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fix(dev): ensure vite-node doesn't load PostCSS config #13489

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Merged
merged 1 commit into from
Apr 29, 2025
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fix(dev): ensure vite-node doesn't load PostCSS config #13489

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5 changes: 5 additions & 0 deletions .changeset/little-cups-deliver.md
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Original file line number Diff line number Diff line change
@@ -0,0 +1,5 @@
---
"@react-router/dev": patch
---

When executing `react-router.config.ts` and `routes.ts` with `vite-node`, ensure that PostCSS config files are ignored
9 changes: 9 additions & 0 deletions packages/react-router-dev/vite/vite-node.ts
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Expand Up @@ -36,6 +36,15 @@ export async function createContext({
optimizeDeps: {
noDiscovery: true,
},
css: {
// This empty PostCSS config object prevents the PostCSS config file from
// being loaded. We don't need it in a React Router config context, and
// there's also an issue in Vite 5 when using a .ts PostCSS config file in
// an ESM project: https://github.com/vitejs/vite/issues/15869. Consumers
// can work around this in their own Vite config file, but they can't
// configure this internal usage of vite-node.
postcss: {},
},
configFile: false,
envFile: false,
plugins: [],
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