humanDuration.js

humanDuration.js

function humanDuration(number, unit = "s") {
  let result;
  switch (unit) {
    case "ns":
      result = number / 1000000;
      if (result < 1) break;
      number = result;
      unit = "ms";
    case "ms":
      result = number / 1000;
      if (result < 1) break;
      number = result;
      unit = "s";
    case "s":
      result = number / 60;
      if (result < 1) break;
      number = result;
      unit = "m";
    case "m":
      result = number / 60;
      if (result < 1) break;
      number = result;
      unit = "h";
    case "h":
      result = number / 24;
      if (result < 1) break;
      number = result;
      unit = "d";
    case "d":
    // no larger
    default:
      break;
  }
  return `${number.toFixed(3)}${unit}`;
}

console.log(humanDuration(600000, "s")); // -> "6.994d"
console.log(humanDuration(4, "m")); // -> "4.000m"

https://www.carlyzach.com/functions/playground/16ee1e2cc0c1aa63f3e3a781f2b22da8

💻 Edit or ⏯️ run this Gist on the www.CarlyZach.com code playground 💻