fix!: remove resolve.dedupe (#586)

Author: sapphi-red

packages/plugin-react/CHANGELOG.md

@@ -2,6 +2,12 @@
 
 ## Unreleased
 
+### `react` and `react-dom` is no longer added to [`resolve.dedupe`](https://vite.dev/config/#resolve-dedupe) automatically
+
+Adding values to `resolve.dedupe` forces Vite to resolve them differently from how Node.js does, which can be confusing and may not be expected. This plugin no longer adds `react` and `react-dom` to `resolve.dedupe` automatically.
+
+If you encounter errors after upgrading, check your package.json for version mismatches in `dependencies` or `devDependencies`, as well as your package manager’s configuration. If you prefer the previous behavior, you can manually add `react` and `react-dom` to `resolve.dedupe`.
+
 ### Remove old `babel-plugin-react-compiler` support that requires `runtimeModule` option
 
 `runtimeModule` option is no longer needed in newer `babel-plugin-react-compiler` versions. Make sure to use a newer version of `babel-plugin-react-compiler` that supports `target` option.

packages/plugin-react/src/index.ts

@@ -358,9 +358,6 @@ export default function viteReact(opts: Options = {}): Plugin[] {
       optimizeDeps: {
         include: dependencies,
       },
-      resolve: {
-        dedupe: ['react', 'react-dom'],
-      },
     }),
     resolveId: {
       filter: { id: exactRegex(runtimePublicPath) },