Marc Mintel
5397309103
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41 lines
1.2 KiB
Plaintext
41 lines
1.2 KiB
Plaintext
import { getISOWeek } from "./getISOWeek.js";
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import { toDate } from "./toDate.js";
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/**
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* The {@link setISOWeek} function options.
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*/
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/**
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* @name setISOWeek
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* @category ISO Week Helpers
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* @summary Set the ISO week to the given date.
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*
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* @description
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* Set the ISO week to the given date, saving the weekday number.
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*
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* ISO week-numbering year: http://en.wikipedia.org/wiki/ISO_week_date
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*
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* @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).
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* @typeParam ResultDate - The `Date` type of the context function.
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*
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* @param date - The date to be changed
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* @param week - The ISO week of the new date
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* @param options - An object with options
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*
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* @returns The new date with the ISO week set
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*
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* @example
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* // Set the 53rd ISO week to 7 August 2004:
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* const result = setISOWeek(new Date(2004, 7, 7), 53)
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* //=> Sat Jan 01 2005 00:00:00
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*/
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export function setISOWeek(date, week, options) {
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const _date = toDate(date, options?.in);
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const diff = getISOWeek(_date, options) - week;
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_date.setDate(_date.getDate() - diff * 7);
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return _date;
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}
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// Fallback for modularized imports:
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export default setISOWeek;
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