From seconds to human readeable hour in TypeScript

fromSecondsToHour.ts

export function fromSecondsToHHMMSS(value: string) {
    const sec = parseInt(value, 10); // convert value to number if it's string
    const hours   = Math.floor(sec / 3600); // get hours
    const minutes = Math.floor((sec - (hours * 3600)) / 60); // get minutes
    const seconds = sec - (hours * 3600) - (minutes * 60); //  get seconds
    // add 0 if value < 10; Example: 2 => 02
    function padWithZero(val: number) {
      if (val < 10) {
        return `0${val}`;
      }
      return val;
    }
    return `${padWithZero(hours)}:${padWithZero(minutes)}:${padWithZero(seconds)}`;
}