vue3+vite使用element-plus问题

pnpm install element-plus -S

  <link rel="stylesheet" href="//unpkg.com/element-plus/dist/index.css" rel="external nofollow"  />
  <script src="//unpkg.com/vue@3"></script>
  <script src="//unpkg.com/element-plus"></script>

import 'element-plus/dist/index.css'
const app = createApp(App)
app.use(ElementPlus)

npm install -D unplugin-vue-components unplugin-auto-import

import { defineConfig } from 'vite'
import AutoImport from 'unplugin-auto-import/vite'
import Components from 'unplugin-vue-components/vite'
import { ElementPlusResolver } from 'unplugin-vue-components/resolvers'
export default defineConfig({
  // ...
  plugins: [
    // ...
    AutoImport({
      resolvers: [ElementPlusResolver()],
    }),
    Components({
      resolvers: [ElementPlusResolver()],
    }),
  ],
})

<el-button>登录</el-button>

import { ElMessage } from 'element-plus'
ElMessage('this is a message.')
ElMessage({
    message: 'Congrats, this is a success message.',
    type: 'success',
  })