How can i type this scroll event

Hi i’m making an infinite scroll event to trigger new fetch on React Query, the problem is that i can’t find a way to type this on typescript

function onScroll(this: Document, ev: ScrollBehavior<EventListener>) {
  const { scrollHeight, scrollTop, clientHeight } = ev.target.scrollingElement;

  if (hasNextPage && scrollHeight - scrollTop <= clientHeight * 1.2) {
    fetchNextPage();
  }
}

>Solution :

event.target will never be document, you have to access document directly

function onScroll() {
  const { scrollHeight, scrollTop, clientHeight } = document.scrollingElement;

  if (hasNextPage && scrollHeight - scrollTop <= clientHeight * 1.2) {
    fetchNextPage();
  }
}