效果

程式碼

<template>
  <div>
    <el-table :data="tableData" style="width: 100%">
      <el-table-column 
        v-for="col in cols"
        :key="col.label"
        :prop="col.prop" :label="col.label" >
      </el-table-column>
    </el-table>
    
    <el-button raw-type="button" @click="addCol">
      新增一列
    </el-button>

  </div>
</template>

<script>
export default {
  name: "marquee-up",

  data() {
    return {
      tableData: [{
        date: '2016-05-02',
        name: '王小虎',
        address: '上海市普陀區金沙江路 1518 弄'
      }, {
        date: '2016-05-04',
        name: '王小虎',
        address: '上海市普陀區金沙江路 1517 弄'
      }, {
        date: '2016-05-01',
        name: '王小虎',
        address: '上海市普陀區金沙江路 1519 弄'
      }, {
        date: '2016-05-03',
        name: '王小虎',
        address: '上海市普陀區金沙江路 1516 弄'
      }],
      cols: [
        {prop: 'date', label: '日期'},
        {prop: 'name', label: '姓名'},
      ]
    }
  },
  methods: {
    addCol(){
        this.cols.push({prop: 'address', label: '地址'})
    },
  },
  components:{
  },
  destroyed() {
    
  }
};

</script>

<style lang="scss" scoped>

</style>