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// This file is generated automatically by `scripts/build/typings.js`. Please, don't change it.
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import { startOfWeek } from 'date-fns'
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export default startOfWeek
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import toDate from '../toDate/index.js';
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import toInteger from '../_lib/toInteger/index.js';
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/**
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* @name startOfWeek
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* @category Week Helpers
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* @summary Return the start of a week for the given date.
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*
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* @description
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* Return the start of a week for the given date.
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* The result will be in the local timezone.
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*
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* ### v2.0.0 breaking changes:
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*
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* - [Changes that are common for the whole library](https://github.com/date-fns/date-fns/blob/master/docs/upgradeGuide.md#Common-Changes).
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*
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* @param {Date|Number} date - the original date
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* @param {Object} [options] - an object with options.
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* @param {Locale} [options.locale=defaultLocale] - the locale object. See [Locale]{@link https://date-fns.org/docs/Locale}
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* @param {0|1|2|3|4|5|6} [options.weekStartsOn=0] - the index of the first day of the week (0 - Sunday)
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* @returns {Date} the start of a week
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* @throws {TypeError} 1 argument required
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* @throws {RangeError} `options.weekStartsOn` must be between 0 and 6
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*
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* @example
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* // The start of a week for 2 September 2014 11:55:00:
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* var result = startOfWeek(new Date(2014, 8, 2, 11, 55, 0))
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* //=> Sun Aug 31 2014 00:00:00
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*
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* @example
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* // If the week starts on Monday, the start of the week for 2 September 2014 11:55:00:
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* var result = startOfWeek(new Date(2014, 8, 2, 11, 55, 0), { weekStartsOn: 1 })
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* //=> Mon Sep 01 2014 00:00:00
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*/
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export default function startOfWeek(dirtyDate, dirtyOptions) {
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if (arguments.length < 1) {
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throw new TypeError('1 argument required, but only ' + arguments.length + ' present');
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}
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var options = dirtyOptions || {};
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var locale = options.locale;
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var localeWeekStartsOn = locale && locale.options && locale.options.weekStartsOn;
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var defaultWeekStartsOn = localeWeekStartsOn == null ? 0 : toInteger(localeWeekStartsOn);
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var weekStartsOn = options.weekStartsOn == null ? defaultWeekStartsOn : toInteger(options.weekStartsOn); // Test if weekStartsOn is between 0 and 6 _and_ is not NaN
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if (!(weekStartsOn >= 0 && weekStartsOn <= 6)) {
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throw new RangeError('weekStartsOn must be between 0 and 6 inclusively');
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}
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var date = toDate(dirtyDate);
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var day = date.getDay();
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var diff = (day < weekStartsOn ? 7 : 0) + day - weekStartsOn;
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date.setDate(date.getDate() - diff);
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date.setHours(0, 0, 0, 0);
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return date;
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}
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// @flow
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// This file is generated automatically by `scripts/build/typings.js`. Please, don't change it.
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export type Interval = {
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start: Date | number,
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end: Date | number
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}
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export type Locale = {
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formatDistance: (...args: Array<any>) => any,
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formatRelative: (...args: Array<any>) => any,
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localize: {
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ordinalNumber: (...args: Array<any>) => any,
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era: (...args: Array<any>) => any,
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quarter: (...args: Array<any>) => any,
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month: (...args: Array<any>) => any,
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day: (...args: Array<any>) => any,
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dayPeriod: (...args: Array<any>) => any
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},
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formatLong: Object,
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date: (...args: Array<any>) => any,
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time: (...args: Array<any>) => any,
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dateTime: (...args: Array<any>) => any,
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match: {
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ordinalNumber: (...args: Array<any>) => any,
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era: (...args: Array<any>) => any,
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quarter: (...args: Array<any>) => any,
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month: (...args: Array<any>) => any,
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day: (...args: Array<any>) => any,
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dayPeriod: (...args: Array<any>) => any
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},
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options?: {
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weekStartsOn?: 0 | 1 | 2 | 3 | 4 | 5 | 6,
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firstWeekContainsDate?: 1 | 2 | 3 | 4 | 5 | 6 | 7
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}
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}
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declare module.exports: (
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date: Date | number,
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options?: {
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locale?: Locale,
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weekStartsOn?: 0 | 1 | 2 | 3 | 4 | 5 | 6
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}
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) => Date
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{
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"sideEffects": false,
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"typings": "../../typings.d.ts"
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}
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