TypeScript Roadmap

Quickly Become a TypeScript Developer

Complete Roadmap for Mastering TypeScript in 2025. Covers all the concepts from getting started all the way to advanced TypeScript features that can help you wrangle to toughest of codebases 🔥

Before You Start

Professional Modern JavaScript

Get Started

Get started with TypeScript, Setup your development environment and configure the compiler.

Introduction

Setup

Target Compiler Option

Strict Compiler Option

Core Types

Learn the core types of TypeScript and how to use them.

Primitive Types

Instance Types

Arrays And Tuples

Objects

Function Types

Classes in TypeScript

TypeScript's Relationship with JavaScript

Learn how certain JavaScript patterns relate to TypeScript how to navigate it effectively.

const declarations

Async Await

Lexical this

Class Parameter Properties

null vs undefined

Function Overloading

Call Signatures

undefined vs. optional

Enums are Bad

Property Modifiers

Learn about how TypeScript has special annotations for certain properties.

readonly Modifier

Optional Modifier

TypeScript Special Types

Learn about special types in TypeScript and how to use them.

Structural Typing

Type Casting

Special Types any And unknown

JavaScript to TypeScript

Type Declarations

never Type

Literal Types

Abstract Classes

Index Signatures

Readonly Arrays and Tuples

this Parameter

Assertions

Learn how to use assertions to tell TypeScript what you know about your code.

Type Assertions

Non Null Assertion Operator

Definite Assignment Assertion

Double Assertions

const Assertions

Generics

Learn how to use generics to create reusable code.

Generics

Generic Constraints

Modules

Learn how to reuse and share TypeScript code.

Modules

Creating NPM packages

Project References

Combination Types

Learn how to combine types to create more complex types.

Union Types

Intersection Types

Discriminated Unions

Union vs Intersection Mental Model

Execution Environments

Learn how to use TypeScript in different execution environments.

Running in NodeJS

Frontend Projects

Type Inferrence

Learn insights about how TypeScript can automatically infer types by looking at your code

Type Narrowing

User Defined Type Guards

Assertion Functions

satisfies Operator

Interfaces

Learn how to use interfaces in TypeScript and how they differ from type aliases

Interfaces

Interface Declaration Merging

Types vs Interfaces

implements Keyword

Type Gynmastics

Learn how to use TypeScript's type system to create more complex types and how to use them effectively.

typeof Type Operator

Lookup Types

keyof Type Operator

Conditional Types

Contitional Types with Unions and never

infer Keyword and `ReturnType<T>`

Mapped Types

Mapped Type Modifiers

Template Literal Type

Mapped Types as Clauses

Built-in Special Types and Type Functions

Learn how to use custom and built in type functions that are resusable types that can create new types.

PropertyKey Type

Partial<T>

Required<T>

Readonly<T>

Record<K, T>

ThisType<T>

Awaited<T>

String Manipulation Types

Continue Your Journey

Professional React

Professional NextJS

Professional Microsoft Playwright

TypeScript Learning Path

While a roadmap helps categorize the different concepts you need to learn, it doesn't provide the best learning experience. This is because you often need to jump between concepts in order to internalize the ideas presented and incrementally build the experience.

That is why our courses follow a linear learning path, where each lesson is presented in an order that ensures introducing sub-concepts before we use them in later lessons.