实现 vxe-table 分组列头折叠列功能非常简单，只需改变列的 visible 就可以实现

vxetable.cn

通过修改列的 visible 属性来精确控制列的显示隐藏

<template>
  <div>
    <vxe-table
      border
      height="400"
      :data="tableData">
      <vxe-column type="checkbox" width="60">vxe-column>
      <vxe-colgroup field="g1" title="分组1">
        <template #header="{ column }">
          <vxe-button mode="text" :icon="foldMaps.g1 ? 'vxe-icon-square-minus' : 'vxe-icon-square-plus'" @click="collapsable('g1')">vxe-button>
          <span>{{ column.title }}span>
        template>

        <vxe-column field="name" title="Name" width="200">vxe-column>
        <vxe-column field="role" title="Role" :visible="foldMaps.g1" width="200">vxe-column>
        <vxe-column field="sex" title="Sex" :visible="foldMaps.g1" width="200">vxe-column>
      vxe-colgroup>
      <vxe-colgroup field="g2" title="分组2">
        <template #header="{ column }">
          <vxe-button mode="text" :icon="foldMaps.g2 ? 'vxe-icon-square-minus' : 'vxe-icon-square-plus'" @click="collapsable('g2')">vxe-button>
          <span>{{ column.title }}span>
        template>

        <vxe-column field="age" title="Age" width="200">vxe-column>
        <vxe-column field="rate" title="Rate" :visible="foldMaps.g2" width="200">vxe-column>
        <vxe-column field="address" title="Address" :visible="foldMaps.g2" width="200">vxe-column>
      vxe-colgroup>
    vxe-table>
  div>
template>

<script setup>
import { reactive, ref } from 'vue'

const foldMaps = reactive({
  g1: true,
  g2: true
})

const tableData = ref([
  { id: 10001, name: 'Test1', role: 'Develop', sex: 'Man', age: 28, address: 'test abc' },
  { id: 10002, name: 'Test2', role: 'Test', sex: 'Women', age: 22, address: 'Guangzhou' },
  { id: 10003, name: 'Test3', role: 'PM', sex: 'Man', age: 32, address: 'Shanghai' },
  { id: 10004, name: 'Test4', role: 'Designer', sex: 'Women', age: 23, address: 'test abc' },
  { id: 10005, name: 'Test5', role: 'Develop', sex: 'Women', age: 30, address: 'Shanghai' },
  { id: 10006, name: 'Test6', role: 'Designer', sex: 'Women', age: 21, address: 'test abc' },
  { id: 10007, name: 'Test7', role: 'Test', sex: 'Man', age: 29, address: 'test abc' },
  { id: 10008, name: 'Test8', role: 'Develop', sex: 'Man', age: 35, address: 'test abc' }
])

const collapsable = (key) => {
  foldMaps[key] = !foldMaps[key]
}
script>

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