Function cycleTime

packages/@internationalized/date/src/manipulation.ts:378–413

(
  value: Time | CalendarDateTime,
  field: TimeField,
  amount: number,
  options?: CycleTimeOptions
)

  options?: CycleTimeOptions
): Time;
export function cycleTime(
  value: Time | CalendarDateTime,
  field: TimeField,
  amount: number,
  options?: CycleTimeOptions
): Mutable<Time | CalendarDateTime> {
  let mutable: Mutable<Time | CalendarDateTime> = value.copy();

  switch (field) {
    case 'hour': {
      let hours = value.hour;
      let min = 0;
      let max = 23;
      if (options?.hourCycle === 12) {
        let isPM = hours >= 12;
        min = isPM ? 12 : 0;
        max = isPM ? 23 : 11;
      }
      mutable.hour = cycleValue(hours, amount, min, max, options?.round);
      break;
    }
    case 'minute':
      mutable.minute = cycleValue(value.minute, amount, 0, 59, options?.round);
      break;
    case 'second':
      mutable.second = cycleValue(value.second, amount, 0, 59, options?.round);
      break;
    case 'millisecond':
      mutable.millisecond = cycleValue(value.millisecond, amount, 0, 999, options?.round);
      break;
    default:
      throw new Error('Unsupported field ' + field);
  }

  return mutable;
}

function cycleValue(value: number, amount: number, min: number, max: number, round = false) {
  if (round) {