sadly mounted scroll events does not have set_scroll_pos() method !!

[limber grove]

    let mut text_area_mounted_data: Signal<Option<Rc<MountedData>>> = use_signal(|| None);
    let text_area_current_pos = use_resource(move || async move {
        match text_area_mounted_data() {
            Some(m) => (*m).get_scroll_offset().await.unwrap_or_default().y,
            _ => 0.0,
        }
    });
    /*let text_area_pos_value =
    use_memo(move || text_area_current_pos.value().read().unwrap_or_default());*/
    let mut line_number_scroll_mounted: Signal<Option<Rc<MountedData>>> = use_signal(|| None);

I will checkout web-sys after failing for 3 consecutive days

[digital mural]

@limber grove What are you trying to do?

I see you've fixed your issue