converting seconds to an object containing hours, minutes, and seconds, respectively.

secondsToHours.js

const SECONDS_PER_HOUR   = 3600;
const SECONDS_PER_MINUTE = 60;

function toFloor (value) {
  return Math.floor(value);
}

function secondsToHours (secs) {
  const hours   = toFloor(secs / SECONDS_PER_HOUR);
  const minutes = toFloor(secs % SECONDS_PER_HOUR / SECONDS_PER_MINUTE);
  const seconds = secs % SECONDS_PER_MINUTE;

  return {
    h: hours,
    m: minutes,
    s: seconds
  }
}

// usage examples
console.log(secondsToHours(108000)); // 30h 0m 0s
console.log(secondsToHours(694));    // 0h 11m 34s
console.log(secondsToHours(3599));   // 0h 59m 59s