How to make scrolling for Paper.js?

Question

JavaScript

I'm trying to make scrolling for Paper.js. There is a Canvas element for which the dragup and dragdown events fire. I get the event object and substitute the deltaY value as the offset for the scrollBy method.

function dragUp(event) {
        paper.view.scrollBy(new paper.Point(0, event.gesture.deltaY));
      }
      function dragDown(event) {
        paper.view.scrollBy(new paper.Point(0, event.gesture.deltaY));
      }

      element.on('dragup', dragUp).on('dragdown', dragDown);

Scrolling works, but it turns out ugly. I want kinetic scrolling like on iOS, so that everything is smooth and smooth. I didn’t go to physics at school, so I don’t even know how to approach the problem. But if it's too non-trivial, then just normal scrolling will do. What is the formula for doing this?