using an const array as a source for a string literal union

const weatherIcons = [
  'sun',
  'rain',
  'snow',
] as const

const weatherIcons = [
  'sun',
  'rain',
  'snow',
] as const

type Weather = {
  icon: typeof weatherIcons[number]
}

type Weather = {
  icon: typeof weatherIcons[number]
}