element-ui table组件如何使用render属性的实现

const columns = [
 {
 title: 'Name',
 dataIndex: 'name',
 render: (text, row, index) => {
  if (index < 4) {
  return <a>{text}</a>;
  }
  return {
  children: <a>{text}</a>,
  props: {
   colSpan: 5,
  },
  };
 },
 }]
 const const data = [
 {
 key: '1',
 name: 'John Brown',
 age: 32,
 tel: '0571-22098909',
 phone: 18889898989,
 address: 'New York No. 1 Lake Park',
 }]
ReactDOM.render(<Table columns={columns} dataSource={data} bordered />, mountNode);

<template>
 <el-table :data="tableList" style="width:500px">
  <template v-for="item in propList">
  <slot :content="item">
   <el-table-column :key="item.id" :prop="item.prop" :label="item.label"></el-table-column>
  </slot>
  </template>
 </el-table>
</template>
<script>
 export default {
  props:{
   propList:{
   type:Array,
   default:()=>[]
   },
   tableList:{
   type:Array,
   default:()=>[]
   },
  }
 }
</script>

<slot-item :propList="propList" :tableList="tableList">
 <template slot-scope="{content}" v-if="content.render">
  <el-table-column :label="content.label">
   <template slot-scope="{$index,row}">
    <div v-html="content.render(row)"></div>
   </template>
  </el-table-column>
 </template>
</slot-item>
 export default {
  components:{
   SlotItem
  },
  data () {
   return { 
    propList:[
     {label:'姓名',prop:'name',id:1},
     {label:'图片',prop:'pic',id:2,render:({pic})=>{
      return `<img style="width:30px;height:30px" src='${pic}' />`
     }},
     {label:'操作',prop:'operate',id:3,render:({text})=>{
      return `<div style="color:#999">${text}</div>`
     }},
    ],
    tableList:[
     {name:'章三',pic:'https://zh-static-files.oss-cn-hangzhou.aliyuncs.com//karazhan/content/poster/2019/11/16e30c192f6.png',text:'新增'},
     {name:'里斯',pic:'https://zh-static-files.oss-cn-hangzhou.aliyuncs.com//karazhan/content/poster/2019/11/16e30c2797e.png',text:'删除'},
     {name:'网舞',pic:'https://zh-static-files.oss-cn-hangzhou.aliyuncs.com//karazhan/content/poster/2019/11/16e30c33144.png',text:'跳转'},
    ]
   }
  }
 }
</script>