Get range of dates

dateRange.js

const moment = require('moment');

function getRangeOfDates(start, end, key, arr = [start.startOf(key)]) {
  
  if(start.isAfter(end)) throw new Error('start must precede end')
  
  const next = moment(start).add(1, key).startOf(key);
  
  
  if(next.isAfter(end, key)) return arr;
  

  return getRangeOfDates(next, end, key, arr.concat(next));
  
}

Tnks !