Semantic UI React 3.0.0-beta.0src/elements/Rail/Rail.jsRailA rail is used to show accompanying content outside the boundaries of the main view of a site.
Types
Rail
A rail can be presented on the left or right side of a container.
Internal
A rail can attach itself to the inside of a container.
Dividing
A rail can create a division between itself and a container.
Variations
Attached
A rail can appear attached to the main viewport.
Close
A rail can appear closer to the main viewport.
Size
A rail can have different sizes.
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Blazing deployments by 
Vercel.
Vercel.