moment better duration

duration.js

export function duration(ms) {
    if(!ms) return 'N/A';
    if(ms < (60 * 1000)) {
      let dur = Math.floor(ms / 1000);
      if(dur < 2) return 'a second';
      return dur + ' seconds';
    }
    if(ms < (60 * 60 * 1000)) {
        let minutes = Math.floor(ms / 1000 / 60);
        let seconds = Math.floor(ms % (1000 * 60) / 1000);
        let dur = minutes + ' min ';
        if(seconds) dur += seconds + ' sec';
        return dur;
    }
    return moment.duration(ms).humanize();
}