Rows in <List> unmount and then mount when they leave the active window

Thanks for the awesome library!

I noticed some strange behavior with the List related to the overscanRowCount setting. Let’s say there are 10 rows visible and overscanRowCount is set 10. When I scroll the list such that a row leaves the visible region, but is still within the overscan radius, the component is unmounted and then instantly re-rendered. This is an issue since it causes unnecessary re-renders and resets the local state of the components as they leave the screen.

If this is indeed a bug, and not expected behavior, I’d be happy to code up a minimal reproduction and help work toward a fix!

Thanks!

[bvaughn]

True, it could, but every configurable property has a cost (in runtime complexity, code management complexity, API complexity/understandability, etc.)

In this case, I’m not really convinced that the cost is justified. I could change my mind though. 😃

[bvaughn]

Is there a benefit to removing the “trailing” rows?

Limiting the total number of rows rendered. This matters more when there are overscanned rows and columns b’c the number grows faster.