javascript - Detect element inside div in react

Question

Im thinking about way to detect a element index when this element is inside of some other element.

So red box is my div, black box is centered absolute in center of this div. 1,2,3 are the list element. How to detect on scroll when list element is inside of black div?

question from:https://stackoverflow.com/questions/65922804/detect-element-inside-div-in-react

Answer 1

Waitting for answers