🐞 Bug: Svelte strips styles of components that export only snippets

[katriellucas]

Describe the bug

IF snippets have styles, they are ignored and removed/stripped from the build (but on local/dev is fine).

Reproduction

Make a .svelte file that export snippets only, then add styles on these exported snippets, import it in any file/page, build with bun run build (or npm), then bun run preview, no styles will be generated.

https://svelte.dev/playground/untitled?version=5.36.4#H4sIAAAAAAAACnWQzU7EIBDHX4WMFzep7R3rxn0G40k8sGVqiHQgMNXdEN7d0K3R-nFj_h_wYzKQnhAkPBJbdmiggdE6TCCfMvA5VK8K0HwmDyG06Q0dV-2oE_6lD54YiRNI6NMQbeC9IsV2Cj6yyOKBbBBFjNFPQkHb1XltK1DUd18lyvcRyWBcStcKbkREo2BXoAHGE4PkOGNp_uH9dvUWeGv8JhaTN7PDBRxPG_CfhFeJbAjIF8TBOx93pfb6IAanU7pTsEDv82KWvgt7RblbezVLfeLz-lwb0YhcT4qPenh9iX4mI-vHb6t6AVji2yU8N8DaundLBuSoXcLyATvzYuXjAQAA

App for the IDE.

svelte-app.zip

System Info

System:
    OS: Windows 11 10.0.26100
    CPU: (16) x64 AMD Ryzen 7 5700U with Radeon Graphics
    Memory: 3.87 GB / 15.35 GB
  Binaries:
    Node: 22.14.0 - C:\Program Files\nodejs\node.EXE
    npm: 11.2.0 - C:\Program Files\nodejs\npm.CMD
    bun: 1.2.18 - ~\AppData\Roaming\npm\bun.CMD
  Browsers: {}

Severity

annoyance

[PatrickG]

Is the repl supposed to show the issue?
Because in the repl it seems to work just fine.

[katriellucas]

Is the repl supposed to show the issue? Because in the repl it seems to work just fine.

No, it's there so it's possible to download the application, as explained, you must build the application, which is why I have put a download too. There is no issue in dev-mode, CSS is only stripped after building.

[oliverturner]

I'm also seeing this behaviour: snippets are styled correctly in dev mode, but missing once built