Rail Navigation provides a compact vertical navigation rail with icons and short labels. Use it when the app or workspace needs navigation but there is not enough space for a full sidebar.
Use it for narrow editor or workspace navigation, secondary product navigation, compact admin shells, and switching between primary sections.
Do not use Rail Navigation when you need a full sidebar with groups, nested navigation, or supporting content; use Sidebar or Sidenav. Do not place it inside ngs-sidebar, because Sidebar has its own navigation. Use Navigation for normal section navigation in content.