TypeScript Fundamentals

A structured, self-paced course in TypeScript for developers

What you'll learn

This course takes you from zero TypeScript to building complete, well-structured projects. Each module builds on the last, with hands-on code examples you can run immediately.

TypeScript's type system — primitives, arrays, tuples, objects, unions, intersections
Functions, classes, interfaces, and generics with full type safety
Advanced patterns: type narrowing, discriminated unions, utility types
Async/await, error handling, and working with JSON and APIs
Real-world tooling: npm, tsconfig.json, testing with Vitest
Decorators, mapped types, conditional types, and template literal types
A complete capstone project tying all 20 modules together

The top 10% of the course in one sitting

Skim the essentials, then dive deeper where it matters.

Drill the full question bank

Spaced-repetition memory across every module quiz.

Self-Study Modules

Typed Basics

Module 0 Typed Basics

What Is TypeScript

Module 1 Typed Basics

Variables and Types

Module 2 Typed Basics

Arrays, Tuples, and Objects

Module 3 Typed Basics

Functions and Type Signatures

Module 4 Typed Basics

Composing Types

Module 5 Composing Types

Type Aliases and Unions

Module 6 Composing Types

Module 7 Composing Types

Module 8 Composing Types

Module 9 Composing Types

Enums and Utility Types

Real-World Code

Module 10 Real-World Code

Module 11 Real-World Code

Modules and Imports

Module 12 Real-World Code

Async/Await and Promises

Module 13 Real-World Code

Module 14 Real-World Code

Project Toolchain

Module 15 Project Toolchain

npm and Package Management

Module 16 Project Toolchain

tsconfig and Build Configuration

Module 17 Project Toolchain

Testing with Vitest

Module 18 Project Toolchain

Decorators and Advanced Patterns

Module 19 Project Toolchain

Capstone: Task Tracker CLI

Your Practice Path

After Modules 0-4:   You can write typed functions, arrays, and control flow
After Modules 5-9:   You can model complex data with interfaces, generics, and utility types
After Modules 10-14: You can handle async code, errors, and external data safely
After Modules 15-19: You can set up, test, and structure a complete TypeScript project