diff --git a/bun.lockb b/bun.lockb
index d7be6da..456dbfa 100644
Binary files a/bun.lockb and b/bun.lockb differ
diff --git a/components.d.ts b/components.d.ts
new file mode 100644
index 0000000..eb6c0af
--- /dev/null
+++ b/components.d.ts
@@ -0,0 +1,17 @@
+/* eslint-disable */
+// @ts-nocheck
+// Generated by unplugin-vue-components
+// Read more: https://github.com/vuejs/core/pull/3399
+// biome-ignore lint: disable
+export {}
+
+/* prettier-ignore */
+declare module 'vue' {
+  export interface GlobalComponents {
+    ClientOnly: typeof import('./src/components/ClientOnly.tsx')['default']
+    CookieDemo: typeof import('./src/components/CookieDemo.vue')['default']
+    DataFetch: typeof import('./src/components/DataFetch.vue')['default']
+    HelloWorld: typeof import('./src/components/HelloWorld.vue')['default']
+    SimpleTest: typeof import('./src/components/SimpleTest.vue')['default']
+  }
+}
diff --git a/package.json b/package.json
index 71ea955..abf2fec 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,9 @@
 {
   "name": "koa-ssr",
   "type": "module",
+  "workspaces": [
+    "packages/*"
+  ],
   "scripts": {
     "dev": "bun run --watch server.ts",
     "build": "npm run build:client && npm run build:server",
@@ -14,6 +17,7 @@
     "@types/koa": "^3.0.0",
     "@types/koa-send": "^4.1.6",
     "cross-env": "^10.1.0",
+    "unplugin-vue-components": "^29.1.0",
     "vue-tsc": "^3.1.0"
   },
   "peerDependencies": {
@@ -27,4 +31,4 @@
     "vite": "^7.1.7",
     "vue": "^3.5.22"
   }
-}
\ No newline at end of file
+}
diff --git a/src/App.vue b/src/App.vue
index 6d00c7e..8433d2a 100644
--- a/src/App.vue
+++ b/src/App.vue
@@ -16,6 +16,9 @@ import SimpleTest from './components/SimpleTest.vue';
       <img src="./assets/vue.svg" class="logo vue" alt="Vue logo" />
     </a>
   </div>
+  <ClientOnly>
+    <div>Only For Client</div>
+  </ClientOnly>
   <HelloWorld msg="Vite + Vue" />
   <CookieDemo />
   <SimpleTest />
diff --git a/src/components/ClientOnly.tsx b/src/components/ClientOnly.tsx
new file mode 100644
index 0000000..fa64ae8
--- /dev/null
+++ b/src/components/ClientOnly.tsx
@@ -0,0 +1,43 @@
+import { cloneVNode, createElementBlock, defineComponent, getCurrentInstance, h, InjectionKey, onMounted, provide, shallowRef, SlotsType, VNode } from "vue";
+
+export const clientOnlySymbol: InjectionKey<boolean> = Symbol.for('nuxt:client-only')
+
+export default defineComponent({
+    name: "ClientOnly",
+    inheritAttrs: false,
+    props: ['fallback', 'placeholder', 'placeholderTag', 'fallbackTag'],
+    ...(import.meta.env.DEV && {
+        slots: Object as SlotsType<{
+            default?: () => VNode[]
+
+            /**
+             * Specify a content to be rendered on the server and displayed until `<ClientOnly>` is mounted in the browser.
+             */
+            fallback?: () => VNode[]
+            placeholder?: () => VNode[]
+        }>,
+    }),
+    setup(props, { slots, attrs }) {
+        const mounted = shallowRef(false)
+        onMounted(() => { mounted.value = true })
+        const vm = getCurrentInstance()
+        if (vm) {
+            vm._nuxtClientOnly = true
+        }
+        provide(clientOnlySymbol, true)
+        return () => {
+            if (mounted.value) {
+                const vnodes = slots.default?.()
+                if (vnodes && vnodes.length === 1) {
+                    return [cloneVNode(vnodes[0]!, attrs)]
+                }
+                return vnodes
+            }
+            const slot = slots.fallback || slots.placeholder
+            if (slot) { return h(slot) }
+            const fallbackStr = props.fallback || props.placeholder || ''
+            const fallbackTag = props.fallbackTag || props.placeholderTag || 'span'
+            return createElementBlock(fallbackTag, attrs, fallbackStr)
+        }
+    }
+})
diff --git a/src/components/CookieDemo.vue b/src/components/CookieDemo.vue
index 8d5ed24..69320a6 100644
--- a/src/components/CookieDemo.vue
+++ b/src/components/CookieDemo.vue
@@ -3,6 +3,9 @@
     <div class="btns">
       <button @click="setCookie">设置 cookie</button>
       <button @click="removeCookie">删除 cookie</button>
+      <ClientOnly>
+        <div>fuck ypu</div>
+      </ClientOnly>
     </div>
     <small>服务端首屏会尝试设置缺失的 HttpOnly cookie，客户端不可读。</small>
   </div>
@@ -10,7 +13,8 @@
 </template>
 
