TypeScript Advanced & Type System

What you will achieve

Read type designs of Zod / React Query / tRPC, write team-shared types with full IDE inference

Syllabus

• 1
  Type System Mental Model

  Structural subtyping, unknown vs any, never

• 2
  Generics Deep Dive

  constraint, default, infer

• 3
  Conditional Types

  T extends U ? X : Y, distributive behavior

• 4
  Mapped & Template Literal Types

  Pick/Omit/Record internals, string type composition

• 5
  Type Narrowing

  type guards, discriminated unions, satisfies

• 6
  Zod & Runtime Validation

  Schema design, type inference, API boundary checks

• 7
  Type-safe API

  tRPC-style shared client/server types

• 8
  tsconfig & Monorepo

  strict, project references, paths

Highlights

• Solve months-old type errors in one lesson
• Exercises drawn from real OSS type definitions
• Graduate with a self-built type-safe package

Instructor

Hi, I'm Morld's founder — a full-time engineer and amateur fitness enthusiast. I've been writing code for 10+ years; my primary stack is JavaScript / TypeScript / React + Cloud Run / GCP deployments, with C# / .NET, Docker, and DevOps as secondary specialties. My 1-on-1 teaching style is: first understand the outcome you want, then design the chapter order and pace to reach it. Each lesson ends with homework; the next starts with a 5-minute review.