Classes & Objects — Series 3

class Temperature {
  constructor(celsius) {
    this.celsius = celsius;
  }
  get fahrenheit() {
    return this.celsius * 9 / 5 + 32;
  }
  set fahrenheit(f) {
    this.celsius = (f - 32) * 5 / 9;
  }
}

const t = new Temperature(0);
console.log(t.fahrenheit);
t.fahrenheit = 212;
console.log(t.celsius);

class User {
  role = 'guest';
  constructor(role) {
    this.role = role;
  }
}

console.log(new User('admin').role, new User(undefined).role);

class Animal {}
class Dog extends Animal {}

const d = new Dog();
console.log(d.constructor === Dog, d.constructor === Animal, Object.getPrototypeOf(Dog) === Animal);