sessions & passport‑local

The easiest way to explore is gh repo clone hassonor/core-nodejs && tree -L 2

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🚀 Run an Example

# clone once
$ git clone https://github.com/hassonor/core-nodejs.git
$ cd core-nodejs

# pick a project
$ cd express-essential/04-basic-routing

# install deps & start
$ npm install
$ npm start

Containers or databases? Look for a docker-compose.yml inside that folder and simply docker compose up -d.

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🧭 Suggested Learning Paths

Track	Order
Beginner	nodejs-getting-started → javascript-concepts → async-sync-refresher
Web API	express-essential → restful-mongo-node-express → security-best-practices
Real‑time	real-time-web-with-socket-io → scale with node-microservices
Interview prep	interview-questions → review objects-prototypes-classes

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🛠 Common Tooling

• ESLint + Prettier configs where needed
• Jest / node:test for unit tests
• .env.example files + dotenv for configuration
• Docker multi‑stage builds (small production images)

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🤝 Contributing

Spotted a broken link? Got a cool example? PRs welcome!

1. Fork → feature branch → PR.
2. Pass npm test in affected projects.
3. For large additions open an issue first.

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📝 License

MIT © @hassonor