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backend/node_modules/date-fns/subISOWeekYears/index.js

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+"use strict";
+
+var _interopRequireDefault = require("@babel/runtime/helpers/interopRequireDefault").default;
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.default = subISOWeekYears;
+var _index = _interopRequireDefault(require("../addISOWeekYears/index.js"));
+var _index2 = _interopRequireDefault(require("../_lib/requiredArgs/index.js"));
+var _index3 = _interopRequireDefault(require("../_lib/toInteger/index.js"));
+/**
+ * @name subISOWeekYears
+ * @category ISO Week-Numbering Year Helpers
+ * @summary Subtract the specified number of ISO week-numbering years from the given date.
+ *
+ * @description
+ * Subtract the specified number of ISO week-numbering years from the given date.
+ *
+ * ISO week-numbering year: http://en.wikipedia.org/wiki/ISO_week_date
+ *
+ * @param {Date|Number} date - the date to be changed
+ * @param {Number} amount - the amount of ISO week-numbering years to be subtracted. Positive decimals will be rounded using `Math.floor`, decimals less than zero will be rounded using `Math.ceil`.
+ * @returns {Date} the new date with the ISO week-numbering years subtracted
+ * @throws {TypeError} 2 arguments required
+ *
+ * @example
+ * // Subtract 5 ISO week-numbering years from 1 September 2014:
+ * const result = subISOWeekYears(new Date(2014, 8, 1), 5)
+ * //=> Mon Aug 31 2009 00:00:00
+ */
+function subISOWeekYears(dirtyDate, dirtyAmount) {
+  (0, _index2.default)(2, arguments);
+  var amount = (0, _index3.default)(dirtyAmount);
+  return (0, _index.default)(dirtyDate, -amount);
+}
+module.exports = exports.default;