Current File : /var/www/html/node_modules/date-fns/esm/getWeekOfMonth/index.js
import getDate from "../getDate/index.js";
import getDay from "../getDay/index.js";
import startOfMonth from "../startOfMonth/index.js";
import requiredArgs from "../_lib/requiredArgs/index.js";
import toInteger from "../_lib/toInteger/index.js";
/**
* @name getWeekOfMonth
* @category Week Helpers
* @summary Get the week of the month of the given date.
*
* @description
* Get the week of the month of the given date.
*
* ### v2.0.0 breaking changes:
*
* - [Changes that are common for the whole library](https://github.com/date-fns/date-fns/blob/master/docs/upgradeGuide.md#Common-Changes).
*
* @param {Date|Number} date - the given date
* @param {Object} [options] - an object with options.
* @param {Locale} [options.locale=defaultLocale] - the locale object. See [Locale]{@link https://date-fns.org/docs/Locale}
* @param {0|1|2|3|4|5|6} [options.weekStartsOn=0] - the index of the first day of the week (0 - Sunday)
* @returns {Number} the week of month
* @throws {TypeError} 1 argument required
* @throws {RangeError} `options.weekStartsOn` must be between 0 and 6 inclusively
*
* @example
* // Which week of the month is 9 November 2017?
* const result = getWeekOfMonth(new Date(2017, 10, 9))
* //=> 2
*/
export default function getWeekOfMonth(date, options) {
var _options$locale, _options$locale$optio;
requiredArgs(1, arguments);
var defaultWeekStartsOn = (options === null || options === void 0 ? void 0 : (_options$locale = options.locale) === null || _options$locale === void 0 ? void 0 : (_options$locale$optio = _options$locale.options) === null || _options$locale$optio === void 0 ? void 0 : _options$locale$optio.weekStartsOn) || 0;
var weekStartsOn = (options === null || options === void 0 ? void 0 : options.weekStartsOn) == null ? toInteger(defaultWeekStartsOn) : toInteger(options.weekStartsOn);
if (!(weekStartsOn >= 0 && weekStartsOn <= 6)) {
throw new RangeError('weekStartsOn must be between 0 and 6 inclusively');
}
var currentDayOfMonth = getDate(date);
if (isNaN(currentDayOfMonth)) return NaN;
var startWeekDay = getDay(startOfMonth(date));
var lastDayOfFirstWeek = weekStartsOn - startWeekDay;
if (lastDayOfFirstWeek <= 0) lastDayOfFirstWeek += 7;
var remainingDaysAfterFirstWeek = currentDayOfMonth - lastDayOfFirstWeek;
return Math.ceil(remainingDaysAfterFirstWeek / 7) + 1;
}
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