Describe the bug
As per this comment from @Rich-Harris, after #6174 FOUC should not be possible when we are importing global css within root layout.
I have been using a style javascript library that needs to be loaded before any DOM content gets loaded. I could see FOUC happening. This is different than the scenario where styles are imported which, as per the comment, gets imported as style tag.
Reproduction
https://stackblitz.com/edit/sveltejs-kit-template-default-7xrgjy?file=src%2Froutes%2F%2Blayout.svelte,package.json,package-lock.json&terminal=dev
In the following reproduction one can see a flicker of FOUC TEST happening on the right hand side of the band. It's best to see the preview in a separate tab.
Logs
No response
System Info
@sveltejs/kit: 1.0.0-next.431
vite: 3.0.9
Severity
annoyance
Additional Information
No response