How not to reference the dot in numbly

[Sinthoras]

Short description

I use numbly to customize the numbering of my headings and my numberings end with a dot, but when I reference a heading, I do not want these dots unwanted dots.

Minimal working example

With the code

#import "@preview/numbly:0.1.0": numbly
#let sectionnumbering = ("{1:I.}", "{1:I.}{2:1}.")
#set heading(numbering: numbly(..sectionnumbering))

= Test<sec:sec1>
== Test
In @sec:sec1 we showed, ...

I get the output:

If I instead use

#set heading(numbering: "I.")

= Test<sec:sec1>
== Test
In @sec:sec1 we showed, ...

I get the output

so in the reference there is no dot after the numbering.

Final question

How can I still use numbly, but get rid of the unwanted dots?

[Y.D.X]

In your case, numbly is unnecessary, and "I.1." will just work.
Refer to Numbering Function – Typst Documentation for explanation.

#set heading(numbering: "I.1.")

= Alpha <a>
== Beta <b>
- Alpha: @a
- Beta: @b

If you want full customization, please refer to Reference Function – Typst Documentation.
For example:

#import "@preview/numbly:0.1.0": numbly
#set heading(
  numbering: numbly("{1:I} 😺", "{1:I}.{2:1} 😺"),
  // Or simply `numbering: "I.1."`
)

#show ref: it => {
  let el = it.element
  if el != none or el.func() == heading {
    // Override heading references.
    [Section ]
    numbering(
      numbly("👻 {1:I}", "👻 {1:I}.{2:1}"),
      ..counter(heading).at(el.location()),
    )
  } else {
    // Keep other references untouched.
    it
  }
}

= Alpha <a>
== Beta <b>
- Alpha: @a
- Beta: @b

Notes for developers

• The "I.1." behaviour has not been documented properly yet?
• Each heading may have at least four forms, and the customization should be simpler.
• Option to hide last dot in refs to heading that had custom numbering. · Issue #6032 · typst/typst · GitHub

[Andrew]

@Y.D.X

The "I.1." behaviour has not been documented properly yet?

More flexible separators in numbering patterns · Issue #905 · typst/typst · GitHub?

[Y.D.X]

No, I mean the suffix is trimmed ("I.1." → "I.1") when a numbering pattern is referenced.

crates/typst-library/src/model/reference.rs

crates/typst-library/src/model/numbering.rs

[Andrew]

I guess it would go here.