index.js 1.0 KB

123456789101112131415161718192021222324252627282930313233
  1. "use strict";
  2. var _interopRequireDefault = require("@babel/runtime/helpers/interopRequireDefault").default;
  3. Object.defineProperty(exports, "__esModule", {
  4. value: true
  5. });
  6. exports.default = isLeapYear;
  7. var _index = _interopRequireDefault(require("../toDate/index.js"));
  8. var _index2 = _interopRequireDefault(require("../_lib/requiredArgs/index.js"));
  9. /**
  10. * @name isLeapYear
  11. * @category Year Helpers
  12. * @summary Is the given date in the leap year?
  13. *
  14. * @description
  15. * Is the given date in the leap year?
  16. *
  17. * @param {Date|Number} date - the date to check
  18. * @returns {Boolean} the date is in the leap year
  19. * @throws {TypeError} 1 argument required
  20. *
  21. * @example
  22. * // Is 1 September 2012 in the leap year?
  23. * const result = isLeapYear(new Date(2012, 8, 1))
  24. * //=> true
  25. */
  26. function isLeapYear(dirtyDate) {
  27. (0, _index2.default)(1, arguments);
  28. var date = (0, _index.default)(dirtyDate);
  29. var year = date.getFullYear();
  30. return year % 400 === 0 || year % 4 === 0 && year % 100 !== 0;
  31. }
  32. module.exports = exports.default;