54 lines
1.6 KiB
JavaScript
54 lines
1.6 KiB
JavaScript
|
import { toDate } from "./toDate.mjs";
|
||
|
|
import { getDefaultOptions } from "./_lib/defaultOptions.mjs";
|
||
|
|
|
||
|
|
/**
|
||
|
|
* The {@link startOfWeek} function options.
|
||
|
|
*/
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @name startOfWeek
|
||
|
|
* @category Week Helpers
|
||
|
|
* @summary Return the start of a week for the given date.
|
||
|
|
*
|
||
|
|
* @description
|
||
|
|
* Return the start of a week for the given date.
|
||
|
|
* The result will be in the local timezone.
|
||
|
|
*
|
||
|
|
* @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 original date
|
||
|
|
* @param options - An object with options
|
||
|
|
*
|
||
|
|
* @returns The start of a week
|
||
|
|
*
|
||
|
|
* @example
|
||
|
|
* // The start of a week for 2 September 2014 11:55:00:
|
||
|
|
* const result = startOfWeek(new Date(2014, 8, 2, 11, 55, 0))
|
||
|
|
* //=> Sun Aug 31 2014 00:00:00
|
||
|
|
*
|
||
|
|
* @example
|
||
|
|
* // If the week starts on Monday, the start of the week for 2 September 2014 11:55:00:
|
||
|
|
* const result = startOfWeek(new Date(2014, 8, 2, 11, 55, 0), { weekStartsOn: 1 })
|
||
|
|
* //=> Mon Sep 01 2014 00:00:00
|
||
|
|
*/
|
||
|
|
export function startOfWeek(date, options) {
|
||
|
|
const defaultOptions = getDefaultOptions();
|
||
|
|
const weekStartsOn =
|
||
|
|
options?.weekStartsOn ??
|
||
|
|
options?.locale?.options?.weekStartsOn ??
|
||
|
|
defaultOptions.weekStartsOn ??
|
||
|
|
defaultOptions.locale?.options?.weekStartsOn ??
|
||
|
|
0;
|
||
|
|
|
||
|
|
const _date = toDate(date);
|
||
|
|
const day = _date.getDay();
|
||
|
|
const diff = (day < weekStartsOn ? 7 : 0) + day - weekStartsOn;
|
||
|
|
|
||
|
|
_date.setDate(_date.getDate() - diff);
|
||
|
|
_date.setHours(0, 0, 0, 0);
|
||
|
|
return _date;
|
||
|
|
}
|
||
|
|
|
||
|
|
// Fallback for modularized imports:
|
||
|
|
export default startOfWeek;
|