You can see my work here: GitHub - html-next/smoke-and-mirrors: Ambitious infinite-scroll and svelte rendering for ambitious applications.
The magic-collection-view and core-container-view are WIP versions of MagicCollectionView that I’m working on here for the moment.
the most complete code (and functional, both are now in use by me) are occlusion-collection and cacheable-view.
This is very VERY WIP and I don’t recommend installing it, but you can likely get some insights from it.