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TypeScript Mastery Roadmap

This detailed roadmap will take you from beginner to expert in TypeScript, covering fundamentals, advanced types, object-oriented programming (OOP), real-world usage, best practices, and projects.

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Phase 1: TypeScript Fundamentals

✅ Introduction to TypeScript

  • What is TypeScript? Why use it?

  • Installing TypeScript (npm install -g typescript)

  • Compiling TypeScript (tsc file.ts)

✅ Basic TypeScript Features

  • Primitive Types (string, number, boolean, null, undefined)

  • Type Annotations (let age: number = 25;)

  • Arrays & Tuples (number[], [string, number])

  • Enums (enum Role { Admin, User })

  • Type Inference

📌 Mini Projects:

  • Basic TypeScript Calculator

  • Simple To-Do List with Type Annotations

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Phase 2: Functions & Object-Oriented Programming (OOP)

✅ Functions in TypeScript

  • Function Annotations ((a: number, b: number) => number)

  • Optional & Default Parameters (function greet(name?: string))

  • Function Overloading

✅ OOP in TypeScript

  • Classes (class Person {})

  • Constructors & Methods

  • Access Modifiers (public, private, protected)

  • Inheritance & Polymorphism

📌 Mini Projects:

  • User Management System (OOP Concepts)

  • Class-Based Counter App

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Phase 3: Advanced TypeScript Concepts

✅ Advanced Types

  • Union & Intersection Types (type Admin = User & Permissions)

  • Type Aliases & Interfaces (interface User { name: string; })

  • Type Assertions (const input = document.getElementById('name') as HTMLInputElement;)

  • Generics (function identity<T>(arg: T): T { return arg; })

✅ TypeScript Utility Types

  • Partial<T>, Readonly<T>, Pick<T, K>, Record<K, T>

  • Mapped Types & Conditional Types

📌 Mini Projects:

  • Generic API Fetcher (Using Generics & Utility Types)

  • Configurable Form Builder (Advanced Types)

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Phase 4: TypeScript in Real-World Applications

✅ Working with Modules & Namespaces

  • ES Modules (import { something } from './module')

  • TypeScript Namespaces (namespace MyNamespace {})

✅ TypeScript with Frontend Frameworks

  • TypeScript with React (React.FC, useState<T>())

  • TypeScript with Next.js (getServerSideProps<T>())

  • TypeScript with Vue (defineProps<T>())

✅ TypeScript with Backend (Node.js & Express)

  • Express with TypeScript (express.Request, express.Response)

  • Type-safe APIs & Middleware

📌 Mini Projects:

  • Full-Stack App with TypeScript (Frontend + Backend API)

  • Type-Safe Authentication System (JWT + Express + React)

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Phase 5: Best Practices & Large-Scale Applications

✅ Code Quality & Best Practices

  • ESLint & Prettier for TypeScript

  • Writing Maintainable & Scalable Code

  • Debugging & Type Checking (tsc --watch)

✅ Final Projects & Portfolio Building

  • Task Management App (Full-Stack, TypeScript Only)

  • E-commerce Platform (React + TypeScript + Node.js)

  • GraphQL API with TypeScript (Apollo + Express)

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Final Step: Real-World Practice & Skill Testing

🔥 Platforms to Test & Improve Skills:

🚀 By mastering this roadmap, you’ll be able to: ✅ Write Scalable & Type-Safe Applications ✅ Work Efficiently in TypeScript-Based Projects ✅ Improve Code Maintainability & Performance

🔥 Start coding with TypeScript now!

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