????? ?? ??? ???! ??? PHP? ??? ?? ??? ???? ?, JavaScript? ????? ??? ???? ?? ?? ???? ?? ?? ??? ? ?????. ?? ?? JavaScript? ???? ??? ??? ?? ?? ??? ?? ?? ?? ??? ???? ????.

?? - ??? ?????

???? ???? PHP? Java? ?? JavaScript? ?????? ?????. JavaScript? ?? ???? "?????"??? ?? ??? ?? ?? ??? ????. ?? ?? ?????? ??????. ??? ???? ?? ??? ?????? ?? JavaScript? ??? ??????? ?? ??? ????.

const pet = {
  makeSound() {
    return "Some generic sound";
  }
};

const cat = {
  purr() {
    return "Purrrr";
  }
};

// Set pet as the prototype of cat
Object.setPrototypeOf(cat, pet);

// Now cat can use methods from pet
console.log(cat.makeSound()); // "Some generic sound"
console.log(cat.purr());      // "Purrrr"

??? ?? - ? ????

?? ???????. ?????? ?? ?????? ?? ? ??? ?? "????? ??"??? ????. JavaScript? ??? ?? ??? null ?????? ??? ??? ? ??? ?? ????.

const animal = {
  eat() {
    return "Nom nom nom";
  }
};

const pet = {
  makeSound() {
    return "Some generic sound";
  }
};

const cat = {
  purr() {
    return "Purrrr";
  }
};

Object.setPrototypeOf(pet, animal);
Object.setPrototypeOf(cat, pet);

// cat can now access methods from both pet and animal
console.log(cat.purr());      // "Purrrr"
console.log(cat.makeSound()); // "Some generic sound"
console.log(cat.eat());       // "Nom nom nom"

??? ?? - ?? ??? ?? ??

PHP? ?? ??? ?? ??? ????? ??? ??? ? ??? ????.

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

Animal.prototype.eat = function() {
  return `${this.name} is eating`;
};

function Cat(name) {
  Animal.call(this, name);
}

// Set up inheritance
Cat.prototype = Object.create(Animal.prototype);
Cat.prototype.constructor = Cat;

Cat.prototype.purr = function() {
  return `${this.name} says purrrr`;
};

const felix = new Cat("Felix");
console.log(felix.eat());  // "Felix is eating"
console.log(felix.purr()); // "Felix says purrrr"

?? JavaScript - ?? ???

ES6?? PHP ????? ??? ?? ? ?? ??? ??? ???????. ??? ?? ???. ????? ??? ?? ??? ?? ??? ????.

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

  eat() {
    return `${this.name} is eating`;
  }
}

class Cat extends Animal {
  purr() {
    return `${this.name} says purrrr`;
  }
}

const felix = new Cat("Felix");

???? ?? ???? ?

??? PHP? JavaScript? ?? ????? ?? ? ?? ?? ??? ????.

1. ??? ?? ???? ??? ?????
2. ????? ??? ?? ????? - ?? ??? ??? ???? ? ????
3. ? ??? ??? ?? ??? ??? ???? ???? ???? ?????? ?????
4. ?? ??? ???? ??? ?? ?? ??? ??? ?????

???

????? ??? ???? ?? ???? ???? ??? ? ????. ?? PHP? Java? ???? ???? ?? ?????. ??? ?? ??? ?? ???? ???? ?? ???? ? ????. ?? ?? ?? ?????? ?? ??? ???? ??? JavaScript ?? ? ?????.

JavaScript ??? ???? ???? ??? ??? ?? ???? ??? ??? ?????. ???? ???? ?? ????!

? ??? JavaScript? ????? ?? ?? - ??? ???? ?? ?????. ??? ??? PHP ??? ????? ?? ?? ??? ?????!