How to convert a Google Play Music Playlist to CSV

read-google-play-music-playlist-to-csv.js

// open playlist or album
// paste this into the console in dev tools (F12) of browser:
var seenSongs = {};
var seenSongTitles = {};
var playlistTable = document.querySelectorAll('.song-table tbody')[0];

function printSongs() {
  let playlist = playlistTable.querySelectorAll('tr.song-row');
  for(let i = 0; i < playlist.length; i++) {  
    let l = playlist[i];
    let index = l.querySelectorAll('td[data-col="index"] .column-content')[0].textContent;
    let title = l.querySelectorAll('td[data-col="title"] .column-content')[0].textContent;
    if (!(index in seenSongs) && !(title in seenSongTitles)) {
      let artist = l.querySelectorAll('td[data-col="artist"] .column-content')[0].textContent;
      let album = l.querySelectorAll('td[data-col="album"] .column-content')[0].textContent;
      seenSongs[index] = artist + '|' + title + '|' + album;
      seenSongTitles[title] = artist + '|' + title + '|' + album;
      console.log(artist + '|' + title + '|' + album); 
    }
  }
}

printSongs();

var observer = new MutationObserver(function(mutations) {
  mutations.forEach(function(mutation) {
    if (mutation.attributeName === 'data-start-index') {
      printSongs();
    }
  });
});

observer.observe(playlistTable, { attributes: true });