pub type VisibilityCallback = Rc<dyn Fn(PageVisibility)>;Expand description
A page-visibility observer, registered per page via
PushOptions::on_visibility (or NavigatorView::on_root_visibility for
the root page). Fired by the navigator from a rebuild whenever the page’s
PageVisibility changes — never twice with the same value.
Aliased Type§
pub struct VisibilityCallback { /* private fields */ }