Calculation between times in Javascript using moment.js

calculationBetweenTimes.js

const calculationBetweenTimes = (startTime, endTime) => {
  let diff = moment(endTime, 'HH:mm').diff(moment(startTime, 'HH:mm'))
  let d = moment.duration(diff);
  let hours = Math.floor(d.asHours());
  let minutes = moment.utc(diff).format("mm");
  return {
    hours: hours,
    minutes: minutes,
  }
};

let calculation = calculationBetweenTimes("15:00", "17:30");

console.log(calculation);