Page is a UI component that represents an application screen. NativeScript apps typically consist of one or more <Page> that wrap content such as an <ActionBar> and other UI widgets. refer
Page takes onBackNavigation which should be used to SyncFrame
Example SyncFrame bool -> ( { model | rootFrame = Frame.handleBack bool model.rootFrame }, Cmd.none )
Page takes only one child
Similar to page but actionBar support
Used to make modal page