I just tried to do what you suggested. I gave the heading of the bibliography a label <bib> and set the page count like this:

context {
  let page-count = counter(page).at(<bib>)

  set page(
    numbering: [1 of #page-count]
  )
  counter(page).update(1)
}

But I'm honestly not sure how to pass the label to the at() function and how to then pass the value to numbering.

Here is a small example of what I mean:

#set page("a8")
#set page(
  numbering: (n, _) => [
    #n of #context numbering("1", ..counter(page).at(<end>))
  ]
)

#lorem(100)

#metadata(none) <end>
#set page(numbering: "A")
#counter(page).update(1)
#lorem(30)

Hope that helps.

First of all, thanks for the suggestion 🙏🏻

I tried your suggestion but didn't get it to work. When I do:

set page(
  numbering: (n, _) => [
    #n of #context numbering("1", ..counter(page).at(<end>))
  ],
)

I get:

error: missing argument: pattern parameter
      ┌─ @local/supercharged-dhbw:1.3.2/lib.typ:247:17
       │
247 │       numbering: (n, _) => [

I don't know how to pass the pattern here correctly. As I understand it, the variable n is the pattern, but where should the pattern come from?

I also tried this:

set page(
  numbering: [1 of #str(context counter(page).at(<end>).first())],
)

But this try also failed:

error: expected integer, float, version, bytes, label, type, or string, found content
      ┌─ @local/supercharged-dhbw:1.3.2/lib.typ:250:28
       │
250 │       numbering: [1 of #str(context counter(page).at(<end>).first())],

Is there any way to easier debug this because the errors don't really help me here.

Sorry, I should have written a more resilient version. The pattern parameter is _ and the problem is that the numbering is called with just a single page number instead of a pair. Replacing _ with .. would fix this particular issue.

However, upon further consideration, having a 1 of x as #set page(numbering: ..) is still problematic because you'll, for instance, also see the "of x" part in the outline. I would recommend having just #set page(numbering: "1") and adding a header or footer manually with the "of x" part in there. Alternatively, you can change the numbering conditionally based on whether the second parameter exists (with a parameter ..sink), but the other thing is simpler.

Something like:

#set page(
  numbering: "1",
  footer: context align(center, numbering(
    "1 of 1", 
    ..counter(page).get(),
    ..counter(page).at(<end>),
  ))
)

The numbering style 1 of x is only used in the main section. The outline and other pages before the introduction use Roman numbering, so this is no problem.

Thanks a lot for your help!

Yeah, there's for sure more work to be done on the docs side!