Update '12/player2.js'

12/player2.js

@@ -5,7 +5,7 @@ function player(element){
     console.log("cuechange", cues, cues[0].text, cues[0].startTime, cues[0].endTime);
     var d = JSON.parse(cues[0].text);
     console.log("d",d);
-    var old = document.querySelector(".now_playing");
+    var old = element.querySelector(".now_playing");
       if (old) {
         old.classList.remove("now_playing");
       }