Current File : /var/www/html/node_modules/date-fns/esm/startOfWeek/index.js
import toDate from "../toDate/index.js";
import toInteger from "../_lib/toInteger/index.js";
import requiredArgs from "../_lib/requiredArgs/index.js";
/**
* @name startOfWeek
* @category Week Helpers
* @summary Return the start of a week for the given date.
*
* @description
* Return the start of a week for the given date.
* The result will be in the local timezone.
*
* ### v2.0.0 breaking changes:
*
* - [Changes that are common for the whole library](https://github.com/date-fns/date-fns/blob/master/docs/upgradeGuide.md#Common-Changes).
*
* @param {Date|Number} date - the original date
* @param {Object} [options] - an object with options.
* @param {Locale} [options.locale=defaultLocale] - the locale object. See [Locale]{@link https://date-fns.org/docs/Locale}
* @param {0|1|2|3|4|5|6} [options.weekStartsOn=0] - the index of the first day of the week (0 - Sunday)
* @returns {Date} the start of a week
* @throws {TypeError} 1 argument required
* @throws {RangeError} `options.weekStartsOn` must be between 0 and 6
*
* @example
* // The start of a week for 2 September 2014 11:55:00:
* const result = startOfWeek(new Date(2014, 8, 2, 11, 55, 0))
* //=> Sun Aug 31 2014 00:00:00
*
* @example
* // If the week starts on Monday, the start of the week for 2 September 2014 11:55:00:
* const result = startOfWeek(new Date(2014, 8, 2, 11, 55, 0), { weekStartsOn: 1 })
* //=> Mon Sep 01 2014 00:00:00
*/
export default function startOfWeek(dirtyDate, dirtyOptions) {
requiredArgs(1, arguments);
var options = dirtyOptions || {};
var locale = options.locale;
var localeWeekStartsOn = locale && locale.options && locale.options.weekStartsOn;
var defaultWeekStartsOn = localeWeekStartsOn == null ? 0 : toInteger(localeWeekStartsOn);
var weekStartsOn = options.weekStartsOn == null ? defaultWeekStartsOn : toInteger(options.weekStartsOn); // Test if weekStartsOn is between 0 and 6 _and_ is not NaN
if (!(weekStartsOn >= 0 && weekStartsOn <= 6)) {
throw new RangeError('weekStartsOn must be between 0 and 6 inclusively');
}
var date = toDate(dirtyDate);
var day = date.getDay();
var diff = (day < weekStartsOn ? 7 : 0) + day - weekStartsOn;
date.setDate(date.getDate() - diff);
date.setHours(0, 0, 0, 0);
return date;
}
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