function syncPlaylist(durationText) {
    var durationTimeSelectors = document.querySelectorAll('.amplitude-duration-time[data-amplitude-playlist="' + _config2.default.active_playlist + '"]');

    for (var i = 0; i < durationTimeSelectors.length; i++) {
      var songIndex = durationTimeSelectors[i].getAttribute("data-amplitude-song-index");

      if (songIndex == null) {
        durationTimeSelectors[i].innerHTML = durationText;
      }
    }
  }
Sync the playlist duration times.

@param {Object} durationText - The text for the song duration.