@technobuddha/library
Version:
A large library of useful functions
15 lines • 1.17 kB
JavaScript
/**
* Determine if a year is a leap year
* @param input - A date, or a year number
* @param options - see {@link LeapYearOptions}
* @returns true, if the specified year is a leap year
* @group Time
* @category Year
*/
export function isLeapYear(input, { utc = false } = {}) {
const year = typeof input === 'number' ? input
: utc ? input.getUTCFullYear()
: input.getFullYear();
return year % 4 === 0 && (year % 100 !== 0 || year % 400 === 0);
}
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