diff --git a/.dumirc.ts b/.dumirc.ts
index 9e872696..2d8caaab 100644
--- a/.dumirc.ts
+++ b/.dumirc.ts
@@ -1,5 +1,6 @@
 // more config: https://d.umijs.org/config
 import { defineConfig } from 'dumi';
+import path from 'path';
 
 const basePath = process.env.GITHUB_ACTIONS ? '/util/' : '/';
 const publicPath = process.env.GITHUB_ACTIONS ? '/util/' : '/';
@@ -14,4 +15,7 @@ export default defineConfig({
   exportStatic: {},
   base: basePath,
   publicPath,
+  alias: {
+    'rc-util/es': path.resolve(__dirname, 'src'),
+  },
 });
diff --git a/docs/examples/focus.tsx b/docs/examples/focus.tsx
index 7e7ae662..1330e338 100644
--- a/docs/examples/focus.tsx
+++ b/docs/examples/focus.tsx
@@ -1,6 +1,5 @@
 import React, { useRef } from 'react';
 import { useLockFocus } from '../../src/Dom/focus';
-import './focus.css';
 
 export default function FocusDemo() {
   const containerRef = useRef<HTMLDivElement>(null);
diff --git a/tsconfig.json b/tsconfig.json
index 40a6277b..7ab37155 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -10,7 +10,7 @@
     "paths": {
       "@/*": ["src/*"],
       "@@/*": ["src/.dumi/*"],
-      "rc-util": ["src/index.tsx"],
+      "rc-util": ["src/index.ts"],
       "rc-util/es/*": ["src/*"]
     }
   }