class User { constructor(name) { this.name = name; } sayHello() { console.log(this.name); } } let user = new User("Laurence"); user.sayHello(); class Animal { constructor(species, sounds) { this.species = species; this.sounds = sounds } speak() { console.log(this.species + ' ' + this.sounds); } } Animal.prototype.eat = function () { return this.species + ' is eating'; } let cat = new Animal('cat', 'meow'); let dog = new Animal('dog', 'bark'); cat.speak(); console.log(dog.eat()); console.log(dog); class Menu { #offer1 = 10; #offer2 = 20; constructor(val1, val2) { this.val1 = val1; this.val2 = val2; } get total(){ return this.calTotal(); } calTotal(){ return (this.val1 * this.#offer1) + (this.val2 * this.#offer2); } } const val1 = new Menu(2,0); const val2 = new Menu(1,3); const val3 = new Menu(3,2); console.log(val1.total); console.log(val2.total); console.log(val3.total); class Employee { constructor(first, last, years) { this.first = first; this.last = last; this.years = years; } } const person1 = new Employee('Laurence', 'Svekis', 10); const person2 = new Employee('Jane', 'Doe', 5); const workers = [person1, person2]; workers.forEach((person) => { console.log(person.first + ' ' + person.last + ' has worked here ' + person.years + ' years'); })