$(document).ready(function () {
  let bpmCounter = new BpmCounter();
});

@@ -66,8 +66,116 @@
 ();%0A
-%7D);
+%0A  $(document.body).on(%22keydown%22, handleKeyDown);%0A%7D);%0A%0Afunction handleKeyDown () %7B%0A  console.log(%22Key down%22);%0A%7D
 %0A

Handle keydown