Calculate difference between dates in days, hours, mins and secs

calcdiff.js

function getDifference(toD, fromD = new Date(), zeroPad = false) {
  let d1 = new Date(fromD); // Current date and time
  let d2 = new Date(toD); // Target date and time

  // Calculate difference in milliseconds
  let diffMs = Math.abs(d2 - d1);

  // Convert to respective units
  let diffSeconds = Math.floor(diffMs / 1000);
  let diffMinutes = Math.floor(diffSeconds / 60);
  let diffHours = Math.floor(diffMinutes / 60);
  let diffDays = Math.floor(diffHours / 24);

  diffHours = diffHours % 24;
  diffMinutes = diffMinutes % 60;
  diffSeconds = diffSeconds % 60;

  return {
    days: diffDays,
    hours: diffHours,
    minutes: diffMinutes,
    seconds: diffSeconds,
  };
}

let d = getDifference('2023-11-07T10:00:00', new Date());

const zeropaddedDiff = Object.keys(d).reduce((acc, key) => {
  acc[key] = zeroPad(d[key]);
  return acc;
}, {});

console.log(`${d.days} days, ${d.hours} hours, ${d.minutes} minutes, ${d.seconds} seconds`);
console.log(`${zeropaddedDiff.days} days, ${zeropaddedDiff.hours} hours, ${zeropaddedDiff.minutes} minutes, ${zeropaddedDiff.seconds} seconds`);