26 lines
738 B
JavaScript
26 lines
738 B
JavaScript
|
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?
|
||
|
|
*
|
||
|
|
* @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?
|
||
|
|
* const 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;
|
||
|
|
}
|