edate.js

import parsedate from "./parsedate";
import serial from "./serial";

export default function edate(start_date, months) {
  start_date = parsedate(start_date);

  if (start_date instanceof Error) {
    return start_date;
  }
  if (isNaN(months)) {
    return error.value;
  }
  months = parseInt(months, 10);
  start_date.setMonth(start_date.getMonth() + months);
  return serial(start_date);
}