I haven’t used it with htmx, but DOM morphing seems like it’s probably a good solution to this.
https://v1.htmx.org/extensions/morphdom-swap/
https://github.com/patrick-steele-idem/morphdom/issues/261
This issue is reporting the same kind of thing - text selection is lost on re-render
https://github.com/patrick-steele-idem/morphdom/issues/261
This issue is reporting the same kind of thing - text selection is lost on re-render