实现如图所是效果：

 

 

主从表显示代码：

 

<template>
  <el-table :data="tableData" stripe style="width: 100%"   max-height="500">
    <el-table-column type="expand">
      <template #default="props">
        <el-table :data="props.row.detailList"  stripe border  style="width: 50%">
          <el-table-column label="BookId" prop="bookid" />
          <el-table-column label="BookName" prop="bookname" />
        </el-table>
      </template>
    </el-table-column>
    <el-table-column label="Date" prop="date" />
    <el-table-column label="Name" prop="name" />
    <el-table-column label="City" prop="city" />
    <el-table-column label="Address" prop="address" />
    <el-table-column label="Operations">
      <template #default="scope">
        <el-button size="mini" @click="handleEdit(scope.$index, scope.row)"
          >Edit</el-button
        >
        <el-button
          size="mini"
          type="danger"
          @click="handleDelete(scope.$index, scope.row)"
          >Delete</el-button
        >
      </template>
    </el-table-column>
  </el-table>
</template>

<script lang="ts">
export default {
  data() {
    return {
      tableData: [
        {
          date: '2016-05-03',
          name: 'Tom',
          state: 'California',
          city: 'Los Angeles',
          address: 'No. 189, Grove St, Los Angeles',
          zip: 'CA 90036',
          detailList:[{
            bookid:1,
            bookname:"delphi"
          },
          {
            bookid:2,
            bookname:"java"
          }]
        },
        {
          date: '2016-05-02',
          name: 'Tom',
          state: 'California',
          city: 'Los Angeles',
          address: 'No. 189, Grove St, Los Angeles',
          zip: 'CA 90036',
          detailList:[{
            bookid:1,
            bookname:"delphi"
          },
          {
            bookid:2,
            bookname:"java"
          }]
        },
        {
          date: '2016-05-04',
          name: 'Tom',
          state: 'California',
          city: 'Los Angeles',
          address: 'No. 189, Grove St, Los Angeles',
          zip: 'CA 90036',
          detailList:[{
            bookid:1,
            bookname:"delphi"
          },
          {
            bookid:2,
            bookname:"java"
          }]
        },
        {
          date: '2016-05-01',
          name: 'Tom',
          state: 'California',
          city: 'Los Angeles',
          address: 'No. 189, Grove St, Los Angeles',
          zip: 'CA 90036',
          detailList:[{
            bookid:1,
            bookname:"delphi"
          },
          {
            bookid:2,
            bookname:"java"
          }]
        },
        {
          date: '2016-05-08',
          name: 'Tom',
          state: 'California',
          city: 'Los Angeles',
          address: 'No. 189, Grove St, Los Angeles',
          zip: 'CA 90036',
          detailList:[{
            bookid:1,
            bookname:"delphi"
          },
          {
            bookid:2,
            bookname:"java"
          }]
        },
        {
          date: '2016-05-06',
          name: 'Tom',
          state: 'California',
          city: 'Los Angeles',
          address: 'No. 189, Grove St, Los Angeles',
          zip: 'CA 90036',
          detailList:[{
            bookid:1,
            bookname:"delphi"
          },
          {
            bookid:2,
            bookname:"java"
          }]
        },
        {
          date: '2016-05-07',
          name: 'Tom',
          state: 'California',
          city: 'Los Angeles',
          address: 'No. 189, Grove St, Los Angeles',
          zip: 'CA 90036',
          detailList:[{
            bookid:1,
            bookname:"delphi"
          },
          {
            bookid:2,
            bookname:"java"
          }]
        },
      ],
    }
  },

  methods: {
    handleEdit(index, row) {
      console.log(index, row)
    },
    handleDelete(index, row) {
      console.log(index, row)
    },
  },
}
</script>