.ReactVirtualized__Grid__innerScrollContainer[style] {overflow:visible !important;}
Version 9 of react-select
uses inline styles to set overflow. I used this so the tooltip was seen below the end of the grid (when the grid doesn't take the whole screen). See react select library code snippet:
<div
className="ReactVirtualized__Grid__innerScrollContainer"
role={containerRole}
style={{
width: autoContainerWidth ? 'auto' : totalColumnsWidth,
height: totalRowsHeight,
maxWidth: totalColumnsWidth,
maxHeight: totalRowsHeight,
overflow: 'hidden',
pointerEvents: isScrolling ? 'none' : '',
position: 'relative',
...containerStyle,
}}>
And that is in https://github.com/bvaughn/react-virtualized/blob/438b5672e5364cffa91f21656ee2f04003794ca1/source/Grid/Grid.js#L1058