You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
30 lines
914 B
30 lines
914 B
import toDate from '../toDate/index.js';
|
|
import requiredArgs from '../_lib/requiredArgs/index.js';
|
|
/**
|
|
* @name isLeapYear
|
|
* @category Year Helpers
|
|
* @summary Is the given date in the leap year?
|
|
*
|
|
* @description
|
|
* Is the given date in the leap year?
|
|
*
|
|
* ### v2.0.0 breaking changes:
|
|
*
|
|
* - [Changes that are common for the whole library](https://github.com/date-fns/date-fns/blob/master/docs/upgradeGuide.md#Common-Changes).
|
|
*
|
|
* @param {Date|Number} date - the date to check
|
|
* @returns {Boolean} the date is in the leap year
|
|
* @throws {TypeError} 1 argument required
|
|
*
|
|
* @example
|
|
* // Is 1 September 2012 in the leap year?
|
|
* var result = isLeapYear(new Date(2012, 8, 1))
|
|
* //=> true
|
|
*/
|
|
|
|
export default function isLeapYear(dirtyDate) {
|
|
requiredArgs(1, arguments);
|
|
var date = toDate(dirtyDate);
|
|
var year = date.getFullYear();
|
|
return year % 400 === 0 || year % 4 === 0 && year % 100 !== 0;
|
|
} |