Initial commit: Crypto trader application

frontend/node_modules/date-fns/isLeapYear.js

@@ -0,0 +1,28 @@
+"use strict";
+exports.isLeapYear = isLeapYear;
+var _index = require("./toDate.js");
+
+/**
+ * @name isLeapYear
+ * @category Year Helpers
+ * @summary Is the given date in the leap year?
+ *
+ * @description
+ * Is the given date in the leap year?
+ *
+ * @typeParam DateType - The `Date` type, the function operates on. Gets inferred from passed arguments. Allows to use extensions like [`UTCDate`](https://github.com/date-fns/utc).
+ *
+ * @param date - The date to check
+ *
+ * @returns The date is in the leap year
+ *
+ * @example
+ * // Is 1 September 2012 in the leap year?
+ * const result = isLeapYear(new Date(2012, 8, 1))
+ * //=> true
+ */
+function isLeapYear(date) {
+  const _date = (0, _index.toDate)(date);
+  const year = _date.getFullYear();
+  return year % 400 === 0 || (year % 4 === 0 && year % 100 !== 0);
+}