JavaScript? ?? ?? ?????(OOP)

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1. ??? ???

JavaScript?? ??? ?-? ?(?? ? ???)? ?????. ???? ??? ???? ?? ??? ??? ???.

?:

// Define a class
class Person {
  constructor(name, age) {
    this.name = name; // Property
    this.age = age;
  }

  greet() { // Method
    console.log(`Hello, my name is ${this.name} and I am ${this.age} years old.`);
  }
}

// Create an object
const person1 = new Person('Alice', 25);
person1.greet(); // Output: Hello, my name is Alice and I am 25 years old.

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2. ???

???? ???(??)? ???? ???? ???? ?? ??(??) ?? ?? ?? ?????. ??? ?? ??? ?? ???? ??? ?????.

?:

class BankAccount {
  #balance; // Private field

  constructor(initialBalance) {
    this.#balance = initialBalance;
  }

  deposit(amount) {
    this.#balance += amount;
  }

  getBalance() {
    return this.#balance;
  }
}

const account = new BankAccount(1000);
account.deposit(500);
console.log(account.getBalance()); // 1500
// console.log(account.#balance); // Error: Private field '#balance' not accessible

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3. ??

??? ?? ???? ?? ???? ??? ???? ???? ? ????. ?? ??? ????? ? ??? ???.

?:

class Animal {
  constructor(name) {
    this.name = name;
  }

  speak() {
    console.log(`${this.name} makes a noise.`);
  }
}

class Dog extends Animal {
  speak() {
    console.log(`${this.name} barks.`);
  }
}

const dog = new Dog('Buddy');
dog.speak(); // Output: Buddy barks.

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4. ???

????? ?? ??? ???? ????. OOP??? ?? ???? ???? ?? ???? ???? ??? ??? ???? ??? ????? ?????.

?:

class Shape {
  area() {
    return 0;
  }
}

class Rectangle extends Shape {
  constructor(width, height) {
    super();
    this.width = width;
    this.height = height;
  }
  area() {
    return this.width * this.height;
  }
}

const shape = new Shape();
const rectangle = new Rectangle(10, 5);

console.log(shape.area());       // 0
console.log(rectangle.area());   // 50

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5. ???

???? ??? ???? ??? ????? ? ??? ??? ?????.

?:

class Vehicle {
  startEngine() {
    console.log('Engine started');
  }
}

class Car extends Vehicle {
  drive() {
    console.log('Driving the car...');
  }
}

const car = new Car();
car.startEngine(); // Engine started
car.drive();       // Driving the car...

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6. ?? ??? ? ??

?? ???? ??? ????? ?? ??? ??? ????.

?:

class MathUtils {
  static add(a, b) {
    return a + b;
  }
}

console.log(MathUtils.add(5, 3)); // 8

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7. ?????

JavaScript? ??? ?? ????? ??? ???? ??? ? ?? ????? ?? ?? ??? ?????.

?:

function Person(name) {
  this.name = name;
}

Person.prototype.greet = function() {
  console.log(`Hello, my name is ${this.name}`);
};

const person = new Person('Alice');
person.greet(); // Hello, my name is Alice

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?? ???

1. ???? ???? ??? ?? ???? ????.
2. #? ???? ??? ??? ??? ??????.
3. ??? ?????? ??(??)? ?????.
4. ???? ?? ??? ??.
5. ???? ???? ????? ??????.
6. ?? ???? ????? ??? ?????.

JavaScript? OOP ??? ?? ???? ???? ????? ??? ??? ??? ??? ? ????.

?????. ?? Abhay Singh Kathayat???!
?? ?????? ??? ?? ??? ?? ?? ??? ?? ??? ??????. ?? ????? ?? ???? ??? ???? ??????? ???? ?? ??? ????? ??? ?????? ???? ?????.
? ???? ???(kaashshorts28@gmail.com)? ???? ?????.

? ??? JavaScript? ?? ?? ?????(OOP): ?? ???? ?? ?????. ??? ??? PHP ??? ????? ?? ?? ??? ?????!