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🧠 TypeScript Essentials #21 Abstraction: Abstract Properties & Methods Explained In this episode, we explore how abstraction works in TypeScript—using abstract classes, abstract methods, and abstract properties to define blueprints for scalable, maintainable code. Whether you're designing automation components, service layers, or reusable models, abstraction helps you enforce contracts and reduce duplication. 🎯 What You’ll Learn: - 🧱 What Is Abstraction in TypeScript? → A design principle that hides implementation details and exposes only essential behavior → Achieved using abstract classes and members - 🔧 Abstract Methods → Declared without implementation in the base class → Must be implemented by derived classes → Example: abstract class Animal { abstract makeSound(): void; move(): void { console.log('Moving...'); } } - 🧩 Abstract Properties → Define required properties without assigning values → Enforced in child classes for consistent structure → Example: abstract class Shape { abstract readonly name: string; abstract area(): number; } class Circle extends Shape { readonly name = 'Circle'; constructor(public radius: number) {} area(): number { return Math.PI * this.radius ** 2; } } - 🛡️ Why Use Abstraction? → Enforces consistency across implementations → Promotes clean architecture and separation of concerns → Ideal for designing extensible automation frameworks and APIs - 🧪 Real-World Use Cases - Defining base test components with required actions - Modeling shapes, users, or services with shared contracts - Creating plugin systems or strategy patterns - Structuring business logic with predictable interfaces - ⚠️ Best Practices → Use abstract classes when you need partial implementation + enforced structure → Prefer interfaces for pure contracts without logic → Keep abstract members focused and meaningful #typescript #Abstraction #AbstractClass #AbstractMethod #AbstractProperty #OOP #TSBasics #AutomationTesting #SDET #PlaywrightQA #TypeScriptTutorial #QAEngineering