35 lines
1.1 KiB
JavaScript
35 lines
1.1 KiB
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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/**
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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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* ### 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 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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* var 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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if (arguments.length < 1) {
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throw new TypeError('1 argument required, but only ' + arguments.length + ' present');
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}
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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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} |