Function startOfMonth

pkgs/core/src/startOfMonth/index.ts:34–45

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

 * //=> Mon Sep 01 2014 00:00:00
 */
export function startOfMonth<
  DateType extends Date,
  ResultDate extends Date = DateType,
>(
  date: DateArg<DateType>,
  options?: StartOfMonthOptions<ResultDate> | undefined,
): ResultDate {
  const _date = toDate(date, options?.in);
  _date.setDate(1);
  _date.setHours(0, 0, 0, 0);
  return _date;
}