我的帐号页面设置 unique-opened 属性, 只保持一个子菜单的展开

src/views/my/My.vue

@@ -35,6 +35,7 @@
           router
           class="el-menu-vertical-demo"
           :collapse="isCollapse"
+          :unique-opened="true"
           @open="handleOpen"
           @close="handleClose"
         >