Toast breaks if svelte config compilerOptions are used

[adamdva]

Current Behavior

in svelte.config.js if we enable:
compilerOptions: { preserveComments: true, preserveWhitespace: true, },

skeleton Toasts no longer are displayed.

Expected Behavior

Toasts should still be added to the Dom

Steps To Reproduce

1. in svelte.config.js enable:
   compilerOptions: { preserveComments: true, preserveWhitespace: true, },
2. Toasts no longer are added to the Dom

Stackblitz or Reproduction URL

No response

Environment Information

System: Windows 11
"vite": "^7.3.1",
"svelte": "^5.46.4",
"@skeletonlabs/skeleton": "^4.9.0",
"@skeletonlabs/skeleton-svelte": "^4.9.0",
node: v24.10.0
pnpm: v10.27.0

More Information

No response

[endigo9740]

@adamdva two things here:

1. We would really prefer if folks file a minimal reproduction for bugs like this. That's why we prompt for it.
2. I would ask for your help identifying if this issue is specific to Skeleton, or upstream as part of Zag.js

Off hand I'm not quite sure why preserving comments and whitespace would break functionality like this, unless perhaps your markup whitespace was invalid in some capacity. Another reason a reproduction will be helpful here. That way we can see the issue in scope.

Per that second item - you can find everything you need for the Zag Svelte toast primitive here:
https://zagjs.com/components/svelte/toast
(I'm available if you have questions)

If we identify this as being specific to Zag, then this issue will need to be reported upstream here:
https://github.com/chakra-ui/zag