import DeveloperError from "./DeveloperError.js";
|
|
/**
|
* Determines if a given date is a leap year.
|
*
|
* @function isLeapYear
|
*
|
* @param {Number} year The year to be tested.
|
* @returns {Boolean} True if <code>year</code> is a leap year.
|
*
|
* @example
|
* var leapYear = Cesium.isLeapYear(2000); // true
|
*/
|
function isLeapYear(year) {
|
//>>includeStart('debug', pragmas.debug);
|
if (year === null || isNaN(year)) {
|
throw new DeveloperError("year is required and must be a number.");
|
}
|
//>>includeEnd('debug');
|
|
return (year % 4 === 0 && year % 100 !== 0) || year % 400 === 0;
|
}
|
export default isLeapYear;
|
