Update '12/dragable.js'

12/dragable.js

@@ -1,8 +1,8 @@
    
 function makeDragable(dragHandle, dragTarget) {
-  let dragObj = null; //object to be moved
-  let xOffset = 0; //used to prevent dragged object jumping to mouse location
-  let yOffset = 0;
+  var dragObj = null; //object to be moved
+  var xOffset = 0; //used to prevent dragged object jumping to mouse location
+  var yOffset = 0;
 
   document.querySelector(dragHandle).addEventListener("mousedown", startDrag, true);
   document.querySelector(dragHandle).addEventListener("touchstart", startDrag, true);