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- "use strict";
- var _interopRequireDefault = require("@babel/runtime/helpers/interopRequireDefault").default;
- Object.defineProperty(exports, "__esModule", {
- value: true
- });
- exports.default = getISOWeek;
- var _index = _interopRequireDefault(require("../toDate/index.js"));
- var _index2 = _interopRequireDefault(require("../startOfISOWeek/index.js"));
- var _index3 = _interopRequireDefault(require("../startOfISOWeekYear/index.js"));
- var _index4 = _interopRequireDefault(require("../_lib/requiredArgs/index.js"));
- var MILLISECONDS_IN_WEEK = 604800000;
- /**
- * @name getISOWeek
- * @category ISO Week Helpers
- * @summary Get the ISO week of the given date.
- *
- * @description
- * Get the ISO week of the given date.
- *
- * ISO week-numbering year: http://en.wikipedia.org/wiki/ISO_week_date
- *
- * @param {Date|Number} date - the given date
- * @returns {Number} the ISO week
- * @throws {TypeError} 1 argument required
- *
- * @example
- * // Which week of the ISO-week numbering year is 2 January 2005?
- * const result = getISOWeek(new Date(2005, 0, 2))
- * //=> 53
- */
- function getISOWeek(dirtyDate) {
- (0, _index4.default)(1, arguments);
- var date = (0, _index.default)(dirtyDate);
- var diff = (0, _index2.default)(date).getTime() - (0, _index3.default)(date).getTime();
- // Round the number of days to the nearest integer
- // because the number of milliseconds in a week is not constant
- // (e.g. it's different in the week of the daylight saving time clock shift)
- return Math.round(diff / MILLISECONDS_IN_WEEK) + 1;
- }
- module.exports = exports.default;
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