A complete, step-by-step TypeScript tutorial series. From your first program to building full-stack applications with React, Node.js, and Next.js. Every article has working code you can copy and run.
No complicated theory. Just simple explanations and real code.
Part 1: Foundations (Tutorials #1–#8)
Learn the building blocks of the TypeScript language.
| # | Tutorial | What You Will Learn |
|---|---|---|
| 1 | What is TypeScript? Why Use It in 2026? (Coming Soon) | Why TypeScript matters, who uses it, what you can build |
| 2 | Installation and Setup (Coming Soon) | Node.js, npm, VS Code setup, tsconfig.json, first program |
| 3 | Basic Types (Coming Soon) | string, number, boolean, arrays, tuples, any, unknown |
| 4 | Functions and Type Annotations (Coming Soon) | Parameter types, return types, arrow functions, overloads |
| 5 | Objects and Interfaces (Coming Soon) | Object types, interfaces, extending, interface vs type |
| 6 | Union Types, Literal Types, and Type Aliases (Coming Soon) | Union types, literal types, discriminated unions |
| 7 | Enums and Const Assertions (Coming Soon) | Enums, const enums, as const, satisfies |
| 8 | Type Narrowing and Type Guards (Coming Soon) | typeof, instanceof, custom type guards, exhaustive checks |
Part 2: Intermediate (Tutorials #9–#16)
Build stronger programs with generics, classes, modules, and async patterns.
| # | Tutorial | What You Will Learn |
|---|---|---|
| 9 | Generics (Coming Soon) | Generic functions, interfaces, constraints, keyof |
| 10 | Classes and Access Modifiers (Coming Soon) | public, private, protected, abstract classes |
| 11 | Modules and Namespaces (Coming Soon) | import, export, type-only imports, declaration files, path aliases |
| 12 | Utility Types (Coming Soon) | Partial, Required, Pick, Omit, Record, ReturnType |
| 13 | Mapped Types and Conditional Types (Coming Soon) | Custom mapped types, conditional types, infer |
| 14 | Template Literal Types (Coming Soon) | Type-safe strings, string manipulation types, patterns |
| 15 | Error Handling Patterns (Coming Soon) | Custom errors, Result type, typed catch blocks |
| 16 | Async/Await and Promises (Coming Soon) | Promise types, async functions, error handling, fetch wrapper |
Part 3: Practical (Tutorials #17–#22)
Apply TypeScript to real frameworks and tools.
| # | Tutorial | What You Will Learn |
|---|---|---|
| 17 | TypeScript with React (Coming Soon) | Props, state, events, hooks, context, generic components |
| 18 | TypeScript with Node.js and Express (Coming Soon) | Typed routes, middleware, REST API, environment variables |
| 19 | TypeScript with Next.js (Coming Soon) | App Router, Server Components, Server Actions, typed routes |
| 20 | Testing TypeScript with Vitest (Coming Soon) | Vitest, mocking, async testing, type testing |
| 21 | Zod — Runtime Validation (Coming Soon) | Schemas, parse, infer, transforms, API validation |
| 22 | tRPC — End-to-End Type Safety (Coming Soon) | Procedures, Next.js integration, Zod input validation |
Part 4: Advanced and Projects (Tutorials #23–#25)
Advanced patterns and a real project.
| # | Tutorial | What You Will Learn |
|---|---|---|
| 23 | Advanced Patterns (Coming Soon) | Discriminated unions, branded types, builder pattern, type-safe events |
| 24 | TypeScript Config Deep Dive (Coming Soon) | tsconfig.json, strict mode, paths, project references |
| 25 | Build a Type-Safe CLI Tool (Coming Soon) | Commander, Zod, chalk — complete bookmark manager project |
Who is This For?
- JavaScript developers who want to add TypeScript to their skills
- Developers from other languages (Python, Go, Rust, Kotlin) who want to build type-safe web apps
- Beginners who want to learn a modern, in-demand language
- Anyone who learns better by building real things instead of reading documentation
How to Use This Series
Start from Tutorial #1 and go in order. Each tutorial builds on the previous one. If you already know the basics, jump to Part 2 (Tutorial #9) for intermediate patterns.
Source Code
All code from this series is on GitHub: kemalcodes/typescript-tutorial