import { toDate } from "./toDate.mjs"; import { getDefaultOptions } from "./_lib/defaultOptions.mjs"; /** * The {@link lastDayOfWeek} function options. */ /** * @name lastDayOfWeek * @category Week Helpers * @summary Return the last day of a week for the given date. * * @description * Return the last day of a week for the given date. * The result will be in the local timezone. * * @typeParam DateType - The `Date` type, the function operates on. Gets inferred from passed arguments. Allows to use extensions like [`UTCDate`](https://github.com/date-fns/utc). * * @param date - The original date * @param options - An object with options * * @returns The last day of a week * * @example * // The last day of a week for 2 September 2014 11:55:00: * const result = lastDayOfWeek(new Date(2014, 8, 2, 11, 55, 0)) * //=> Sat Sep 06 2014 00:00:00 * * @example * // If the week starts on Monday, the last day of the week for 2 September 2014 11:55:00: * const result = lastDayOfWeek(new Date(2014, 8, 2, 11, 55, 0), { weekStartsOn: 1 }) * //=> Sun Sep 07 2014 00:00:00 */ export function lastDayOfWeek(date, options) { const defaultOptions = getDefaultOptions(); const weekStartsOn = options?.weekStartsOn ?? options?.locale?.options?.weekStartsOn ?? defaultOptions.weekStartsOn ?? defaultOptions.locale?.options?.weekStartsOn ?? 0; const _date = toDate(date); const day = _date.getDay(); const diff = (day < weekStartsOn ? -7 : 0) + 6 - (day - weekStartsOn); _date.setHours(0, 0, 0, 0); _date.setDate(_date.getDate() + diff); return _date; } // Fallback for modularized imports: export default lastDayOfWeek;