init

mc_test/node_modules/date-fns/esm/getDecade/index.js

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+import toDate from "../toDate/index.js";
+import requiredArgs from "../_lib/requiredArgs/index.js";
+/**
+ * @name getDecade
+ * @category Decade Helpers
+ * @summary Get the decade of the given date.
+ *
+ * @description
+ * Get the decade of the given date.
+ *
+ * @param {Date|Number} date - the given date
+ * @returns {Number} the year of decade
+ * @throws {TypeError} 1 argument required
+ *
+ * @example
+ * // Which decade belongs 27 November 1942?
+ * const result = getDecade(new Date(1942, 10, 27))
+ * //=> 1940
+ */
+export default function getDecade(dirtyDate) {
+  requiredArgs(1, arguments);
+  var date = toDate(dirtyDate);
+  var year = date.getFullYear();
+  var decade = Math.floor(year / 10) * 10;
+  return decade;
+}