react-day-picker/dist/esm/hebrew/lib/findMonthIndexByCode.js

Customizable Date Picker for React

import { getMonthCode, monthsInHebrewYear } from "../utils/calendarMath.js";
export function findMonthIndexByCode(year, preferredCode) {
    const monthsCount = monthsInHebrewYear(year);
    for (let index = 0; index < monthsCount; index += 1) {
        if (getMonthCode(year, index) === preferredCode) {
            return index;
        }
    }
    return -1;
}