33 lines
1.1 KiB
JavaScript
33 lines
1.1 KiB
JavaScript
import toInteger from "../_lib/toInteger/index.js";
|
|
import toDate from "../toDate/index.js";
|
|
import getISOWeek from "../getISOWeek/index.js";
|
|
import requiredArgs from "../_lib/requiredArgs/index.js";
|
|
/**
|
|
* @name setISOWeek
|
|
* @category ISO Week Helpers
|
|
* @summary Set the ISO week to the given date.
|
|
*
|
|
* @description
|
|
* Set the ISO week to the given date, saving the weekday number.
|
|
*
|
|
* ISO week-numbering year: http://en.wikipedia.org/wiki/ISO_week_date
|
|
*
|
|
* @param {Date|Number} date - the date to be changed
|
|
* @param {Number} isoWeek - the ISO week of the new date
|
|
* @returns {Date} the new date with the ISO week set
|
|
* @throws {TypeError} 2 arguments required
|
|
*
|
|
* @example
|
|
* // Set the 53rd ISO week to 7 August 2004:
|
|
* const result = setISOWeek(new Date(2004, 7, 7), 53)
|
|
* //=> Sat Jan 01 2005 00:00:00
|
|
*/
|
|
|
|
export default function setISOWeek(dirtyDate, dirtyISOWeek) {
|
|
requiredArgs(2, arguments);
|
|
var date = toDate(dirtyDate);
|
|
var isoWeek = toInteger(dirtyISOWeek);
|
|
var diff = getISOWeek(date) - isoWeek;
|
|
date.setDate(date.getDate() - diff * 7);
|
|
return date;
|
|
} |