56 lines
1.9 KiB
JavaScript
56 lines
1.9 KiB
JavaScript
|
"use strict";
|
||
|
|
|
||
|
|
Object.defineProperty(exports, "__esModule", {
|
||
|
|
value: true
|
||
|
|
});
|
||
|
|
exports.default = addMonths;
|
||
|
|
|
||
|
|
var _index = _interopRequireDefault(require("../_lib/toInteger/index.js"));
|
||
|
|
|
||
|
|
var _index2 = _interopRequireDefault(require("../toDate/index.js"));
|
||
|
|
|
||
|
|
var _index3 = _interopRequireDefault(require("../getDaysInMonth/index.js"));
|
||
|
|
|
||
|
|
function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @name addMonths
|
||
|
|
* @category Month Helpers
|
||
|
|
* @summary Add the specified number of months to the given date.
|
||
|
|
*
|
||
|
|
* @description
|
||
|
|
* Add the specified number of months to 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 date to be changed
|
||
|
|
* @param {Number} amount - the amount of months to be added
|
||
|
|
* @returns {Date} the new date with the months added
|
||
|
|
* @throws {TypeError} 2 arguments required
|
||
|
|
*
|
||
|
|
* @example
|
||
|
|
* // Add 5 months to 1 September 2014:
|
||
|
|
* var result = addMonths(new Date(2014, 8, 1), 5)
|
||
|
|
* //=> Sun Feb 01 2015 00:00:00
|
||
|
|
*/
|
||
|
|
function addMonths(dirtyDate, dirtyAmount) {
|
||
|
|
if (arguments.length < 2) {
|
||
|
|
throw new TypeError('2 arguments required, but only ' + arguments.length + ' present');
|
||
|
|
}
|
||
|
|
|
||
|
|
var date = (0, _index2.default)(dirtyDate);
|
||
|
|
var amount = (0, _index.default)(dirtyAmount);
|
||
|
|
var desiredMonth = date.getMonth() + amount;
|
||
|
|
var dateWithDesiredMonth = new Date(0);
|
||
|
|
dateWithDesiredMonth.setFullYear(date.getFullYear(), desiredMonth, 1);
|
||
|
|
dateWithDesiredMonth.setHours(0, 0, 0, 0);
|
||
|
|
var daysInMonth = (0, _index3.default)(dateWithDesiredMonth); // Set the last day of the new month
|
||
|
|
// if the original date was the last day of the longer month
|
||
|
|
|
||
|
|
date.setMonth(desiredMonth, Math.min(daysInMonth, date.getDate()));
|
||
|
|
return date;
|
||
|
|
}
|
||
|
|
|
||
|
|
module.exports = exports.default;
|