string
`id` of the current destination.
NavigationBarItem[]
Destinations, same shape as `NavigationBar`'s. Three to seven per M3.
"top" | "center"
default: "top"
Where the destinations sit vertically. Defaults to `"top"`.
React.ReactNode
Pinned to the bottom of the rail.
React.ReactNode
Above the destinations: typically a menu `IconButton` and/or a `FAB`.
"always" | "selected" | "none"
default: "always"
`"always"` labels every destination, `"selected"` only the active one,
`"none"` none (the label is still the accessible name). Defaults to `"always"`.