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

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+"use strict";
+
+var _interopRequireDefault = require("@babel/runtime/helpers/interopRequireDefault").default;
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.default = startOfDecade;
+var _index = _interopRequireDefault(require("../toDate/index.js"));
+var _index2 = _interopRequireDefault(require("../_lib/requiredArgs/index.js"));
+/**
+ * @name startOfDecade
+ * @category Decade Helpers
+ * @summary Return the start of a decade for the given date.
+ *
+ * @description
+ * Return the start of a decade for the given date.
+ *
+ * @param {Date|Number} date - the original date
+ * @returns {Date} the start of a decade
+ * @throws {TypeError} 1 argument required
+ *
+ * @example
+ * // The start of a decade for 21 October 2015 00:00:00:
+ * const result = startOfDecade(new Date(2015, 9, 21, 00, 00, 00))
+ * //=> Jan 01 2010 00:00:00
+ */
+function startOfDecade(dirtyDate) {
+  (0, _index2.default)(1, arguments);
+  var date = (0, _index.default)(dirtyDate);
+  var year = date.getFullYear();
+  var decade = Math.floor(year / 10) * 10;
+  date.setFullYear(decade, 0, 1);
+  date.setHours(0, 0, 0, 0);
+  return date;
+}
+module.exports = exports.default;