How to use the jalaali-js.toJalaali function in jalaali-js

function getJalaaliDatetime(gregorianMoment, jalaliMonths) {
  var jalaliDate = jalali.toJalaali(
    gregorianMoment.year(),
    gregorianMoment.month() + 1,
    gregorianMoment.date()
  );
  var output =
    // eslint-disable-next-line prefer-template
    jalaliDate.jd + ' ' + jalaliMonths[jalaliDate.jm - 1] + ' ' + jalaliDate.jy;
  return output;
}

formatDate: gregorianMoment => {
    if (isSupportedMoment(gregorianMoment)) {
      const jalaaliDate = jalaaliJs.toJalaali(
        gregorianMoment.year(),
        gregorianMoment.month() + 1,
        gregorianMoment.date(),
      );
      const localeJalaaliMonths = jalaaliMonths[gregorianMoment.locale()];
      const jalaaliMonth = localeJalaaliMonths[jalaaliDate.jm - 1];
      const output = `${jalaaliDate.jd} ${jalaaliMonth} ${jalaaliDate.jy}`;
      return output;
    }
    return null;
  },
};

function toJalaali(gy, gm, gd) {
  var j = jalaali.toJalaali(gy, gm + 1, gd)
  j.jm -= 1
  return j
}

const getToday = () => {
    const todayDate = new Date();
    const year = todayDate.getFullYear();
    const month = todayDate.getMonth() + 1;
    const day = todayDate.getDate();
    if (isGregorian) return { year, month, day };
    const { jy, jm, jd } = jalaali.toJalaali(year, month, day);
    const currentDate = { year: jy, month: jm, day: jd };
    return currentDate;
  };