Current File : /var/www/html/node_modules/date-fns/esm/subISOWeekYears/index.js
import toInteger from "../_lib/toInteger/index.js";
import addISOWeekYears from "../addISOWeekYears/index.js";
import requiredArgs from "../_lib/requiredArgs/index.js";
/**
* @name subISOWeekYears
* @category ISO Week-Numbering Year Helpers
* @summary Subtract the specified number of ISO week-numbering years from the given date.
*
* @description
* Subtract the specified number of ISO week-numbering years from the given date.
*
* ISO week-numbering year: http://en.wikipedia.org/wiki/ISO_week_date
*
* ### v2.0.0 breaking changes:
*
* - [Changes that are common for the whole library](https://github.com/date-fns/date-fns/blob/master/docs/upgradeGuide.md#Common-Changes).
*
* - The function was renamed from `subISOYears` to `subISOWeekYears`.
* "ISO week year" is short for [ISO week-numbering year](https://en.wikipedia.org/wiki/ISO_week_date).
* This change makes the name consistent with
* locale-dependent week-numbering year helpers, e.g., `setWeekYear`.
*
* @param {Date|Number} date - the date to be changed
* @param {Number} amount - the amount of ISO week-numbering years to be subtracted. Positive decimals will be rounded using `Math.floor`, decimals less than zero will be rounded using `Math.ceil`.
* @returns {Date} the new date with the ISO week-numbering years subtracted
* @throws {TypeError} 2 arguments required
*
* @example
* // Subtract 5 ISO week-numbering years from 1 September 2014:
* const result = subISOWeekYears(new Date(2014, 8, 1), 5)
* //=> Mon Aug 31 2009 00:00:00
*/
export default function subISOWeekYears(dirtyDate, dirtyAmount) {
requiredArgs(2, arguments);
var amount = toInteger(dirtyAmount);
return addISOWeekYears(dirtyDate, -amount);
}
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