R Under development (unstable) (2024-05-16 r86559 ucrt) -- "Unsuffered Consequences"
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Platform: x86_64-w64-mingw32/x64

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> library(litedown)
> f = tempfile()
> if (file.create(f)) {
+   # create full HTML
+   opts = options(litedown.html.template = TRUE)
+   mark(f)
+   options(opts)
+ 
+   # create fragment
+   mark(f)
+   unlink(f)
+ }
> 
> mark(character(0))
> mark('')

> 
> proc.time()
   user  system elapsed 
   0.31    0.09    0.39