javascript inheritance

1function Animal (name, energy) {
2  this.name = name
3  this.energy = energy
4}
5
6Animal.prototype.eat = function (amount) {
7  console.log(`${this.name} is eating.`)
8  this.energy += amount
9}
10
11Animal.prototype.sleep = function (length) {
12  console.log(`${this.name} is sleeping.`)
13  this.energy += length
14}
15
16Animal.prototype.play = function (length) {
17  console.log(`${this.name} is playing.`)
18  this.energy -= length
19}
20
21function Dog (name, energy, breed) {
22  Animal.call(this, name, energy)
23
24  this.breed = breed
25}
26
27Dog.prototype = Object.create(Animal.prototype)
28
29Dog.prototype.bark = function () {
30  console.log('Woof Woof!')
31  this.energy -= .1
32}
33
34const charlie = new Dog('Charlie', 10, 'Goldendoodle')
35console.log(charlie.constructor)

1// Class Inheritance in JavaScript
2class Mammal {
3	constructor(name) {
4		this.name = name;
5	}
6	eats() {
7		return `${this.name} eats Food`;
8	}
9}
10
11class Dog extends Mammal {
12	constructor(name, owner) {
13		super(name);
14		this.owner = owner;
15	}
16	eats() {
17		return `${this.name} eats Chicken`;
18	}
19}
20
21let myDog = new Dog("Spot", "John");
22console.log(myDog.eats()); // Spot eats chicken

1class child_class_name extends parent_class_name
2

1class Animal {
2   null
3}
4class tiger extends Animal {
5 null }

1class childClass extends parentClass
2{
3  
4}

1function Teacher(first, last, age, gender, interests, subject) {
2  Person.call(this, first, last, age, gender, interests);
3
4  this.subject = subject;
5}