bc518174
 王天杨
提交两个项目文件
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"use strict";
exports.differenceInWeeks = differenceInWeeks;
var _index = require("./_lib/getRoundingMethod.js");
var _index2 = require("./differenceInDays.js");
/**
* The {@link differenceInWeeks} function options.
*/
/**
* @name differenceInWeeks
* @category Week Helpers
* @summary Get the number of full weeks between the given dates.
*
* @description
* Get the number of full weeks between two dates. Fractional weeks are
* truncated towards zero by default.
*
* One "full week" is the distance between a local time in one day to the same
* local time 7 days earlier or later. A full week can sometimes be less than
* or more than 7*24 hours if a daylight savings change happens between two dates.
*
* To ignore DST and only measure exact 7*24-hour periods, use this instead:
* `Math.trunc(differenceInHours(dateLeft, dateRight)/(7*24))|0`.
*
* @typeParam DateType - The `Date` type, the function operates on. Gets inferred from passed arguments. Allows to use extensions like [`UTCDate`](https://github.com/date-fns/utc).
*
* @param dateLeft - The later date
* @param dateRight - The earlier date
* @param options - An object with options
*
* @returns The number of full weeks
*
* @example
* // How many full weeks are between 5 July 2014 and 20 July 2014?
* const result = differenceInWeeks(new Date(2014, 6, 20), new Date(2014, 6, 5))
* //=> 2
*
* @example
* // How many full weeks are between
* // 1 March 2020 0:00 and 6 June 2020 0:00 ?
* // Note: because local time is used, the
* // result will always be 8 weeks (54 days),
* // even if DST starts and the period has
* // only 54*24-1 hours.
* const result = differenceInWeeks(
* new Date(2020, 5, 1),
* new Date(2020, 2, 6)
* )
* //=> 8
*/
function differenceInWeeks(dateLeft, dateRight, options) {
const diff = (0, _index2.differenceInDays)(dateLeft, dateRight) / 7;
return (0, _index.getRoundingMethod)(options?.roundingMethod)(diff);
}
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