prototype_inheritance.js

// In JavaScript, every object has an internal link to another object called its prototype. When you try to access a property or method on an object, and it doesn’t exist there, JavaScript looks up the prototype chain.
function Animal(name) {
    this.name = name;
  }
  
  Animal.prototype.speak = function () {
    console.log(`${this.name} makes a sound.`);
  };
  
  function Dog(name, breed) {
    Animal.call(this, name); // Inherit properties
    this.breed = breed;
  }
  
//   // Inherit methods from Animal
//   Dog.prototype = Object.create(Animal.prototype);
//   Dog.prototype.constructor = Dog;
  
//   // Override method
//   Dog.prototype.speak = function () {
//     console.log(`${this.name} barks. It is a ${this.breed}.`);
//   };
  

const dog1 = new Dog('Tommy', 'Beagle');
dog1.speak(); // Tommy barks. It is a Beagle.