Get next n-weekdays using date-fns

date-fns-next-n-weekdays.js

import { addDays, isWeekend } from "date-fns";

function nextNWeekdays(date, count) {
  return nextNWeekdaysHelper(date, count, []);
}

function nextNWeekdaysHelper(date, count, nextWeekdaysSoFar) {
  if (count === nextWeekdaysSoFar.length) {
    return nextWeekdaysSoFar;
  }

  const nextDay = addDays(date, 1);

  if (isWeekend(nextDay)) {
    return nextNWeekdaysHelper(nextDay, count, nextWeekdaysSoFar);
  }

  return nextNWeekdaysHelper(nextDay, count, [...nextWeekdaysSoFar, nextDay]);
}