vitest install error: No overload matches this call

[mxfactorial]

version

[email protected]

steps

1. open a typescript gitpod
2. select continue button to create a new workspace
3. wait for the editor to appear
4. cntrl c the init task to cancel or open a new terminal
5. rm -rf ./* ./.* to remove directory contents
6. npx sv create .
7. y to install [email protected]
8. choose:
   1. SvelteKit minimal
   2. Typescript syntax
   3. vitest
   4. npm
9. open vite.config.ts

observed

sveltekit() errors with 'No overload matches this call.'

[manuel3108]

The core problem here is that we are switching the type for the vite config from vite to vitest and it looks like vitest currently does not support plugins of type Promise<whatever>

// without vitest
import { defineConfig } from 'vite';

// with vitest
import { defineConfig } from "vitest/config";

Still trying to find any relevant issue. Currently only found this discussion in vite repo: vitejs/vite#8509

Look's like the vitest config has not been updated to match vite 6

[manuel3108]

Did not find anything meaningful, therefore created this issue: vitest-dev/vitest#7014

[AdrianGonz97]

The mismatch in types is because vitest reverted support for Vite 6 in 2.1.7.

Types can be fixed by reverting back to 2.1.6 or using pnpm.overrides to force vitest to use Vite 6. Though, I would just ignore the type error for now until they fix things on their end in a new release.

[dominikg]

see dominikg/vitest-example-svelte5#1 for a setup that works with vite@6, vitest@3 beta and latest sveltekit/svelte