Cannot import TS types from Svelte components in .svelte.ts files

[Bilge]

Describe the bug

I cannot import types exported in a <script module lang="ts"> block in a .svelte.ts file (I can import them in other .svelte files).

TS complains that:

TS2614: Module '".svelte"' has no exported member 'ListRecord'. Did you mean to use 'import ListRecord from ".svelte"' instead?

Indeed, importing from "*.svelte" does actually work, but my editor thinks it's an error (and it sure does look wrong).

Reproduction

https://stackblitz.com/edit/sveltejs-kit-template-default-umuyfhqp?file=src%2Froutes%2FOtherTest.svelte.ts

Logs

No response

System Info

System:
    OS: Linux 5.15 Ubuntu 20.04.3 LTS (Focal Fossa)
    CPU: (8) x64 Intel(R) Core(TM) i7-9700K CPU @ 3.60GHz
    Memory: 7.56 GB / 11.69 GB
    Container: Yes
    Shell: 5.0.17 - /bin/bash
  Binaries:
    Node: 22.12.0 - /run/user/1000/fnm_multishells/1080_1735405309856/bin/node
    Yarn: 1.22.22 - /run/user/1000/fnm_multishells/1080_1735405309856/bin/yarn
    npm: 10.9.0 - /run/user/1000/fnm_multishells/1080_1735405309856/bin/npm
  npmPackages:
    svelte: ^5.0.0 => 5.15.0
    webpack: ^5.11.0 => 5.97.1

Severity

blocking all usage of svelte

[Ocean-OS]

This is probably some sort of compiler issue, since typescript AST nodes are removed during compilation, and Svelte IDE tools usually compile the component as a part of their process.

[paoloricciuti]

Mmm i feel like this is probably in @dominikg territory...can you confirm if it's something to fix in vite-plugin-svelte?

[Bilge]

FWIW I'm using Webpack, so if it is, it needs fixing in svelte-loader also.

[paoloricciuti]

FWIW I'm using Webpack, so if it is, it needs fixing in svelte-loader also.

Uhm then maybe it's not will try to take a look

[dummdidumm]

This is not a runtime / bundler issue. This has to do with language tools. Your editor does not seem to use the typescript plugin - what IDE are you using?

[dominikg]

as a workaround or maybe even a better practice, export the type from a separate types.ts file?

whats the usecase for exporting a type there? component props are the only ones i can think of rn but they should work without export