39 lines
1.2 KiB
JavaScript
39 lines
1.2 KiB
JavaScript
import { getQuarter } from "./getQuarter.mjs";
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import { toDate } from "./toDate.mjs";
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/**
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* @name differenceInCalendarQuarters
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* @category Quarter Helpers
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* @summary Get the number of calendar quarters between the given dates.
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*
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* @description
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* Get the number of calendar quarters between the given dates.
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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 dateLeft - The later date
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* @param dateRight - The earlier date
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* @returns The number of calendar quarters
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*
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* @example
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* // How many calendar quarters are between 31 December 2013 and 2 July 2014?
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* const result = differenceInCalendarQuarters(
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* new Date(2014, 6, 2),
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* new Date(2013, 11, 31)
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* )
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* //=> 3
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*/
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export function differenceInCalendarQuarters(dateLeft, dateRight) {
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const _dateLeft = toDate(dateLeft);
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const _dateRight = toDate(dateRight);
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const yearDiff = _dateLeft.getFullYear() - _dateRight.getFullYear();
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const quarterDiff = getQuarter(_dateLeft) - getQuarter(_dateRight);
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return yearDiff * 4 + quarterDiff;
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}
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// Fallback for modularized imports:
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export default differenceInCalendarQuarters;
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