Function elapsedTime

src/duration.ts:107–129

(date: Date, precision: Unit = 'second', now = Date.now())

}

export function elapsedTime(date: Date, precision: Unit = 'second', now = Date.now()): Duration {
  const delta = date.getTime() - now
  if (delta === 0) return new Duration()
  const sign = Math.sign(delta)
  const ms = Math.abs(delta)
  const sec = Math.floor(ms / 1000)
  const min = Math.floor(sec / 60)
  const hr = Math.floor(min / 60)
  const day = Math.floor(hr / 24)
  const month = Math.floor(day / 30)
  const year = Math.floor(month / 12)
  const i = unitNames.indexOf(precision) || unitNames.length
  return new Duration(
    i >= 0 ? year * sign : 0,
    i >= 1 ? (month - year * 12) * sign : 0,
    0,
    i >= 3 ? (day - month * 30) * sign : 0,
    i >= 4 ? (hr - day * 24) * sign : 0,
    i >= 5 ? (min - hr * 60) * sign : 0,
    i >= 6 ? (sec - min * 60) * sign : 0,
    i >= 7 ? (ms - sec * 1000) * sign : 0,
  )
}

interface RoundingOpts {
  relativeTo: Date | number