 <script setup lang="ts">
- import { onMounted, onServerPrefetch } from 'vue'
+import ClientOnly from './ClientOnly'
+import { onMounted, onServerPrefetch } from 'vue'
 import { useCookie } from '../compose/useCookie'
 
 const cookie = useCookie('demo_token', { path: '/', sameSite: 'lax' })
diff --git a/src/components/DataFetch.vue b/src/components/DataFetch.vue
index ead57d0..9e686f0 100644
--- a/src/components/DataFetch.vue
+++ b/src/components/DataFetch.vue
@@ -26,7 +26,7 @@
 </template>
 
 <script setup lang="ts">
-import { ref, onMounted } from 'vue'
+import { ref, onMounted, watchEffect } from 'vue'
 import { useFetch } from '../compose/useFetch'
 
 // 调试状态
@@ -46,13 +46,18 @@ const { data, error, pending, refresh } = useFetch(
       id: userData.id,
       name: userData.name,
       email: userData.email,
-      website: userData.website
+      website: userData.website,
     }),
     onError: (err) => {
       console.error('Fetch error:', err)
     }
   }
 )
+watchEffect(() => {
+  if (!pending.value) {
+    console.log('Fetched user data:', data.value?.email)
+  }
+})
 </script>
 
 <style scoped>
diff --git a/src/compose/useFetch.ts b/src/compose/useFetch.ts
index 3b5320b..e976b0c 100644
--- a/src/compose/useFetch.ts
+++ b/src/compose/useFetch.ts
@@ -9,11 +9,11 @@ const globalCache = new Map<string, any>()
 // SSR 上下文类型从 ssrContext.ts 引入
 
 // useFetch 的配置选项
-interface UseFetchOptions {
+interface UseFetchOptions<T = any> {
   key?: string
   server?: boolean
   default?: () => any
-  transform?: (data: any) => any
+  transform?: (data: any) => T
   onError?: (error: Error) => void
 }
 
@@ -32,7 +32,7 @@ interface UseFetchReturn<T> {
  */
 export function useFetch<T = any>(
   url: string | (() => string) | (() => Promise<string>),
-  options: UseFetchOptions = {}
+  options: UseFetchOptions<T> = {}
 ): UseFetchReturn<T> {
   const {
     key,
diff --git a/src/vue.d.ts b/src/vue.d.ts
new file mode 100644
index 0000000..de7be77
--- /dev/null
+++ b/src/vue.d.ts
@@ -0,0 +1,10 @@
+export { }
+
+declare module 'vue' {
+  export interface ComponentCustomProperties {
+    $ssrContext?: Record<string, any>
+  }
+  export interface ComponentInternalInstance {
+    _nuxtClientOnly?: boolean
+  }
+}
\ No newline at end of file
diff --git a/tsconfig.json b/tsconfig.json
index 8a4664f..ebbb12c 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -21,6 +21,6 @@
     "noFallthroughCasesInSwitch": true,
     "noUncheckedSideEffectImports": true
   },
-  "include": ["src/**/*.ts", "src/**/*.tsx", "src/**/*.vue"],
+  "include": ["src/**/*.ts", "src/**/*.tsx", "src/**/*.vue", "components.d.ts"],
   "references": [{ "path": "./tsconfig.node.json" }]
 }
diff --git a/vite.config.ts b/vite.config.ts
index 981be2b..348d0dd 100644
--- a/vite.config.ts
+++ b/vite.config.ts
@@ -1,8 +1,13 @@
 import { defineConfig } from 'vite'
 import vue from '@vitejs/plugin-vue'
+import Components from 'unplugin-vue-components/vite'
 
 // https://vite.dev/config/
 export default defineConfig({
   base: './',
-  plugins: [vue()],
+  plugins: [
+    vue(),
+    Components({ dts: true,
+  extensions: ['vue', 'tsx'], })
+  ],
 })