Your Complete TypeScript Roadmap: Beginner to Pro

Start your journey with TypeScript—learn how to write safer, scalable, and more maintainable JavaScript applications with ease.

Basic overview

What is TypeScript?

Why Learn TypeScript?

Estimated time commitment for the roadmap.

Phases of the TypeScript Roadmap

Phase 1: Prerequisites

Solid understanding of JavaScript (ES6+)

Familiarity with basic programming concepts

Basic knowledge of development tools (VSCode, Terminal, Git)

Phase 2: Getting Started with TypeScript

What is TypeScript? Why use it?

Installing TypeScript (npm install -g typescript)

Setting up a TypeScript Project

tsconfig.json Explained

Compiling .ts files to .js

Phase 3: Basic Type System

Basic Types (string, number, boolean, etc.)

Arrays & Tuples

Enums

Any, Unknown, Void, Null, and Undefined

Type Assertions

Phase 4: Functions in TypeScript

Function Return Types

Optional & Default Parameters

Rest Parameters

Function Overloading

Arrow Functions with Types

Phase 5: Objects and Interfaces

Defining Object Types

Creating & Using Interfaces

Optional & Readonly Properties

Interface vs Type Alias

Phase 6: Classes and OOP in TypeScript

Classes & Constructors

Access Modifiers (public, private, protected)

Inheritance and Extending Classes

Interfaces with Classes

Abstract Classes

Phase 7: Advanced Types

Union & Intersection Types

Literal Types

Type Aliases

Type Guards

Discriminated Unions

Conditional & Mapped Types

Utility Types (Partial, Pick, Omit, etc.)

Phase 8: Generics

What are Generics?

Generic Functions and Classes

Generic Constraints

Built-in Generic Utility Types

Phase 9: Modules and Namespaces

Working with ES Modules

Import / Export in TypeScript

Namespaces (for internal modules)

Type Declarations

Phase 10: Working with Third-Party Libraries

Using DefinitelyTyped (@types)

Type Definitions for JavaScript Libraries

Creating Custom Type Declarations

Phase 11: TypeScript with Frontend Frameworks

Using TypeScript in React (TSX)

Angular with TypeScript (already built-in)

Vue + TypeScript (with Vue 3 and Composition API)

Phase 12: Tooling and Best Practices

ESLint with TypeScript

Prettier Integration

Linting & Formatting

Type Checking in Build Pipelines

Phase 13: Real-World Projects

Portfolio Website in TS

To-do App with React + TS

Blog API using TypeScript + Node.js

Phase 14: Deployment & Optimization

Building TypeScript Projects

Code Splitting & Tree Shaking

Bundling with Webpack / Vite

Hosting Your TS Projects

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