Function endOfISOWeekYear

pkgs/core/src/endOfISOWeekYear/index.ts:38–52

(
  date: DateArg<DateType>,
  options?: EndOfISOWeekYearOptions<ResultDate> | undefined,
)

 * //=> Sun Jan 01 2006 23:59:59.999
 */
export function endOfISOWeekYear<
  DateType extends Date,
  ResultDate extends Date = DateType,
>(
  date: DateArg<DateType>,
  options?: EndOfISOWeekYearOptions<ResultDate> | undefined,
): ResultDate {
  const year = getISOWeekYear(date, options);
  const fourthOfJanuaryOfNextYear = constructFrom(options?.in || date, 0);
  fourthOfJanuaryOfNextYear.setFullYear(year + 1, 0, 4);
  fourthOfJanuaryOfNextYear.setHours(0, 0, 0, 0);
  const _date = startOfISOWeek(fourthOfJanuaryOfNextYear, options);
  _date.setMilliseconds(_date.getMilliseconds() - 1);
  return _date;
}