design_pattern3.js

var carFactory = new VehicleFactory();
var car = carFactory.createVehicle({
  vehicleType: "car",
  color: "yellow",
  doors: 6,  
});

console.log(car instanceof Car); // true

console.log(car); // Car object of color "yellow", doors: 6 in a "brand new" state

var movingTruck = carFactory.createVehicle({
  vehicleType: "truck",
  state: "like new",
  color: "red",
  wheelSize: "small"
});

console.log(movingTruck instanceof Truck); // true

console.log(movingTruck); // Truck object of color "red", a "like new" state and a "small" wheelSize