Can't scroll up back when container DIV tabIndex is less than 0
overflow-y: scroll
overflow: unset
overflow-y: scroll
<p> tag container overflow: unset
This is a paragraph tabIndex=1. This is a paragraph tabIndex=1. This is a paragraph tabIndex=1. This is a paragraph tabIndex=1. This is a paragraph tabIndex=1. This is a paragraph tabIndex=1. This is a paragraph tabIndex=1. This is a paragraph tabIndex=1.
Can't scroll when scrollable area is tabIndex<0 This is a paragraph no tabIndex. This is a paragraph no tabIndex. This is a paragraph no tabIndex. This is a paragraph no tabIndex. This is a paragraph no tabIndex. This is a paragraph no tabIndex. This is a paragraph no tabIndex. This is a paragraph no tabIndex. This is a paragraph no tabIndex.
Can't scroll up This is a DIV tabIndex=1 without delegation. This is a DIV tabIndex=1 without delegation. This is a DIV tabIndex=1 without delegation. This is a DIV tabIndex=1 without delegation. This is a DIV tabIndex=1 without delegation. This is a DIV tabIndex=1 without delegation.
Can't scroll when scrollable area is tabIndex<0 This is a DIV no tabIndex, no delegation. This is a DIV no tabIndex, no delegation. This is a DIV no tabIndex, no delegation. This is a DIV no tabIndex, no delegation. This is a DIV no tabIndex, no delegation. This is a DIV no tabIndex, no delegation. This is a DIV no tabIndex, no delegation.