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33 lines
1.0 KiB
33 lines
1.0 KiB
3 years ago
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import startOfWeek from '../startOfWeek/index.js';
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import requiredArgs from '../_lib/requiredArgs/index.js';
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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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* ### 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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* @returns {Date} the start of an ISO week
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* @throws {TypeError} 1 argument required
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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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* var 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 default function startOfISOWeek(dirtyDate) {
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requiredArgs(1, arguments);
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return startOfWeek(dirtyDate, {
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weekStartsOn: 1
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});
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}
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