⚔️ TypeScript Domination

Welcome to TypeScript Domination – your ultimate resource to master TypeScript from the ground up like a true engineer, hacker, or developer.

This repository follows a phase-wise roadmap, covering everything from beginner to advanced real-world TypeScript concepts. Whether you're coming from JavaScript or diving straight into TS, this guide is designed to build your knowledge incrementally and practically.

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📘 About the Project

This repository is structured around a detailed, multi-phase roadmap for mastering TypeScript. You’ll not only learn syntax and theory but also real-world usage patterns, tooling, and integration with modern frameworks like React.

Each phase focuses on a core set of skills, building up your TypeScript expertise in a clean, organized, and hands-on manner.

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🚀 Roadmap Overview

The roadmap is divided into 5 Phases:

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🧹 PHASE 1: Fundamentals

1. Introduction

   • What is TypeScript?
   • Why use TypeScript over JavaScript?
   • TypeScript vs JavaScript
   • Setting up a TypeScript Project (tsc, tsconfig.json)

2. Basic Types

   • number, string, boolean
   • null, undefined, any
   • unknown, never, void

3. Type Inference & Annotation

   • Explicit vs Implicit Typing
   • Best Practices for Annotation

4. Variables & Constants

   • let, const with Type Annotations
   • Type safety and reassignment

5. Functions

   • Function Types
   • Optional & Default Parameters
   • Rest Parameters
   • Return Type Annotations
   • Arrow functions with Types

6. Arrays & Tuples

   • Typed Arrays (number[], string[])
   • Generic Array Type: Array<T>
   • Tuples ([string, number])
   • Readonly Arrays and Tuples

7. Objects

   • Object Type Definitions
   • Optional & Readonly Properties
   • Index Signatures

8. Enums

   • Numeric Enums
   • String Enums
   • Enum vs Union Types

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✨ PHASE 2: Intermediate Concepts

1. Union & Intersection Types

   • type A = string | number
   • type B = {x: number} & {y: number}

2. Literal Types & Type Aliases

   • String, Number, Boolean Literals
   • type Direction = 'left' | 'right' | 'center'

3. Type Narrowing

   • typeof, instanceof, in operators
   • Custom Type Guards
   • Discriminated Unions

4. Interfaces

   • Creating & Extending Interfaces
   • Interface vs Type
   • Optional and Readonly Modifiers

5. Functions Advanced

   • Function Overloads
   • this parameter
   • Call Signatures in Types/Interfaces

6. Working with Classes

   • Class syntax with Types
   • Public / Private / Protected / Readonly
   • Constructors & Property Initialization
   • Inheritance and implements

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💡 PHASE 3: Advanced Types

1. Generics

   • Generic Functions
   • Generic Interfaces & Classes
   • Constraints with <T extends>
   • Default Generic Types

2. Utility Types

   • Partial, Required, Readonly, Record
   • Pick, Omit, Exclude, Extract
   • ReturnType, Parameters, InstanceType

3. Advanced Types

   • Mapped Types
   • Conditional Types (T extends U ? X : Y)
   • Template Literal Types
   • Key Remapping with as

4. Declaration Merging

   • Interface Merging
   • Module Augmentation

5. Modules & Namespaces

   • ES modules in TS
   • import / export syntax
   • Ambient Declarations (declare)

6. Error Handling

   • Typing try / catch
   • Custom Error Classes

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🛋️ PHASE 4: Tooling & Integration

1. Configuration

   • tsconfig.json Options
   • include, exclude, compilerOptions
   • strict, target, module, lib

2. Working with npm & Modules

   • Type Declarations Files (.d.ts)
   • Installing @types packages
   • Type definitions for 3rd-party libraries

3. TypeScript with JavaScript

   • Migration strategies
   • JSDoc annotations to assist JS with TS

4. TypeScript + React

   • Typing Functional Components
   • Props & State with Interfaces
   • React.FC vs VoidFunctionComponent
   • Event Handlers with TS
   • Using Generics in Components
   • Typing useRef, useReducer, useContext

5. Linting & Formatting

   • ESLint for TypeScript (@typescript-eslint)
   • Prettier with TypeScript
   • Rules for code quality

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🛠️ PHASE 5: Expert Concepts

1. Advanced Typing Techniques

   • Type-level Programming
   • Recursive Types
   • Branded Types (opaque types)
   • Polymorphic this types

2. Type Safety & Contracts

   • Preventing any
   • Compile-time safety with proper constraints
   • Avoiding overuse of unknown

3. Monorepos & TypeScript

   • Project References
   • Composite Projects
   • Managing Types across packages

4. Build & Deployment

   • TypeScript with Webpack / Vite
   • Type Checking in CI/CD
   • tsc vs Babel with TS

5. Testing with TypeScript

   • Writing Tests in Jest + TS
   • Typing Mocks and Stubs
   • Types for Unit & Integration Test

6. Patterns & Best Practices

   • Domain-driven Types
   • Avoiding Type Inference Pitfalls
   • Favoring Composition over Inheritance
   • Safe API Integration with zod / io-ts

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🌐 Repository Structure (Coming Soon)

TypeScript_Domination/
├── phase-1-fundamentals/
├── phase-2-intermediate/
├── phase-3-advanced-types/
├── phase-4-tooling/
├── phase-5-expert/
├── README.md
└── tsconfig.json

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🙌 Contributing

If you'd like to contribute, fix typos, or add examples, feel free to submit a PR or open an issue.

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👀 Stay Connected

• Author: ExploitEngineer
• Repo: TypeScript_Domination

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🌟 License

This project is licensed under the MIT License.

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“Mastering TypeScript isn't just about knowing types – it's about writing safer, scalable, and smarter code.”