node_modules/date-fns/differenceInCalendarMonths/index.js


1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39

"use strict";

var _interopRequireDefault = require("@babel/runtime/helpers/interopRequireDefault").default;
Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = differenceInCalendarMonths;
var _index = _interopRequireDefault(require("../toDate/index.js"));
var _index2 = _interopRequireDefault(require("../_lib/requiredArgs/index.js"));
/**
 * @name differenceInCalendarMonths
 * @category Month Helpers
 * @summary Get the number of calendar months between the given dates.
 *
 * @description
 * Get the number of calendar months between the given dates.
 *
 * @param {Date|Number} dateLeft - the later date
 * @param {Date|Number} dateRight - the earlier date
 * @returns {Number} the number of calendar months
 * @throws {TypeError} 2 arguments required
 *
 * @example
 * // How many calendar months are between 31 January 2014 and 1 September 2014?
 * const result = differenceInCalendarMonths(
 *   new Date(2014, 8, 1),
 *   new Date(2014, 0, 31)
 * )
 * //=> 8
 */
function differenceInCalendarMonths(dirtyDateLeft, dirtyDateRight) {
  (0, _index2.default)(2, arguments);
  var dateLeft = (0, _index.default)(dirtyDateLeft);
  var dateRight = (0, _index.default)(dirtyDateRight);
  var yearDiff = dateLeft.getFullYear() - dateRight.getFullYear();
  var monthDiff = dateLeft.getMonth() - dateRight.getMonth();
  return yearDiff * 12 + monthDiff;
}
module.exports = exports.default;