el-popover全屏不显示(bug记录)

我做了一个el-table全屏展示的功能, 然后里面的el-popover在全屏后无法展示, 刚开始以为是写唯一的key或者ref, 发现写了也不行, 后来以为要写’:append-to-body=“false”, 最后发现是我的外层的层级写得太高了; position: fixed; z-index: 9999;

<div class="box"> 
	<el-table :data="tableData">
	 <el-table-column
      label="Name"
      prop="name">
      <template slot="header" slot-scope="scope">
        <span>Name</span>
        <el-popover trigger="hover" content="内容">
          <el-button slot="reference">hit</el-button>
        </el-popover>
      </template>
    </el-table-column>
    </el-table>
</div>