antd a-table想要实现如以下效果，有子级就显示展开图标，没有就不显示图标：

话不多说，直接上代码：

<template>
  <a-table :columns="columns" :data-source="dataSource">
    <template #bodyCell="{ column }">
      <template v-if="column.key === 'operation'">
        <a>Publish</a>
      </template>
    </template>

    <template #expandIcon="{ expanded, onExpand, record }">
      <button @click="(e) => onExpand(record, e)" v-if="record && record.more.length"
        :class="`ant-table-row-expand-icon ${expanded ? 'ant-table-row-expand-icon-expanded' : 'ant-table-row-expand-icon-collapsed'}`"></button>
    </template>

    <template #expandedRowRender="{ record }">
      <a-table :columns="innerColumns" :data-source="record.more" :pagination="false">
        <template #bodyCell="{ column }">

          <template v-if="column.key === 'state'">
            <span>
              <a-badge status="success" />
              Finished
            </span>
          </template>

        </template>
      </a-table>
    </template>
  </a-table>
</template>
<script setup>

const columns = [
  { title: 'Name', dataIndex: 'name', key: 'name' },
  { title: 'Version', dataIndex: 'version', key: 'version' },
  { title: 'Upgraded', dataIndex: 'upgradeNum', key: 'upgradeNum' },
  { title: 'Date', dataIndex: 'createdAt', key: 'createdAt' },
  { title: 'Action', key: 'operation' },
];



const dataSource = [{
  key: 0,
  name: "Screem 1",
  version: "10.3.4.5654",
  upgradeNum: 500,
  createdAt: "2014-12-24 23:12:00",
  more: [
    {
      key: 6,
      date: "2014-12-24 23:12:00",
      name: "This is production name 1",
      upgradeNum: "Upgraded: 56"
    }, {
      key: 7,
      date: "2014-12-24 23:12:00",
      name: "This is production name 2",
      upgradeNum: "Upgraded: 56"
    }, {
      key: 8,
      date: "2014-12-24 23:12:00",
      name: "This is production name 3",
      upgradeNum: "Upgraded: 56"
    }
  ]
}, {
  key: 1,
  name: "Screem 2",
  version: "10.3.4.5654",
  upgradeNum: 700,
  createdAt: "2014-12-24 23:12:00",
  more: []
}, {
  key: 2,
  name: "Screem 3",
  version: "10.3.4.5654",
  upgradeNum: 300,
  createdAt: "2014-12-24 23:12:00",
  more: [
    {
      key: 9,
      date: "2014-12-24 23:12:00",
      name: "This is production name 1",
      upgradeNum: "Upgraded: 56"
    }
  ]
}];


const innerColumns = [
  { title: 'Date', dataIndex: 'date', key: 'date' },
  { title: 'Name', dataIndex: 'name', key: 'name' },
  { title: 'Upgrade Status', dataIndex: 'upgradeNum', key: 'upgradeNum' },
];


</script>

关键在于#expandIcon设置自定义图标，效果跟默认的效果一毛一样。

要注意：

我使用的是antd4，所以图标的类名是

ant-table-row-expand-icon-expanded、ant-table-row-expand-icon-collapsed。

大家如果用的版本不一样，可以控制台看下它默认渲染的图标类名是什么，直接复制过来替换掉就可以了，完美！

    <template #expandIcon="{ expanded, onExpand, record }">
      <button @click="(e) => onExpand(record, e)" v-if="record && record.more.length"
        :class="`ant-table-row-expand-icon ${expanded ? 'ant-table-row-expand-icon-expanded' : 'ant-table-row-expand-icon-collapsed'}`"></button>
    </template>