TypeScript Deep Dive

A comprehensive TypeScript learning path covering type system, generics, type narrowing, decorators, module resolution, and advanced type patterns for type-safe development.

1. 1

   TypeScript Fundamentals

   Learn static typing, basic types, and type annotations

   Completion criteria: Convert a JS project to TypeScript with basic types

   Next step: Study interfaces and type aliases

   ⏱ 8h

2. 2

   Interfaces and Type Aliases

   Master interfaces, type aliases, and structural typing

   Prerequisites: ts-01

   Completion criteria: Design type structures using interfaces and type aliases

   Next step: Learn generics

   ⏱ 8h

3. 3

   Generics and Type Variables

   Write generic functions, classes, and type constraints

   Prerequisites: ts-02

   Completion criteria: Build a generic utility library with proper constraints

   Next step: Study type narrowing and guards

   ⏱ 10h

4. 4

   Type Narrowing and Type Guards

   Master type narrowing, discriminated unions, and type guards

   Prerequisites: ts-03

   Completion criteria: Implement type-safe code with narrowing and guards

   Next step: Learn utility types

   ⏱ 8h

5. 5

   Utility Types and Mapped Types

   Use built-in utility types and create custom mapped types

   Prerequisites: ts-04

   Completion criteria: Create custom utility types for a real project

   Next step: Study conditional types

   ⏱ 10h

6. 6

   Conditional Types and Inference

   Master conditional types, infer keyword, and type-level programming

   Prerequisites: ts-05

   Completion criteria: Build advanced type utilities using conditional types

   Next step: Learn decorators and metadata

   ⏱ 10h

7. 7

   Decorators and Metadata

   Understand decorators, reflect-metadata, and use cases

   Prerequisites: ts-06

   Completion criteria: Implement class and method decorators for a framework

   Next step: Study module resolution

   ⏱ 8h

8. 8

   Module Resolution and tsconfig

   Configure tsconfig.json with proper module resolution strategies

   Prerequisites: ts-07

   Completion criteria: Configure a production tsconfig with optimal settings

   Next step: Learn declaration files

   ⏱ 8h

9. 9

   Declaration Files and d.ts

   Write and publish TypeScript declaration files

   Prerequisites: ts-08

   Completion criteria: Create declaration files for an untyped JS library

   Next step: Study TypeScript with frameworks

   ⏱ 6h

10. 10

    TypeScript with React and Node

    Use TypeScript effectively with React and Node.js projects

    Prerequisites: ts-09

    Completion criteria: Build a full-stack TypeScript application

    Next step: Learn strict mode and linting

    ⏱ 8h

11. 11

    Strict Mode and Type Linting

    Enable strict mode and use type-aware linting rules

    Prerequisites: ts-10

    Completion criteria: Configure strict TypeScript with type-aware ESLint rules

    Next step: Build a capstone TypeScript project

    ⏱ 6h

12. 12

    Capstone TypeScript Project

    Build a type-safe application demonstrating advanced TypeScript

    Prerequisites: ts-11

    Completion criteria: Deliver a fully typed application with advanced type patterns

    Next step: Explore TypeScript compiler API and contribute to typed libraries

    ⏱ 10h