Install

npm install --save https://github.com/jrc03c/custom-scroller

Use

<script src="path/to/custom-scroller.js"></script>
<script>
  const myScrollingElement = document.querySelector("#my-scrolling-element")
  const x = 50
  const y = 250
  const ms = 1500
  const linearEasing = x => x // optional; defaults to sine easing
  const scroller = new CustomScroller(myScrollingElement, linearEasing)

  scroller.scrollTo(x, y, ms).then(() => {
    // do something cool
  })
</script>

If you need to stop the scrolling suddenly, use scroller.stop() (which returns a Promise that resolves when the scroller has come to a standstill). Also, calling the scrollTo method before a previous scroll has finished will stop the previous scroll and start the new one.