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65 lines
2.7 KiB
65 lines
2.7 KiB
"use strict";
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Object.defineProperty(exports, "__esModule", {
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value: true
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});
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exports.default = getWeekOfMonth;
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var _index = _interopRequireDefault(require("../getDate/index.js"));
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var _index2 = _interopRequireDefault(require("../getDay/index.js"));
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var _index3 = _interopRequireDefault(require("../startOfMonth/index.js"));
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var _index4 = _interopRequireDefault(require("../_lib/requiredArgs/index.js"));
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var _index5 = _interopRequireDefault(require("../_lib/toInteger/index.js"));
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function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
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/**
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* @name getWeekOfMonth
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* @category Week Helpers
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* @summary Get the week of the month of the given date.
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*
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* @description
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* Get the week of the month of the given date.
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*
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* ### v2.0.0 breaking changes:
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*
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* - [Changes that are common for the whole library](https://github.com/date-fns/date-fns/blob/master/docs/upgradeGuide.md#Common-Changes).
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*
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* @param {Date|Number} date - the given date
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* @param {Object} [options] - an object with options.
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* @param {Locale} [options.locale=defaultLocale] - the locale object. See [Locale]{@link https://date-fns.org/docs/Locale}
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* @param {0|1|2|3|4|5|6} [options.weekStartsOn=0] - the index of the first day of the week (0 - Sunday)
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* @returns {Number} the week of month
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* @throws {TypeError} 1 argument required
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* @throws {RangeError} `options.weekStartsOn` must be between 0 and 6 inclusively
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*
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* @example
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* // Which week of the month is 9 November 2017?
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* const result = getWeekOfMonth(new Date(2017, 10, 9))
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* //=> 2
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*/
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function getWeekOfMonth(date, options) {
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var _options$locale, _options$locale$optio;
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(0, _index4.default)(1, arguments);
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var defaultWeekStartsOn = (options === null || options === void 0 ? void 0 : (_options$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;
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var weekStartsOn = (options === null || options === void 0 ? void 0 : options.weekStartsOn) == null ? (0, _index5.default)(defaultWeekStartsOn) : (0, _index5.default)(options.weekStartsOn);
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if (!(weekStartsOn >= 0 && weekStartsOn <= 6)) {
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throw new RangeError('weekStartsOn must be between 0 and 6 inclusively');
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}
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var currentDayOfMonth = (0, _index.default)(date);
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if (isNaN(currentDayOfMonth)) return NaN;
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var startWeekDay = (0, _index2.default)((0, _index3.default)(date));
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var lastDayOfFirstWeek = weekStartsOn - startWeekDay;
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if (lastDayOfFirstWeek <= 0) lastDayOfFirstWeek += 7;
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var remainingDaysAfterFirstWeek = currentDayOfMonth - lastDayOfFirstWeek;
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return Math.ceil(remainingDaysAfterFirstWeek / 7) + 1;
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}
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module.exports = exports.default; |