timepiece/node_modules/date-fns/setWeekYear.d.ts

56 lines
1.9 KiB
TypeScript

import type {
FirstWeekContainsDateOptions,
LocalizedOptions,
WeekOptions,
} from "./types.js";
/**
* The {@link setWeekYear} function options.
*/
export interface SetWeekYearOptions
extends LocalizedOptions<"options">,
WeekOptions,
FirstWeekContainsDateOptions {}
/**
* @name setWeekYear
* @category Week-Numbering Year Helpers
* @summary Set the local week-numbering year to the given date.
*
* @description
* Set the local week-numbering year to the given date,
* saving the week number and the weekday number.
* The exact calculation depends on the values of
* `options.weekStartsOn` (which is the index of the first day of the week)
* and `options.firstWeekContainsDate` (which is the day of January, which is always in
* the first week of the week-numbering year)
*
* Week numbering: https://en.wikipedia.org/wiki/Week#The_ISO_week_date_system
*
* @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 date to be changed
* @param weekYear - The local week-numbering year of the new date
* @param options - An object with options
*
* @returns The new date with the local week-numbering year set
*
* @example
* // Set the local week-numbering year 2004 to 2 January 2010 with default options:
* const result = setWeekYear(new Date(2010, 0, 2), 2004)
* //=> Sat Jan 03 2004 00:00:00
*
* @example
* // Set the local week-numbering year 2004 to 2 January 2010,
* // if Monday is the first day of week
* // and 4 January is always in the first week of the year:
* const result = setWeekYear(new Date(2010, 0, 2), 2004, {
* weekStartsOn: 1,
* firstWeekContainsDate: 4
* })
* //=> Sat Jan 01 2005 00:00:00
*/
export declare function setWeekYear<DateType extends Date>(
date: DateType | number | string,
weekYear: number,
options?: SetWeekYearOptions,
): DateType;