16 OOP - Classes and Objects in TypeScript
🏗️ TypeScript Essentials #16 OOP with Classes & Objects: Structure Meets Power
In this episode, we dive into the heart of Object-Oriented Programming (OOP) in TypeScript—exploring how to build reusable, structured, and scalable code using classes and objects. Whether you're modeling real-world entities or architecting automation frameworks, this tutorial gives you the blueprint for clean and maintainable design.
🎯 What You’ll Learn:
🧱 Declaring Classes
→ Syntax:
class User {
name: string;
constructor(name: string) {
this.name = name;
}
greet() {
return `Hello, ${this.name}`;
}
}
→ Encapsulate properties and behaviors in a single unit
🧍♂️ Creating Objects (Instances)
→ Use new to instantiate classes:
const user1 = new User('Omar');
→ Each object has its own state and access to class methods
🔐 Access Modifiers: public, private, protected
→ Control visibility and encapsulation
→ Example:
class Account {
private balance: number = 0;
public deposit(amount: number) {
this.balance += amount;
}
}
🧠 Readonly & Parameter Properties
→ Use readonly to lock values after initialization
→ Declare and assign properties directly in the constructor
🧬 Real-World Use Cases
Modeling users, products, and transactions
Structuring automation test components
Building reusable services and utilities
Creating domain-driven designs for scalable apps
⚠️ Best Practices
→ Keep classes focused—one responsibility per class
→ Use interfaces to define contracts
→ Prefer composition over inheritance when possible
#typescript #OOP #ClassesAndObjects #TSBasics #FrontendDev #AutomationTesting #SDET #PlaywrightQA #TypeScriptTutorial #QAEngineering
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