---
title: "Advanced TypeScript — ZudoJS Academy"
description: "The type system in depth: type operators, utility, mapped, conditional and template literal types, inference, variance and branded types, then type-safe events, CQRS and dependency injection, decorators, declaration files, packages, monorepos, type-level tests and compiler performance."
source: https://zudojs.oyinlola.site/learn/typescript-advanced
---

LEVEL 6 · TYPESCRIPT

Course Advanced

# Advanced TypeScript

The type system in depth: type operators, utility, mapped, conditional and template literal types, inference, variance and branded types, then type-safe events, CQRS and dependency injection, decorators, declaration files, packages, monorepos, type-level tests and compiler performance.

- **1 lessons**
- **45 min** to read and try
- **Before this:** [TypeScript](https://zudojs.oyinlola.site/learn/typescript)

0 of 1 lessons done

[Start lesson 1 →](https://zudojs.oyinlola.site/learn/ts-advanced)

## When you finish, you can

- Derive types from values and other types with keyof, typeof and indexed access
- Write mapped, conditional and template literal types, using infer
- Choose between as, satisfies and as const
- Model a domain with branded types and discriminated unions
- Build type-safe event, command and dependency injection infrastructure
- Write declaration files and publish a typed package
- Test types, and keep a large project fast to compile

**You build:** A typed event bus, a typed dependency injection container and a typed command bus

MODULE 1

## Type operators

1. [1**Advanced and utility types**Build new types from existing ones with keyof, typeof, indexed access, mapped, conditional and template literal types, and use the built-in utility types (Partial, Pick, Omit, Record, ReturnType, Awaited and more) to keep one source of truth.45 min](https://zudojs.oyinlola.site/learn/ts-advanced)

## Course checkpoint

Prove you can move on. The checkpoint picks 5 questions at random from every lesson in this course. Get 4 right to pass. Your result is saved in this browser only.