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node_modules/date-fns/esm/differenceInCalendarMonths/index.js

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+import toDate from "../toDate/index.js";
+import requiredArgs from "../_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
+ */
+export default function differenceInCalendarMonths(dirtyDateLeft, dirtyDateRight) {
+  requiredArgs(2, arguments);
+  var dateLeft = toDate(dirtyDateLeft);
+  var dateRight = toDate(dirtyDateRight);
+  var yearDiff = dateLeft.getFullYear() - dateRight.getFullYear();
+  var monthDiff = dateLeft.getMonth() - dateRight.getMonth();
+  return yearDiff * 12 + monthDiff;
+}