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| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 | 3305x 3x 3302x | 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
* const 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;
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