Feature Request: allow specifying nav style for `page_navbar()`

[nteetor]

BS5 made changing the style of the nav component nicely straightforward, https://getbootstrap.com/docs/5.3/components/navs-tabs/#available-styles. I am hoping bslib could allow developers to add the various nav style classes to the nav component of page_navbar(). Alternatively, the developer could pass in a navset_ call?

[cpsievert]

You can do a good amount of this today via tagAppendAttributes()'s new-ish .cssSelector:

library(bslib)
library(htmltools)

navset_card_pill(nav_panel("A", "a"), nav_panel("B", "b")) |>
  tagAppendAttributes(class = "justify-content-center", .cssSelector = ".nav")

Note that {bslib} isn't yet up-to-date with Bootstrap 5.3 though, so .nav-underline doesn't work (yet)

[nteetor]

I'm currently using a small bit of JS to apply the nav-pills class to the navigation bar nav.

[gadenbuie]

FYI: In the next release (or current dev) we now have navset_underline(), navset_card_underline() and page_navbar(underline = TRUE).

I'm leaving this issue open though because we should still think about a way to pass attributes to the navset constructor.