How to build a scrollbar using Draggable

[eguneys]

Draggable.create("#scrollThumb", {
  type: "y",
  bounds: "#scrollTrack",
  onDrag: function() {
    var delta = pointerEvent.movementY;

    // use delta to scroll page
  }
}

This code works fine mostly to build a scrollbar. But it moves the page a little more than usual if I drag faster. What could be a better way to prevent this issue?

[Diaco]

Hi eguneys 

 

that's better to use draggable this.x / this.y , any way pls provide a Codepen Demo if you have any problem .