Function setMonth

pkgs/core/src/setMonth/index.ts:35–55

(
  date: DateArg<DateType>,
  month: number,
  options?: SetMonthOptions<ResultDate> | undefined,
)

 * //=> Sat Feb 01 2014 00:00:00
 */
export function setMonth<
  DateType extends Date,
  ResultDate extends Date = DateType,
>(
  date: DateArg<DateType>,
  month: number,
  options?: SetMonthOptions<ResultDate> | undefined,
): ResultDate {
  const _date = toDate(date, options?.in);
  const year = _date.getFullYear();
  const day = _date.getDate();

  const midMonth = constructFrom(options?.in || date, 0);
  midMonth.setFullYear(year, month, 15);
  midMonth.setHours(0, 0, 0, 0);
  const daysInMonth = getDaysInMonth(midMonth);

  // Set the earlier date, allows to wrap Jan 31 to Feb 28
  _date.setMonth(month, Math.min(day, daysInMonth));
  return _date;
}