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x/date_fns/getDaysInYear/index.ts

date-fns Deno package
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import toDate from '../toDate/index.ts'import isLeapYear from '../isLeapYear/index.ts'import requiredArgs from '../_lib/requiredArgs/index.ts'
/** * @name getDaysInYear * @category Year Helpers * @summary Get the number of days in a year of the given date. * * @description * Get the number of days in a year of the given date. * * ### 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 given date * @returns {Number} the number of days in a year * @throws {TypeError} 1 argument required * * @example * // How many days are in 2012? * const result = getDaysInYear(new Date(2012, 0, 1)) * //=> 366 */export default function getDaysInYear(dirtyDate: Date | number): number { requiredArgs(1, arguments)
const date = toDate(dirtyDate)
if (String(new Date(date)) === 'Invalid Date') { return NaN }
return isLeapYear(date) ? 366 : 365}