Foundations

Master TypeScript from first principles — types, generics, async, decorators, and a complete CLI capstone.

Prerequisites: Basic JavaScript (variables, functions, arrays, objects). No TypeScript experience required.

---

Lab Overview

#	Lab	Key Concepts	Time
01	Hello World & Basics	Primitive types, inference, tuples, interfaces, strict mode	20 min
02	Functions & Type Signatures	Typed params, generics, overloads, closures, Result type	25 min
03	Interfaces & Utility Types	Partial, Pick, Omit, Record, mapped types, discriminated unions	30 min
04	Classes & OOP	Access modifiers, abstract, mixins, generic classes, decorators	35 min
05	Enums & Literal Types	String/numeric/const enums, literal unions, state machines	25 min
06	Generics Deep Dive	Constraints, infer, Optional<T>, Result<T,E>, TTL cache	35 min
07	Modules & Declarations	ES modules, .d.ts, module augmentation, barrel files	25 min
08	Error Handling	Typed errors, Result pattern, never, retry, validation	30 min
09	Async TypeScript	Promise<T>, Awaited<T>, async generators, timeout/retry	35 min
10	Type Manipulation	keyof, typeof, indexed access, template literals, as const	30 min
11	Decorators & Metadata	Class/method/property decorators, DI container, validation	35 min
12	TypeScript + Node.js	File I/O, HTTP server, streams, env vars, process types	35 min
13	Testing	Node test runner, typed mocks, spies, builders, property tests	30 min
14	Advanced Patterns	Builder, Observer, Command, Strategy, Proxy, state machine	35 min
15	Capstone: CLI Tool	Full prodctl CLI: types, store, parser, formatter, tests	60 min

Total estimated time: ~8 hours

---

Start here: Lab 01 — Hello World & TypeScript Basics

---

Learning Path

Labs 01–04 lay the foundation: types, functions, interfaces, and classes. These cover ~80% of day-to-day TypeScript.

Labs 05–08 expand your toolkit: enums, generics, modules, and error handling. You'll write code that rivals production TypeScript.

Labs 09–12 go deep: async patterns, type manipulation, decorators, and Node.js integration. These power real-world backends.

Labs 13–15 are about quality: testing, patterns, and the capstone CLI that ties everything together.

---

Docker Quick Start

docker pull zchencow/innozverse-ts:latest
docker run --rm zchencow/innozverse-ts:latest ts-node -e "
const greet = (name: string): string => \`Hello, \${name}!\`;
console.log(greet('TypeScript'));
"