diff --git a/examples/react-server/src/features/utils/plugin.ts b/examples/react-server/src/features/utils/plugin.ts
index 22bed0d4..1c7b00ad 100644
--- a/examples/react-server/src/features/utils/plugin.ts
+++ b/examples/react-server/src/features/utils/plugin.ts
@@ -36,10 +36,6 @@ export function vitePluginSilenceDirectiveBuildWarning(): Plugin {
   };
 }
 
-//
-// plugin utils
-//
-
 export function createVirtualPlugin(name: string, load: Plugin["load"]) {
   name = "virtual:" + name;
   return {
@@ -111,16 +107,26 @@ function replaceCode(
 // fs utils
 //
 
-export async function traverseFiles(
+export async function collectFiles(baseDir: string) {
+  const files: string[] = [];
+  await traverseFiles(baseDir, async (filepath, e) => {
+    if (e.isFile()) {
+      files.push(filepath);
+    }
+    return e.isDirectory();
+  });
+  return files;
+}
+
+async function traverseFiles(
   dir: string,
-  callback: (filepath: string, e: fs.Dirent) => void,
+  onEntry: (filepath: string, e: fs.Dirent) => Promise<boolean>,
 ) {
   const entries = await fs.promises.readdir(dir, { withFileTypes: true });
   for (const e of entries) {
     const filepath = path.join(e.path, e.name);
-    callback(filepath, e);
-    if (e.isDirectory()) {
-      await traverseFiles(filepath, callback);
+    if (await onEntry(filepath, e)) {
+      await traverseFiles(filepath, onEntry);
     }
   }
 }
diff --git a/examples/react-server/vite.config.ts b/examples/react-server/vite.config.ts
index fd0cab14..dfb9e67a 100644
--- a/examples/react-server/vite.config.ts
+++ b/examples/react-server/vite.config.ts
@@ -10,9 +10,9 @@ import { __global } from "./src/global";
 import react from "@vitejs/plugin-react";
 import { vitePluginSsrMiddleware } from "../react-ssr/vite.config";
 import {
+  collectFiles,
   createVirtualPlugin,
   parseExports,
-  traverseFiles,
   vitePluginSilenceDirectiveBuildWarning,
 } from "./src/features/utils/plugin";
 import fs from "node:fs";
@@ -263,12 +263,7 @@ function vitePluginServerAction(): PluginOption {
     async function () {
       tinyassert(this.environment?.name === "react-server");
       tinyassert(this.environment.mode === "build");
-      const files: string[] = [];
-      await traverseFiles(path.resolve("./src"), (file, e) => {
-        if (e.isFile()) {
-          files.push(file);
-        }
-      });
+      const files = await collectFiles(path.resolve("./src"));
       const ids: string[] = [];
       for (const file of files) {
         const code = await fs.promises.readFile(file, "utf-8");