I found the mouse cursor controls for selecting to be worse than SlateJS, very difficult to select a portion of text in a very large document (copy/paste from something huge).
So this is a view layer for Svelte of Slate? Like if I used Svelte I would add this in to get SlateJS incorporated in my app? I don't have a lot of context for this, could you tell us more about the project and your motivations?
Edit: Also this looks neat, thank you!