On Sat, 20 Mar 2021, Christoph Reller wrote:
> Of course we can do this in lua:
>
> if tex.modes["A"] and not tex.modes{"B"] then
> ...
> end
... which means that you can use that at the context end as well (old feature).
Save the following as test.mkix (or add "% macros=mkix" as the first line):
```
\starttext
<?lua if tex.modes["A"] and not tex.modes["B"] then ?>
\starttyping
A and not B
\stoptyping
<?lua else ?>
\starttyping
not (A and not B)
\stoptyping
<?lua end ?>
\stoptext
```
See the templates manual for more details:
https://www.pragma-ade.com/general/manuals/templates-mkiv.pdf
Aditya
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