34 lines
1023 B
JavaScript
34 lines
1023 B
JavaScript
import { toDate } from "./toDate.mjs";
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import { constructFrom } from "./constructFrom.mjs";
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/**
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* @name startOfYear
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* @category Year Helpers
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* @summary Return the start of a year for the given date.
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*
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* @description
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* Return the start of a year for the given date.
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* The result will be in the local timezone.
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*
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* @typeParam DateType - The `Date` type, the function operates on. Gets inferred from passed arguments. Allows to use extensions like [`UTCDate`](https://github.com/date-fns/utc).
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*
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* @param date - The original date
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*
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* @returns The start of a year
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*
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* @example
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* // The start of a year for 2 September 2014 11:55:00:
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* const result = startOfYear(new Date(2014, 8, 2, 11, 55, 00))
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* //=> Wed Jan 01 2014 00:00:00
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*/
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export function startOfYear(date) {
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const cleanDate = toDate(date);
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const _date = constructFrom(date, 0);
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_date.setFullYear(cleanDate.getFullYear(), 0, 1);
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_date.setHours(0, 0, 0, 0);
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return _date;
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}
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// Fallback for modularized imports:
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export default startOfYear;
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