// constructor function
function Animal(name) {
    this.name = name
}

// add speak() method to Animal.prototype
// so they can be inherited 
Animal.prototype.speak = function () {
    console.log(`${this.name} can speak.`)
}

// create an Animal object
const animal = new Animal("Bruce")
console.log(animal)
animal.speak()

// constructor function 
// that extends Animal
function Dog(name, breed) {
    Animal.call(this, name)
    this.breed = breed
}

// set Dog.prototype to inherit from Animal.prototype
Dog.prototype = Object.create(Animal.prototype)
Dog.prototype.constructor = Dog // reset the constructor property

// add bark() method to Dog.prototype
Dog.prototype.bark = function () {
    console.log("Woof!")
}

// create a Dog object
const dog = new Dog("Max", "Lab")
console.log(dog)
dog.speak() // inherited from Animal
dog.bark() // Dog-specific method