formatting a duration (in millisecond) to human readable format using javascript

formatDuration_seconds.js

const formatDuration = s => {
  if (s < 0) s = -s;
  const time = {
    day: Math.floor(s / 86400),
    hour: Math.floor(s / 3600) % 24,
    minute: Math.floor(s / 60) % 60,
    second: Math.floor(s) % 60
  };
  return Object.entries(time)
    .filter(val => val[1] !== 0)
    .map(([key, val]) => `${val} ${key}${val !== 1 ? 's' : ''}`)
    .join(', ');
};

// example
formatDuration(1); // '1 second'
formatDuration(34325055); // '397 days, 6 hours, 44 minutes, 15 seconds'