issue.xpub.nl/12/player.js

var track = document.querySelector("track_1"), 
	track_div = document.getElementById("track_1");
track_1.addEventListener('cuechange', function () {
  let cues = track_1.track_1.activeCues;  // array of current cues
  console.log("cuechange", cues, cues[0].text, cues[0].startTime, cues[0].endTime);
  var d = JSON.parse(cues[0].text);
  console.log("d",d);
  track_div.innerHTML = d.title;
  var old = document.querySelector(".now_playing");
  	if (old) {
      old.classList.remove("now_playing");
    }
  var playing = document.getElementById(d.title);
  playing.classList.add("now_playing");
  console.log("playing",playing);
});