♻️: 重构 renderer

package/document-component/src/document/zh-CN/components/dropdown.md

@@ -13,6 +13,7 @@
 ::: demo
 
 <template>
+<lay-space>
   <lay-dropdown updateAtScroll>
     <lay-button type="primary">下拉菜单</lay-button>
     <template #content>
@@ -23,6 +24,17 @@
         </lay-dropdown-menu>
     </template>
   </lay-dropdown>
+  <lay-dropdown updateAtScroll popupContainer=".layui-body">
+    <lay-button type="primary">下拉菜单</lay-button>
+    <template #content>
+        <lay-dropdown-menu>
+          <lay-dropdown-menu-item>选项一</lay-dropdown-menu-item>
+          <lay-dropdown-menu-item>选项二</lay-dropdown-menu-item>
+          <lay-dropdown-menu-item>选项三</lay-dropdown-menu-item>
+        </lay-dropdown-menu>
+    </template>
+  </lay-dropdown>
+</lay-space>
 </template>
 
 <script>