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35 lines
972 B
35 lines
972 B
import toDate from '../toDate/index.js';
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import isLeapYear from '../isLeapYear/index.js';
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import requiredArgs from '../_lib/requiredArgs/index.js';
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/**
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* @name getDaysInYear
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* @category Year Helpers
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* @summary Get the number of days in a year of the given date.
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*
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* @description
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* Get the number of days in a year of the given date.
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*
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* ### v2.0.0 breaking changes:
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*
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* - [Changes that are common for the whole library](https://github.com/date-fns/date-fns/blob/master/docs/upgradeGuide.md#Common-Changes).
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*
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* @param {Date|Number} date - the given date
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* @returns {Number} the number of days in a year
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* @throws {TypeError} 1 argument required
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*
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* @example
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* // How many days are in 2012?
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* var result = getDaysInYear(new Date(2012, 0, 1))
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* //=> 366
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*/
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export default function getDaysInYear(dirtyDate) {
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requiredArgs(1, arguments);
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var date = toDate(dirtyDate);
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if (isNaN(date)) {
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return NaN;
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}
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return isLeapYear(date) ? 366 : 365;
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} |