Marc Mintel
5397309103
Some checks failed
Build & Deploy / 🔍 Prepare (push) Successful in 20s
Build & Deploy / 🧪 QA (push) Failing after 34s
Build & Deploy / 🏗️ Build (push) Has started running
Build & Deploy / 🚀 Deploy (push) Has been cancelled
Build & Deploy / 🧪 Smoke Test (push) Has been cancelled
Build & Deploy / ⚡ Lighthouse (push) Has been cancelled
Build & Deploy / 🔔 Notify (push) Has been cancelled
40 lines
1.3 KiB
Plaintext
40 lines
1.3 KiB
Plaintext
"use strict";
|
|
exports.getISOWeek = getISOWeek;
|
|
var _index = require("./constants.js");
|
|
var _index2 = require("./startOfISOWeek.js");
|
|
var _index3 = require("./startOfISOWeekYear.js");
|
|
var _index4 = require("./toDate.js");
|
|
|
|
/**
|
|
* @name getISOWeek
|
|
* @category ISO Week Helpers
|
|
* @summary Get the ISO week of the given date.
|
|
*
|
|
* @description
|
|
* Get the ISO week of the given date.
|
|
*
|
|
* ISO week-numbering year: http://en.wikipedia.org/wiki/ISO_week_date
|
|
*
|
|
* @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 date - The given date
|
|
*
|
|
* @returns The ISO week
|
|
*
|
|
* @example
|
|
* // Which week of the ISO-week numbering year is 2 January 2005?
|
|
* const result = getISOWeek(new Date(2005, 0, 2))
|
|
* //=> 53
|
|
*/
|
|
function getISOWeek(date) {
|
|
const _date = (0, _index4.toDate)(date);
|
|
const diff =
|
|
+(0, _index2.startOfISOWeek)(_date) -
|
|
+(0, _index3.startOfISOWeekYear)(_date);
|
|
|
|
// Round the number of weeks 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(diff / _index.millisecondsInWeek) + 1;
|
|
}
|