🔍 Overview
Chapter 8 explores how object-oriented programming (OOP) concepts are expressed through types. It connects traditional OOP principles with TypeScript’s type system, showing how types can model encapsulation, inheritance, and polymorphism.
💡 Key Concepts
- Classes and Interfaces: Introduces how TypeScript uses classes and interfaces to define object shapes and behavior.
- Encapsulation: Demonstrates how access modifiers like `private`, `protected`, and `public` control visibility and enforce boundaries.
- Inheritance: Explains how classes can extend other classes to reuse and specialize behavior.
- Polymorphism: Shows how subtypes can be used interchangeably with their supertypes to enable flexible design.
- Method Overriding: Covers how derived classes can redefine behavior from base classes.
- Interface Implementation: Highlights how interfaces define contracts that classes must fulfill.
🧭 Takeaway
Object-oriented programming remains a powerful paradigm, and TypeScript’s type system provides strong support for modeling OOP principles. Understanding how types enforce structure and behavior helps developers write clearer, more maintainable code.