getMonthWiseIntervalDatesFromADateRange

get-month-wise-interval-dates-from-a-date-range

const moment = require('moment');

function getMonthWiseIntervalDatesFromADateRange(startDateString, endDateString) {
  let startMoment = moment(startDateString);
  const endMoment = moment(endDateString);
  const monthDiff = endMoment.diff(startMoment, 'months');
  console.log(monthDiff);
  const pairsOfDates = [];
  if (monthDiff === 0) {
    const result = { startDate: startMoment, endDate: moment(endMoment) };
    result.startDate = result.startDate.toDate();
    result.endDate = result.endDate.toDate();
    pairsOfDates.push(result);
  } else {
    for (let i = 0; i <= monthDiff; i += 1) {
      const result = { startDate: startMoment, endDate: moment(startMoment).endOf('months') };
      startMoment = moment(result.endDate).add(1, 'milliseconds');
      result.startDate = result.startDate.toDate();
      result.endDate = result.endDate.toDate();
      pairsOfDates.push(result);
    }
    if (pairsOfDates.length) {
      pairsOfDates[pairsOfDates.length - 1].endDate = endMoment.toDate();
    }
  }
  return pairsOfDates;
}

const pairsOfDates = getMonthWiseIntervalDatesFromADateRange('2019-05-21T11:09:50.340', (new Date()).toISOString());
console.log('pairsOfDates - ', pairsOfDates);

// const pairsOfDates = getMonthWiseIntervalDatesFromADateRange('2020-01-22T18:30:00.000Z', '2020-02-25T18:29:59.999Z');
// console.log('pairsOfDates - ', pairsOfDates);
let date = new Date();
console.log(date.toString().replace(/\w+ (\w+) (\d+) (\d+).*/, '$2-$1-$3'));