Get Playlists playtime

youtube_playlist_time_getter.js

String.prototype.format = function() {
  a = this;
  for (k in arguments) {
    a = a.replace("{" + k + "}", arguments[k])
  }
  return a
}

var playList = document.getElementsByTagName('ytd-two-column-browse-results-renderer');
playList = playList[0];

var musics = playList.getElementsByClassName('ytd-thumbnail-overlay-time-status-renderer');
var musicList = Array.prototype.slice.call(musics);

var allSecs = 0;

for(let i=0; i<musicList.length; i++){
  const v = musicList[i];
  const innerValue = v.innerHTML.replace(/\n/g, "").replace(/\s+/, ""); 
  const innerTimes = innerValue.split(':');

  for(let j=0; j<innerTimes.length; j++) {
    allSecs += innerTimes[j] * ( 60 ** (innerTimes.length - j - 1));
  }
}


var hour = Math.floor(allSecs/(60**2));
var minute = Math.floor((allSecs%(60**2))/60);
var second = allSecs%60;

var title = document.getElementById('title').innerText;

var result_string = "플레이리스트 \"{3}\"의 재생 시간은\n{0}시간 {1}분 {2}초 입니다.";
console.log(result_string.format(hour, minute, second, title));