OOP Introduction

Relax. We'll talk through this in plain words — no textbook voice.

Object-Oriented Programming (OOP) in JavaScript is a way to build objects from blueprints (classes) and boost code reusability.

🎯 OOP Principles:

• Encapsulation: Bundling data and methods together into a single object

• Inheritance: A child class picking up properties from a parent class

• Polymorphism: Using methods in different ways depending on the context

• Abstraction: Hiding away complex details

javascript

// Constructor function (Old way)
function Person(name, age) {
    this.name = name;
    this.age = age;
    this.greet = function() {
        return `Hello, I'm ${this.name}`;
    };
}

const person1 = new Person("Aung Kyaw", 25);
console.log(person1.greet());
console.log(`Age: ${person1.age}`);

// ES6 Class (Modern way)
class Animal {
    constructor(name) {
        this.name = name;
    }
    speak() {
        return `${this.name} makes a sound`;
    }
}

const dog = new Animal("Buddy");
console.log(dog.speak());

You should see

Hello, I'm Aung Kyaw Age: 25 Buddy makes a sound