29 lines
881 B
JavaScript
29 lines
881 B
JavaScript
import toDate from "../toDate/index.js";
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import startOfYear from "../startOfYear/index.js";
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import differenceInCalendarDays from "../differenceInCalendarDays/index.js";
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import requiredArgs from "../_lib/requiredArgs/index.js";
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/**
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* @name getDayOfYear
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* @category Day Helpers
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* @summary Get the day of the year of the given date.
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*
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* @description
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* Get the day of the 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 day of year
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* @throws {TypeError} 1 argument required
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*
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* @example
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* // Which day of the year is 2 July 2014?
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* const result = getDayOfYear(new Date(2014, 6, 2))
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* //=> 183
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*/
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export default function getDayOfYear(dirtyDate) {
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requiredArgs(1, arguments);
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var date = toDate(dirtyDate);
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var diff = differenceInCalendarDays(date, startOfYear(date));
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var dayOfYear = diff + 1;
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return dayOfYear;
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} |