26 lines
869 B
TypeScript
26 lines
869 B
TypeScript
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/**
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* @name startOfISOWeek
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* @category ISO Week Helpers
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* @summary Return the start of an ISO week for the given date.
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*
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* @description
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* Return the start of an ISO 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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* 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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*
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* @param date - The original date
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*
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* @returns The start of an ISO week
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*
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* @example
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* // The start of an ISO week for 2 September 2014 11:55:00:
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* const result = startOfISOWeek(new Date(2014, 8, 2, 11, 55, 0))
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* //=> Mon Sep 01 2014 00:00:00
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*/
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export declare function startOfISOWeek<DateType extends Date>(
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date: DateType | number | string,
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): DateType;
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