47 lines
1.2 KiB
JavaScript
47 lines
1.2 KiB
JavaScript
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import { differenceInCalendarWeeks } from "./differenceInCalendarWeeks.js";
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import { lastDayOfMonth } from "./lastDayOfMonth.js";
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import { startOfMonth } from "./startOfMonth.js";
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import { toDate } from "./toDate.js";
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/**
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* The {@link getWeeksInMonth} function options.
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*/
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/**
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* @name getWeeksInMonth
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* @category Week Helpers
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* @summary Get the number of calendar weeks a month spans.
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*
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* @description
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* Get the number of calendar weeks the month in the given date spans.
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*
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* @param date - The given date
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* @param options - An object with options.
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*
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* @returns The number of calendar weeks
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*
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* @example
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* // How many calendar weeks does February 2015 span?
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* const result = getWeeksInMonth(new Date(2015, 1, 8))
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* //=> 4
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*
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* @example
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* // If the week starts on Monday,
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* // how many calendar weeks does July 2017 span?
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* const result = getWeeksInMonth(new Date(2017, 6, 5), { weekStartsOn: 1 })
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* //=> 6
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*/
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export function getWeeksInMonth(date, options) {
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const contextDate = toDate(date, options?.in);
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return (
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differenceInCalendarWeeks(
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lastDayOfMonth(contextDate, options),
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startOfMonth(contextDate, options),
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options,
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) + 1
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);
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}
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// Fallback for modularized imports:
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export default getWeeksInMonth;
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