In Firefox I noticed some flickering when dragging a lower item to the top edge of the black box on this page: https://www.dflex.dev/demo/lists/asymmetric/ it might need some debouncing or something since it appears to be repeatedly redordering when it's in right on the edge/border (might not be a standard usecase but it was noticeable).
Demos in the site are behind the current version and not being updated to the latest one [1]. And updating the demos will take a while since I have to take resizing containers into consideration. So the current version is 2.x.x while the last one was 3.7.0. Sorry about that.
It's not the size of the package. DFlex is actually small compared to other libraries. But I need to reconsider the size of the demo container before updating the version because when you resize there's a possibility to add a scroll to the container. Adding/removing scroll while dragging is not shipped yet.
I came across Shopify's recently which has an amazing website: https://shopify.github.io/draggable/
In Firefox I noticed some flickering when dragging a lower item to the top edge of the black box on this page: https://www.dflex.dev/demo/lists/asymmetric/ it might need some debouncing or something since it appears to be repeatedly redordering when it's in right on the edge/border (might not be a standard usecase but it was noticeable).