29 lines
1.1 KiB
JavaScript
29 lines
1.1 KiB
JavaScript
import startOfISOWeekYear from "../startOfISOWeekYear/index.js";
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import requiredArgs from "../_lib/requiredArgs/index.js";
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/**
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* @name isSameISOWeekYear
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* @category ISO Week-Numbering Year Helpers
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* @summary Are the given dates in the same ISO week-numbering year?
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*
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* @description
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* Are the given dates in the same ISO week-numbering year?
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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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* @param {Date|Number} dateLeft - the first date to check
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* @param {Date|Number} dateRight - the second date to check
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* @returns {Boolean} the dates are in the same ISO week-numbering year
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* @throws {TypeError} 2 arguments required
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*
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* @example
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* // Are 29 December 2003 and 2 January 2005 in the same ISO week-numbering year?
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* const result = isSameISOWeekYear(new Date(2003, 11, 29), new Date(2005, 0, 2))
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* //=> true
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*/
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export default function isSameISOWeekYear(dirtyDateLeft, dirtyDateRight) {
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requiredArgs(2, arguments);
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var dateLeftStartOfYear = startOfISOWeekYear(dirtyDateLeft);
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var dateRightStartOfYear = startOfISOWeekYear(dirtyDateRight);
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return dateLeftStartOfYear.getTime() === dateRightStartOfYear.getTime();
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} |