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import getISOWeekYear from '../getISOWeekYear/index.ts'import requiredArgs from '../_lib/requiredArgs/index.ts'
/** * @name differenceInCalendarISOWeekYears * @category ISO Week-Numbering Year Helpers * @summary Get the number of calendar ISO week-numbering years between the given dates. * * @description * Get the number of calendar ISO week-numbering years between the given dates. * * 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 `differenceInCalendarISOYears` to `differenceInCalendarISOWeekYears`. *   "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., `addWeekYears`. * * @param {Date|Number} dateLeft - the later date * @param {Date|Number} dateRight - the earlier date * @returns {Number} the number of calendar ISO week-numbering years * @throws {TypeError} 2 arguments required * * @example * // How many calendar ISO week-numbering years are 1 January 2010 and 1 January 2012? * const result = differenceInCalendarISOWeekYears( *   new Date(2012, 0, 1), *   new Date(2010, 0, 1) * ) * //=> 2 */export default function differenceInCalendarISOWeekYears(  dirtyDateLeft: Date | number,  dirtyDateRight: Date | number): number {  requiredArgs(2, arguments)
  return getISOWeekYear(dirtyDateLeft) - getISOWeekYear(dirtyDateRight)}