Fix babel config

.babelrc

+{
+  "presets": [
+    [
+      "env",
+      {
+        "modules": false
+      }
+    ],
+    "stage-3"
+  ]
+}

src/player.js

@@ -30,6 +30,7 @@ new Vue({
                     setup(myArr);
                 }
             };
+
             xmlhttp.open("GET", url, true);
             xmlhttp.send();
 
@@ -46,7 +47,6 @@ new Vue({
         var audio = this.audio
         this.audio.onloadedmetadata = function () {audio.play()}
         this.reloadData()
-
     },
     template: '<div>' +
     '</a><div class="thumbnail"><img v-bind:src="cover" alt="cover"/><div class="caption">' +