Foundations

15 labs from your first console.log to building async Node.js applications, CLI tools, and tested codebases.

#	Lab	Key Concepts
1	Hello World & Node.js	console.log, node REPL, running scripts
2	Variables & Types	var/let/const, primitives, coercion, ===
3	Functions & Closures	declarations, arrows, scope, closures
4	Arrays & Objects	map/filter/reduce, spread, destructuring
5	Classes & OOP	class, extends, private fields, mixins
6	Promises & Async/Await	Promise, async/await, Promise.all
7	Error Handling	try/catch, custom errors, Result pattern
8	Modules	require, module.exports, ESM import/export
9	Node.js File System	fs, path, streams, readline
10	HTTP & Fetch API	fetch, POST/PUT/DELETE, AbortController, Promise.all
11	Regular Expressions	patterns, groups, replace, validation, log parsing
12	Iterators & Generators	Symbol.iterator, function*, yield, async generators
13	Functional Programming	pure functions, compose, curry, Maybe monad
14	Testing with Node:test	unit tests, mocks, async tests, TDD
15	Node.js CLI Tool	argv, stdin, colors, subcommands, signals

Runtime: Node.js 20 LTS · Docker: zchencow/innozverse-js:latest

🐳 Quick Start

docker run --rm zchencow/innozverse-js:latest node -e "console.log('Hello, JavaScript!')"