Function invertDuration

packages/@internationalized/date/src/manipulation.ts:159–168

(duration: DateTimeDuration)

}

export function invertDuration(duration: DateTimeDuration): DateTimeDuration {
  let inverseDuration = {};
  for (let key in duration) {
    if (typeof duration[key] === 'number') {
      inverseDuration[key] = -duration[key];
    }
  }

  return inverseDuration;
}

export function subtract(date: CalendarDateTime, duration: DateTimeDuration): CalendarDateTime;
export function subtract(date: CalendarDate, duration: DateDuration): CalendarDate;