"error: unknown variable" if variable is used inside #include

[jsx97]

document.typ:

#set par(justify: true)

#let pseudoheading(body) = {
  set align(center)
  set par(justify: false)
  smallcaps(body)
}

#lorem(25)

#include "include.typ"

include.typ:

#lorem(25)

#pseudoheading[
  Lorem ipsum dolor sit ametxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx, consectetur adipiscing elit
]

#lorem(25)

I get error: unknown variable: pseudoheading. How to make it work?

[jamesrswift]

Each typst file exists in its own scope, and does not bring with it any definitions when included. I'd recommend creating a file that defines functions you intend to reuse:

/// preamble.typ
#let pseudoheading(body) = {
  set align(center)
  set par(justify: false)
  smallcaps(body)
}

and import it from your file

/// include.typ
#import "preamble.typ": pseudoheading

#pseudoheading[
  Lorem ipsum dolor sit ametxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx, consectetur adipiscing elit
]

[hurzl]

It is also not possible to include #set definitions via included files.
I have to define functions and activate them via #show - What's the reason for this complication?

[jsx97]

Sounds interesting. Could you show an example?

[hurzl]

#include "red.typ"  // no effect

#import "red.typ": *
#show:redt

red text

red.typ:

#set text(fill:red)  // no effect

#let redt = { set text(fill:red) }