ElementUI表格中添加表头图标悬浮提示

<el-table-column    label="操作"    fixed="right"    :render-header="tableAction"    width="120">    <!--scope 即为 userList  scope.row即为当前行数据 -->    <template slot-scope="scope">        <el-button @click="editCar(scope.row)" type="primary" icon="el-icon-edit" size="small" circle></el-button>        <el-button @click="delCar(scope.row.carId)" type="danger"                   icon="el-icon-delete" circle size="small"></el-button>    </template></el-table-column>

 //表格操作提示 tableAction() {     return this.$createElement('HelpHint', {         props: {             content: '编辑车辆 / 删除车辆'         }     }, '操作'); },

import HelpHint from ‘~/components/HelpHint/HelpHint.vue';

<template>  <span>    <span style="margin-right: 8px"><slot></slot></span>    <el-tooltip :content="content" :placement="placement">      <i class="el-icon-question" style="cursor: pointer;"></i>    </el-tooltip>  </span></template><script>  export default {    name: 'HelpHint',    props: {      placement: {        default: 'top'      },      content: String,    },    data() {      return {}    },  }</script>