记录：element-plus el-dropdown有黑框，下拉不显示

<el-dropdown>
     <span style="outline: none;">下拉菜单</span>
     <template #dropdown>
         <el-dropdown-menu>
             <el-dropdown-item>Action 1</el-dropdown-item>
             <el-dropdown-item>Action 2</el-dropdown-item>
         </el-dropdown-menu>
     </template>
 </el-dropdown>

去掉黑框添加样式outline: none

下拉不显示，在el-dropdown-menu外层添加<template #dropdown>即可