Vite 6 + React Router 7 - Type PluginOption[] is not assignable to type PluginOption

[stevensacks]

React Router 7 works fine with Vite 6, but Vitest has a TS error in the editor. Running vitest works, but TypeScript is complaining.

import react from '@vitejs/plugin-react';
import tsconfigPaths from 'vite-tsconfig-paths';
import {defineConfig} from 'vitest/config';

export default defineConfig({
  plugins: [react(), tsconfigPaths()],
            ~~~~~.   ~~~~~~~~~~~~~

TS2769: No overload matches this call.
The last overload gave the following error.
Type PluginOption[] is not assignable to type PluginOption

I tried deleting node_modules and package-lock.json and reinstalling, and also tried running dedupe, but it didn't fix it. Here's the npm ls vite.

├─┬ @react-router/[email protected]
│ ├─┬ [email protected]
│ │ └── [email protected]
│ └── [email protected] deduped invalid: "^5.1.0" from node_modules/@react-router/dev
├─┬ @storybook/[email protected]
│ ├─┬ @joshwooding/[email protected]
│ │ └── [email protected] deduped invalid: "^5.1.0" from node_modules/@react-router/dev
│ ├─┬ @storybook/[email protected]
│ │ └── [email protected] deduped invalid: "^5.1.0" from node_modules/@react-router/dev
│ └── [email protected] deduped invalid: "^5.1.0" from node_modules/@react-router/dev
├─┬ @vitejs/[email protected]
│ └── [email protected] deduped invalid: "^5.1.0" from node_modules/@react-router/dev
├─┬ [email protected]
│ └── [email protected] deduped invalid: "^5.1.0" from node_modules/@react-router/dev
├─┬ [email protected]
│ └── [email protected] deduped invalid: "^5.1.0" from node_modules/@react-router/dev
├── [email protected] invalid: "^5.1.0" from node_modules/@react-router/dev
└─┬ [email protected]
  ├─┬ @vitest/[email protected]
  │ └── [email protected] deduped invalid: "^5.1.0" from node_modules/@react-router/dev, "^5.0.0" from node_modules/@vitest/mocker
  ├─┬ [email protected]
  │ └── [email protected] deduped
  └── [email protected]

Any ideas how to resolve?

[hi-ogawa]

Vitest 2 doesn't allow Vite 6. You can try beta to use Vite 6 https://github.com/vitest-dev/vitest/releases/tag/v3.0.0-beta.2