Compare date ranges in ISO format

Question

Link to codeSandox

I have two date ranges, one from API and another from user input. Both are in ISO format.

date range from API:

dateStart 2019-04-01T03:04:00Z
dateStop 2019-04-01T03:05:00Z

date range from user input:

convertedDateFrom 2020-09-15T18:30:00.000Z
convertedDateTo 2020-09-21T18:30:00.000Z

I want to convert the date range from user input to date range from API. How can I achieve that?

EXPECTED: I want to compare the values two date-ranges and depending on that 
I will perform certain export functionality.
    The user input date-range could 
     - fall completely within the date-range of the API
    - or at least one of the date values could fall or overlap within the 
      date-range from the API.

should overlap the date range from the API.

this is my date range picker handle()

handleDatePickerChange = (setSelectedDayRange) => {
    console.log("initializing handleDatePickerChange()");
    console.log("setSelectedDayRange", setSelectedDayRange);
    // TODO
    // convert the dates
    let convertedDateFrom = moment(setSelectedDayRange.from).toISOString();
    console.log("convertedDateFrom", convertedDateFrom);

    let convertedDateTo = moment(setSelectedDayRange.to).toISOString();
    console.log("convertedDateTo", convertedDateTo);

    // compare dates
    // if(convertedDateFrom ===  )
    // check if data exists

    this.setState({
      selectedDayRange: setSelectedDayRange,
    });
  };

Answer 1

Ciao, you could use function isBetween provided by moment in this way:

// interval comes from API
let dateAPIFrom = moment().toISOString();
let dateAPITo = moment().add(2, "days").toISOString();

// user date interval
let convertedDateFrom = moment(setSelectedDayRange.from).toISOString();
let convertedDateTo = moment(setSelectedDayRange.to).toISOString();

if (
  moment(convertedDateFrom)
    .subtract(1, "month")
    .isBetween(dateAPIFrom, dateAPITo) &&
  moment(convertedDateTo)
    .subtract(1, "month")
    .isBetween(dateAPIFrom, dateAPITo)
) {

  //The user input date-range fall completely within the date-range of the API

} else if (
  moment(convertedDateFrom)
    .subtract(1, "month")
    .isBetween(dateAPIFrom, dateAPITo) ||
  moment(convertedDateTo)
    .subtract(1, "month")
    .isBetween(dateAPIFrom, dateAPITo)
) {

  //or at least one of the date values could fall or overlap within the date-range from the API.
 
}

.subtract(1, "month") because moment({day: 19, month: 8, year: 2020}).toISOString() returns always month + 1.

Here your codesandbox modified.