Current File : /var/www/html/node_modules/date-fns/getISOWeek/index.js
"use strict";
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"));
function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
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
*
* ### 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
* @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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