Marc Mintel
5397309103
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48 lines
1.5 KiB
Plaintext
48 lines
1.5 KiB
Plaintext
import { constructFrom } from "./constructFrom.js";
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import { getDaysInMonth } from "./getDaysInMonth.js";
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import { toDate } from "./toDate.js";
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/**
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* The {@link setMonth} function options.
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*/
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/**
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* @name setMonth
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* @category Month Helpers
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* @summary Set the month to the given date.
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*
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* @description
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* Set the month to the given date.
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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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* @typeParam ResultDate - The result `Date` type, it is the type returned from the context function if it is passed, or inferred from the arguments.
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*
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* @param date - The date to be changed
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* @param month - The month index to set (0-11)
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* @param options - The options
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*
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* @returns The new date with the month set
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*
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* @example
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* // Set February to 1 September 2014:
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* const result = setMonth(new Date(2014, 8, 1), 1)
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* //=> Sat Feb 01 2014 00:00:00
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*/
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export function setMonth(date, month, options) {
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const _date = toDate(date, options?.in);
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const year = _date.getFullYear();
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const day = _date.getDate();
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const midMonth = constructFrom(options?.in || date, 0);
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midMonth.setFullYear(year, month, 15);
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midMonth.setHours(0, 0, 0, 0);
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const daysInMonth = getDaysInMonth(midMonth);
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// Set the earlier date, allows to wrap Jan 31 to Feb 28
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_date.setMonth(month, Math.min(day, daysInMonth));
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return _date;
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}
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// Fallback for modularized imports:
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export default setMonth;
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