30 lines
1.3 KiB
JavaScript
30 lines
1.3 KiB
JavaScript
import toInteger from "../_lib/toInteger/index.js";
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import getISOWeekYear from "../getISOWeekYear/index.js";
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import setISOWeekYear from "../setISOWeekYear/index.js";
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import requiredArgs from "../_lib/requiredArgs/index.js";
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/**
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* @name addISOWeekYears
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* @category ISO Week-Numbering Year Helpers
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* @summary Add the specified number of ISO week-numbering years to the given date.
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*
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* @description
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* Add the specified number of ISO week-numbering years to the given date.
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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} date - the date to be changed
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* @param {Number} amount - the amount of ISO week-numbering years to be added. Positive decimals will be rounded using `Math.floor`, decimals less than zero will be rounded using `Math.ceil`.
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* @returns {Date} the new date with the ISO week-numbering years added
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* @throws {TypeError} 2 arguments required
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*
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* @example
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* // Add 5 ISO week-numbering years to 2 July 2010:
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* const result = addISOWeekYears(new Date(2010, 6, 2), 5)
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* //=> Fri Jun 26 2015 00:00:00
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*/
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export default function addISOWeekYears(dirtyDate, dirtyAmount) {
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requiredArgs(2, arguments);
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var amount = toInteger(dirtyAmount);
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return setISOWeekYear(dirtyDate, getISOWeekYear(dirtyDate) + amount);
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} |