Generate a randomised JSON array of cars

cars.js

// randomise function
const random = (...list) => list[Math.floor(Math.random() * list.length)]

// create random numbers within a range
const getRandomInt = (min, max) => {
  min = Math.ceil(min);
  max = Math.floor(max);
  return Math.floor(Math.random() * (max - min + 1)) + min;
}

// display function
const generate = (length, template) => console.log(
  JSON.stringify(
    [...Array(length)].map(template)
    , null, 2)
)

// Iteration function that generates every item
const template = (item, i) => ({
  _id: i,
  make: random('Volvo', 'BMW', 'Tesla'),
  colour: random('Red', 'Blue', 'Black', 'White', 'Silver'),
  year: getRandomInt(2000, 2019),
  price: getRandomInt(30000, 100000),
  // We can choose the model based on the make
  get model() {
    switch (this.make) {
      case 'BMW': return random('3-series', '5-series')
      case 'Tesla': return random('3', 'S', 'X')
      case 'Volvo': return random('XC60', 'XC90')
    }
  },
  // We can choose the drivetrain based on the make
  get drivetrain() {
    switch (this.make) {
      case 'Tesla': return 'Electric'
      default: return random('Hybrid', 'Diesel', 'Petrol')
    }
  }
})

// make 10 random cars
generate(10, template)