prototype inheritance javascript
function Animal (name, energy) {
this.name = name
this.energy = energy
}
Animal.prototype.eat = function (amount) {
console.log(`${this.name} is eating.`)
this.energy += amount
}
Animal.prototype.sleep = function (length) {
console.log(`${this.name} is sleeping.`)
this.energy += length
}
Animal.prototype.play = function (length) {
console.log(`${this.name} is playing.`)
this.energy -= length
}
function Dog (name, energy, breed) {
Animal.call(this, name, energy)
this.breed = breed
}
Dog.prototype = Object.create(Animal.prototype)
Dog.prototype.bark = function () {
console.log('Woof Woof!')
this.energy -= .1
}
const charlie = new Dog('Charlie', 10, 'Goldendoodle')
console.log(charlie.constructor)