Function use_prevent_scroll 

pub fn use_prevent_scroll<F>(
    should_prevent: F,
    hide_delay: Duration,
) -> RenderEffect<()>
where
    F: Fn() -> bool + 'static,

A utility that prevents scrolling on the document body when a condition is true.

This is useful for modals, dialogs, and other overlay components that should prevent background scrolling. It also compensates for scrollbar width to prevent layout shift.

Example

let is_open = RwSignal::new(false);

let _effect = use_prevent_scroll(
    move || is_open.get(),
    Duration::from_millis(200)
);