Sveltekit in a Turborepo Monorepo without ESBuild : can import JS files but not TS files

[MarArMar]

Describe the bug

In this monorepo (https://github.com/MarArMar/TurboSvelteKitTypia), within these Sveltekit projects :

• ✅ TS files from the same project work
• ✅ JS file from the PNPM workspace work
• ✅ On a regular Sveltekit install, TS files on the PNPM workspace work
• BUT When I import a TS file on the PNPM workspace work I get this :

Parse failure: Unexpected token (3:26)
At file: /@fs/TurboSvelteKitTypia/packages/common/log.ts
Contents of line 3: export const messageLoaded: string =

If I remove TS syntax from the TS file it works again. It seems the file is imported as JS

The file that loads other files is TurboSvelteKitTypia\apps\SvelteKitTS\src\routes+page.svelte

I have no idea if this is a Sveltekit issue specifically or not

Tried :

• putting the rollup-plugin-typescript2 plugin before the sveltekit plugin in the vite.config.ts, it didn't work
• importing the file with .ts at the end of the import, no effect
• importing the file from a relative path .ts at the end of the import, no effect (vite.config.ts can't import untranspiled ts files from other packages in the same monorepo vitejs/vite#5370 (comment))
• setting sourceMap: false, in the rollup-plugin-typescript2 plugin config, no effect (in tsconfig.json it does suppress a warning)
• setting allowImportingTsExtensions: true in the rollup-plugin-typescript2 plugin config & tsconfig, no effect (Can't make it work with Vite/Svelte samchon/typia#812 (comment))

Tried solutions proposed in :

• Turborepo SvelteKit: cannot import TS files from workspace ezolenko/rollup-plugin-typescript2#465
• vite.config.ts can't import untranspiled ts files from other packages in the same monorepo vitejs/vite#5370 (comment)
• Can't make it work with Vite/Svelte samchon/typia#812

Reproduction

Reproduction repo : https://github.com/MarArMar/TurboSvelteKitTypia

Setup

pnpm add turbo --global
pnpm install

Sveltekit with Js : working test

Dev

npx turbo run dev --filter=SvelteKitJS

Sveltekit with Ts : not working example

Dev

npx turbo run dev --filter=SvelteKitTS

Logs

Parse failure: Unexpected token (3:26)
At file: /@fs/TurboSvelteKitTypia/packages/common/log.ts
Contents of line 3: export const messageLoaded: string =

System Info

System:
    OS: Windows 10 10.0.19043
    CPU: (16) x64 11th Gen Intel(R) Core(TM) i7-11800H @ 2.30GHz
    Memory: 3.48 GB / 15.74 GB
  Binaries:
    Node: 18.17.1 - C:\Program Files\nodejs\node.EXE
    Yarn: 1.22.19 - ~\AppData\Roaming\npm\yarn.CMD
    npm: 9.6.7 - C:\Program Files\nodejs\npm.CMD
    pnpm: 8.8.0 - ~\AppData\Local\pnpm\pnpm.EXE
  Browsers:
    Edge: Spartan (44.19041.1266.0)
    Internet Explorer: 11.0.19041.1566
  npmPackages:
    @sveltejs/adapter-auto: ^2.0.0 => 2.1.1
    @sveltejs/kit: ^1.20.4 => 1.27.4
    svelte: ^4.0.5 => 4.2.7
    vite: ^4.4.2 => 4.5.0

Severity

annoyance

Additional Information

No response

[MarArMar]

Managed to make it work with " include: ["../../**/*.ts+(|x)"],"