31 lines
826 B
JavaScript
31 lines
826 B
JavaScript
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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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* @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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* const 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 (String(new Date(date)) === 'Invalid Date') {
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return NaN;
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}
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return isLeapYear(date) ? 366 : 365;
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}
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