Level up your JavaScript skills using TypeScript. Hands-on lessons will teach you about types, interfaces, generics, and real-world patterns to confidently build safer, scalable, modern apps.

typescript5-8-3.tar.gz

execute index.ts

load without execution

compile but don't execute

This course is built for JavaScript developers ready to level up their code quality, collaboration, and safety. Starting with core types and inference, you’ll learn about interfaces, unions, generics, classes, utility types, and real-world patterns. You’ll model complex data, catch bugs at compile time, and write code that scales efficiently. 

With interactive lessons, hands-on exercises, and a capstone project, you’ll develop both conceptual understanding and practical skills to use TypeScript like a pro. This course sharpens your skills in modern TypeScript and prepares you to build and maintain codebases in any environment.

Learn TypeScript

Master discriminated unions by modeling a real-world API response with full exhaustiveness and type safety.

Introduction to TypeScript

Type System and Type Errors

Objects and Collections

Type Composition and Variants

Classes and Generics

Real-World TypeScript

Build a Memory Card Matching Game

Wrap Up and Next Steps

Exercise: Model Structured API States with Discriminated Unions

The problem