eomonth.js

import parsedate from "./parsedate";
import { ERRORTYPES as error } from "./error";

export default function eomonth(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);
  return new Date(
    start_date.getFullYear(),
    start_date.getMonth() + months + 1,
    0
  );
}