function differenceInMonths(dirtyDateLeft, dirtyDateRight) {
  __WEBPACK_IMPORTED_MODULE_3__lib_requiredArgs_index_js__["a" /* default */](2, arguments);
  var dateLeft = __WEBPACK_IMPORTED_MODULE_0__toDate_index_js__["a" /* default */](dirtyDateLeft);
  var dateRight = __WEBPACK_IMPORTED_MODULE_0__toDate_index_js__["a" /* default */](dirtyDateRight);
  var sign = __WEBPACK_IMPORTED_MODULE_2__compareAsc_index_js__["a" /* default */](dateLeft, dateRight);
  var difference = Math.abs(__WEBPACK_IMPORTED_MODULE_1__differenceInCalendarMonths_index_js__["a" /* default */](dateLeft, dateRight));
  dateLeft.setMonth(dateLeft.getMonth() - sign * difference); // Math.abs(diff in full months - diff in calendar months) === 1 if last calendar month is not full
  // If so, result must be decreased by 1 in absolute value

  var isLastMonthNotFull = __WEBPACK_IMPORTED_MODULE_2__compareAsc_index_js__["a" /* default */](dateLeft, dateRight) === -sign;
  var result = sign * (difference - isLastMonthNotFull); // Prevent negative zero

  return result === 0 ? 0 : result;
}
@name differenceInMonths
@category Month Helpers
@summary Get the number of full months between the given dates.

@description
Get the number of full months between the given dates.

### 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} dateLeft - the later date
@param {Date|Number} dateRight - the earlier date
@returns {Number} the number of full months
@throws {TypeError} 2 arguments required

@example
// How many full months are between 31 January 2014 and 1 September 2014?
var result = differenceInMonths(new Date(2014, 8, 1), new Date(2014, 0, 31))
//=> 7