bc518174
 王天杨
提交两个项目文件
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import { toDate } from "./toDate.mjs";
import { constructFrom } from "./constructFrom.mjs";
/**
* @name getDaysInMonth
* @category Month Helpers
* @summary Get the number of days in a month of the given date.
*
* @description
* Get the number of days in a month of the given date.
*
* @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).
*
* @param date - The given date
*
* @returns The number of days in a month
*
* @example
* // How many days are in February 2000?
* const result = getDaysInMonth(new Date(2000, 1))
* //=> 29
*/
export function getDaysInMonth(date) {
const _date = toDate(date);
const year = _date.getFullYear();
const monthIndex = _date.getMonth();
const lastDayOfMonth = constructFrom(date, 0);
lastDayOfMonth.setFullYear(year, monthIndex + 1, 0);
lastDayOfMonth.setHours(0, 0, 0, 0);
return lastDayOfMonth.getDate();
}
// Fallback for modularized imports:
export default getDaysInMonth;
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