function compareAsc(dirtyDateLeft, dirtyDateRight) {
  __WEBPACK_IMPORTED_MODULE_1__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 diff = dateLeft.getTime() - dateRight.getTime();

  if (diff < 0) {
    return -1;
  } else if (diff > 0) {
    return 1; // Return 0 if diff is 0; return NaN if diff is NaN
  } else {
    return diff;
  }
}
@name compareAsc
@category Common Helpers
@summary Compare the two dates and return -1, 0 or 1.

@description
Compare the two dates and return 1 if the first date is after the second,
-1 if the first date is before the second or 0 if dates are equal.

### 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 first date to compare
@param {Date|Number} dateRight - the second date to compare
@returns {Number} the result of the comparison
@throws {TypeError} 2 arguments required

@example
// Compare 11 February 1987 and 10 July 1989:
var result = compareAsc(new Date(1987, 1, 11), new Date(1989, 6, 10))
//=> -1

@example
// Sort the array of dates:
var result = [
  new Date(1995, 6, 2),
  new Date(1987, 1, 11),
  new Date(1989, 6, 10)
].sort(compareAsc)
//=> [
//   Wed Feb 11 1987 00:00:00,
//   Mon Jul 10 1989 00:00:00,
//   Sun Jul 02 1995 00:00:00
// ]