Vue Element-UI implements dynamic tables

Fix table header, sort by table header order

<template>
  <div class="app-container">
    <div class="filter-container">
      <el-checkbox-group v-model="checkboxVal">
        <el-checkbox label="apple">
          apple
        </el-checkbox>
        <el-checkbox label="banana">
          banana
        </el-checkbox>
        <el-checkbox label="orange">
          orange
        </el-checkbox>
      </el-checkbox-group>
    </div>

    <el-table :key="key" :data="tableData" border fit highlight-current-row style="width: 100%">
      <el-table-column prop="name" label="fruitName" width="180" />
      <el-table-column v-for="fruit in formThead" :key="fruit" :label="fruit">
        <template slot-scope="scope">
          {{ scope.row[fruit] }}
        </template>
      </el-table-column>
    </el-table>
  </div>
</template>

<script>
const defaultFormThead = ['apple'.'banana']

export default {
  data() {
    return {
      tableData: [{name: 'fruit-1'.apple: 'apple-10'.banana: 'banana-10'.orange: 'orange-10'
        },
        {
          name: 'fruit-2'.apple: 'apple-20'.banana: 'banana-20'.orange: 'orange-20'}].key: 1.// table key
      formTheadOptions: ['apple'.'banana'.'orange'].checkboxVal: defaultFormThead,
      formThead: defaultFormThead
    }
  },
  watch: {
    checkboxVal(valArr) {
      this.formThead = this.formTheadOptions.filter(i= > valArr.indexOf(i) >= 0)
      this.key = this.key + 1}}}</script>
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Do not fix the table header, sort by click order

<template>
  <div class="app-container">
    <div class="filter-container">
      <el-checkbox-group v-model="formThead">
        <el-checkbox label="apple">
          apple
        </el-checkbox>
        <el-checkbox label="banana">
          banana
        </el-checkbox>
        <el-checkbox label="orange">
          orange
        </el-checkbox>
      </el-checkbox-group>
    </div>

    <el-table :data="tableData" border fit highlight-current-row style="width: 100%">
      <el-table-column prop="name" label="fruitName" width="180" />
      <el-table-column v-for="fruit in formThead" :key="fruit" :label="fruit">
        <template slot-scope="scope">
          {{ scope.row[fruit] }}
        </template>
      </el-table-column>
    </el-table>
  </div>
</template>

<script>
export default {
  data() {
    return {
      tableData: [{name: 'fruit-1'.apple: 'apple-10'.banana: 'banana-10'.orange: 'orange-10'
        },
        {
          name: 'fruit-2'.apple: 'apple-20'.banana: 'banana-20'.orange: 'orange-20'}].formThead: ['apple'.'banana']}}}</script>
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