📝 Commit Details:

backend/node_modules/date-fns/differenceInMonths.cjs

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+"use strict";
+exports.differenceInMonths = differenceInMonths;
+var _index = require("./_lib/normalizeDates.cjs");
+var _index2 = require("./compareAsc.cjs");
+var _index3 = require("./differenceInCalendarMonths.cjs");
+var _index4 = require("./isLastDayOfMonth.cjs");
+
+/**
+ * The {@link differenceInMonths} function options.
+ */
+
+/**
+ * @name differenceInMonths
+ * @category Month Helpers
+ * @summary Get the number of full months between the given dates.
+ *
+ * @param laterDate - The later date
+ * @param earlierDate - The earlier date
+ * @param options - An object with options
+ *
+ * @returns The number of full months
+ *
+ * @example
+ * // How many full months are between 31 January 2014 and 1 September 2014?
+ * const result = differenceInMonths(new Date(2014, 8, 1), new Date(2014, 0, 31))
+ * //=> 7
+ */
+function differenceInMonths(laterDate, earlierDate, options) {
+  const [laterDate_, workingLaterDate, earlierDate_] = (0,
+  _index.normalizeDates)(options?.in, laterDate, laterDate, earlierDate);
+
+  const sign = (0, _index2.compareAsc)(workingLaterDate, earlierDate_);
+  const difference = Math.abs(
+    (0, _index3.differenceInCalendarMonths)(workingLaterDate, earlierDate_),
+  );
+
+  if (difference < 1) return 0;
+
+  if (workingLaterDate.getMonth() === 1 && workingLaterDate.getDate() > 27)
+    workingLaterDate.setDate(30);
+
+  workingLaterDate.setMonth(workingLaterDate.getMonth() - sign * difference);
+
+  let isLastMonthNotFull =
+    (0, _index2.compareAsc)(workingLaterDate, earlierDate_) === -sign;
+
+  if (
+    (0, _index4.isLastDayOfMonth)(laterDate_) &&
+    difference === 1 &&
+    (0, _index2.compareAsc)(laterDate_, earlierDate_) === 1
+  ) {
+    isLastMonthNotFull = false;
+  }
+
+  const result = sign * (difference - +isLastMonthNotFull);
+  return result === 0 ? 0 : result;
+}