changeset

.changeset/green-baboons-punch.md

@@ -0,0 +1,30 @@
+---
+"@remix-run/dev": patch
+---
+
+Vite: rely on Vite plugin ordering
+
+**This is a breaking change for projects using the unstable Vite plugin.**
+
+The Remix plugin expects to process JavaScript or TypeScript files, so any transpilation from other languages must be done first.
+For example, that means putting the MDX plugin _before_ the Remix plugin:
+
+```diff
+  import mdx from "@mdx-js/rollup";
+  import { unstable_vitePlugin as remix } from "@remix-run/dev";
+  import { defineConfig } from "vite";
+
+  export default defineConfig({
+    plugins: [
++     mdx(),
+      remix()
+-     mdx(),
+    ],
+  });
+```
+
+Previously, the Remix plugin abused `enforce: "post"` from Vite's plugin API to ensure that it ran last.
+However, this caused other unforeseen issues.
+Instead, we now rely on standard Vite semantics for plugin ordering.
+
+The official [Vite React SWC plugin](https://github.com/vitejs/vite-plugin-react-swc/blob/main/src/index.ts#L97-L116) also relies on plugin ordering for MDX.