Function getDaysInMonth

pkgs/core/src/getDaysInMonth/index.ts:28–39

(
  date: DateArg<Date> & {},
  options?: GetDaysInMonthOptions | undefined,
)

 * //=> 29
 */
export function getDaysInMonth(
  date: DateArg<Date> & {},
  options?: GetDaysInMonthOptions | undefined,
): number {
  const _date = toDate(date, options?.in);
  const year = _date.getFullYear();
  const monthIndex = _date.getMonth();
  const lastDayOfMonth = constructFrom(_date, 0);
  lastDayOfMonth.setFullYear(year, monthIndex + 1, 0);
  lastDayOfMonth.setHours(0, 0, 0, 0);
  return lastDayOfMonth.getDate();
}