react-day-picker/dist/esm/hijri/lib/setMonth.js

Customizable Date Picker for React

import { toGregorianDate, toHijriDate } from "../utils/conversion.js";
import { getDaysInMonth } from "../utils/daysInMonth.js";
export function setMonth(date, monthIndex) {
    const hijri = toHijriDate(date);
    // Handle overflow/underflow of monthIndex
    // Note: monthIndex argument is absolute month index for the year.
    // E.g. setMonth(..., 13) sets to Safar next year.
    let targetYear = hijri.year;
    let targetMonth = monthIndex;
    if (targetMonth > 11 || targetMonth < 0) {
        targetYear += Math.floor(targetMonth / 12);
        targetMonth = targetMonth % 12;
        if (targetMonth < 0) {
            targetMonth += 12;
        }
    }
    const daysInTargetMonth = getDaysInMonth(targetYear, targetMonth);
    const day = Math.min(hijri.day, daysInTargetMonth);
    return toGregorianDate({
        year: targetYear,
        monthIndex: targetMonth,
        day,
    });
}