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TypeScript Architecture & Patterns🏛️

Intermediate→Advanced

TypeScript 5.9

Apply TypeScript to architectural problems, design patterns, and functional programming concepts.

6

Sections

18

Lessons

18

Challenges

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18 lessons and 18 challenges, all 100% free.

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Nominal vs Structural Typing

Smart Constructors & Runtime Validation

Real-World Branded Type Patterns

Create a Branded Type(Sign in required)

Intermediate+20 Mana

Branded Type Patterns(Sign in required)

Intermediate+20 Mana

Brand Compatibility(Sign in required)

Intermediate+20 Mana

Immutability in TypeScript

Function Composition & Currying

The Option/Maybe Pattern

Using as const(Sign in required)

Intermediate+20 Mana

Readonly Array Parameter(Sign in required)

Beginner+10 Mana

Pipe Function Steps(Sign in required)

Intermediate+20 Mana

The Result Type Pattern

Typed Error Hierarchies

Chaining Results with Map and FlatMap

Discriminated Union Narrowing(Sign in required)

Intermediate+20 Mana

Result Discriminant Property(Sign in required)

Intermediate+20 Mana

The never Type in Exhaustive Checks(Sign in required)

Advanced+30 Mana

Type-Safe Builder Pattern

Strategy Pattern with Interfaces

Typed Observer & EventEmitter

Singleton Constructor Visibility(Sign in required)

Intermediate+20 Mana

Builder Method Chain(Sign in required)

Intermediate+20 Mana

Design Pattern Recognition(Sign in required)

Advanced+30 Mana

Abstract Classes & Mixins

Interface Segregation Principle

Generic Repositories & Services

Implement Abstract Class(Sign in required)

Intermediate+20 Mana

Mixin Return Type(Sign in required)

Advanced+30 Mana

Minimum Interfaces for ISP(Sign in required)

Beginner+10 Mana

TC39 Standard Decorators

Method & Field Decorators

Decorator Metadata & Legacy Comparison

Standard Decorator Arguments(Sign in required)

Intermediate+20 Mana

Decorator Context Type(Sign in required)

Advanced+30 Mana

Apply Class Decorator(Sign in required)

Intermediate+20 Mana

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18 interactive lessons and 18 hands-on challenges — learn in VS Code, Cursor, or the web.