issue.xpub.nl/12/player.js

var track = document.querySelector("track_1"), 
	track_1_div = document.getElementById("track_1");
track_1.addEventListener('cuechange', function () {
  let cues_1 = track_1.track_1.activeCues;  // array of current cues
  console.log("cuechange", cues_1, cues_1[0].text, cues_1[0].startTime, cues_1[0].endTime);
  var d_1 = JSON.parse(cues_1[0].text);
  console.log("d_1",d_1);
  track_1_div.innerHTML = d_1.title;
  var old = document.querySelector(".now_playing");
  	if (old) {
      old.classList.remove("now_playing");
    }
  var playing = document.getElementById(d_1.title);
  playing.classList.add("now_playing");
  console.log("playing",playing);
});