react-day-picker/dist/esm/hijri/utils/daysInMonth.js

Customizable Date Picker for React

import { toGregorianDate, toHijriDate } from "./conversion.js";
import { clampHijriDate } from "./range.js";
const MAX_DAY_IN_HIJRI_MONTH = 30;
const MIN_DAY_IN_HIJRI_MONTH = 29;
export function getDaysInMonth(year, monthIndex) {
    const clamped = clampHijriDate({ year, monthIndex, day: 1 });
    for (let day = MAX_DAY_IN_HIJRI_MONTH; day >= MIN_DAY_IN_HIJRI_MONTH; day -= 1) {
        const candidateDate = toGregorianDate({
            year: clamped.year,
            monthIndex: clamped.monthIndex,
            day,
        });
        const roundTrip = toHijriDate(candidateDate);
        if (roundTrip.year === clamped.year &&
            roundTrip.monthIndex === clamped.monthIndex &&
            roundTrip.day === day) {
            return day;
        }
    }
    return MIN_DAY_IN_HIJRI_MONTH;
}