When page_navbar() is used with fillable = FALSE and sidebar = NULL, we internally call bslib::page() which in turn calls shiny::bootstrapPage().
These functions cannot handle the class = "bslib-page-navbar" and instead add the text "bslib-page-navbar" directly into the page.
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page_func( |
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title = infer_window_title(title, window_title), |
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theme = theme, |
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lang = lang, |
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class = "bslib-page-navbar", |
page(class = "bslib-page-navbar") |> print(browse = FALSE)
#> bslib-page-navbar
