Class with chaining methods example

index.js

function Menu() {
  this.items = [];  
}

Menu.prototype.addItem = function(item) {
  this.items.push(item);
  return this; // This allows for chaining
}

Menu.prototype.showMenu = function() {
  return this.items;
}

// Implementation

const menu = new Menu();

menu.addItem('Soup').addItem('Garlic Bread').addItem('Pizza');

menu.showMenu(); // ['Soup', 'Garlic Bread', 'Pizza']