I use the following code in Javascript to get the difference between two Date objects. I want the result to return the difference in:seconds if the result is less than 60 secsminutes if the result is less than 60 minshours if the result is less than 24 hoursdays otherwiseThe code is very long and I see lots of code duplication. Isn't there a smarter/shorter way to do this (without using a library)?function dateDiff(a, b) {  let utc1 = Date.UTC(a.getFullYear(), a.getMonth(), a.getDate(), a.getUTCHours(), a.getUTCMinutes(), a.getUTCSeconds());  let utc2 = Date.UTC(b.getFullYear(), b.getMonth(), b.getDate(), b.getUTCHours(), b.getUTCMinutes(), b.getUTCSeconds());  let result = (utc2 - utc1) / (1000 * 60 * 60 * 24);  let floor = Math.floor(result);  if (floor > 0) return floor + d;  result *= 24;  floor = Math.floor(result);  if (floor > 0) return floor + h;  result *= 60;  floor = Math.floor(result);  if (floor > 0) return floor + min;  result *= 60;  floor = Math.floor(result);  if (floor > 0) return floor + sec;}
Get the difference between two dates, in the most convenient unit
javascript;datetime;ecmascript 6