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-import getTimezoneOffsetInMilliseconds from "../_lib/getTimezoneOffsetInMilliseconds/index.js";
-import startOfISOWeek from "../startOfISOWeek/index.js";
-import requiredArgs from "../_lib/requiredArgs/index.js";
-var MILLISECONDS_IN_WEEK = 604800000;
-
-/**
- * @name differenceInCalendarISOWeeks
- * @category ISO Week Helpers
- * @summary Get the number of calendar ISO weeks between the given dates.
- *
- * @description
- * Get the number of calendar ISO weeks between the given dates.
- *
- * ISO week-numbering year: http://en.wikipedia.org/wiki/ISO_week_date
- *
- * @param {Date|Number} dateLeft - the later date
- * @param {Date|Number} dateRight - the earlier date
- * @returns {Number} the number of calendar ISO weeks
- * @throws {TypeError} 2 arguments required
- *
- * @example
- * // How many calendar ISO weeks are between 6 July 2014 and 21 July 2014?
- * const result = differenceInCalendarISOWeeks(
- * new Date(2014, 6, 21),
- * new Date(2014, 6, 6)
- * )
- * //=> 3
- */
-export default function differenceInCalendarISOWeeks(dirtyDateLeft, dirtyDateRight) {
- requiredArgs(2, arguments);
- var startOfISOWeekLeft = startOfISOWeek(dirtyDateLeft);
- var startOfISOWeekRight = startOfISOWeek(dirtyDateRight);
- var timestampLeft = startOfISOWeekLeft.getTime() - getTimezoneOffsetInMilliseconds(startOfISOWeekLeft);
- var timestampRight = startOfISOWeekRight.getTime() - getTimezoneOffsetInMilliseconds(startOfISOWeekRight);
-
- // Round the number of days to the nearest integer
- // because the number of milliseconds in a week is not constant
- // (e.g. it's different in the week of the daylight saving time clock shift)
- return Math.round((timestampLeft - timestampRight) / MILLISECONDS_IN_WEEK);
-} \ No newline at end of file
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