表格的展开行功能

当行内容过多并且不想显示横向滚动条时，可以使用 Table 展开行功能

定义在表最后的展开功能

展开后的效果，显示更多内容

<template>
  <el-table class="m-expand-table" :data="tableData" style="width: 100%">
    <el-table-column label="ID" prop="id" />
    <el-table-column label="创建人" prop="name" />
    <el-table-column label="创建时间" prop="desc" />
    <el-table-column type="expand" width="80px">
      <template slot="header">更多信息</template>
      <template slot-scope="props">
        <el-form label-position="left" inline class="define-table-expand">
          <el-form-item label="ID">
            <span>{{ props.row.name }}</span>
          </el-form-item>
          <el-form-item label="所属店铺">
            <span>{{ props.row.shop }}</span>
          </el-form-item>
          <el-form-item label="商品 ID">
            <span>{{ props.row.id }}</span>
          </el-form-item>
          <el-form-item label="店铺 ID">
            <span>{{ props.row.shopId }}</span>
          </el-form-item>
          <el-form-item label="商品分类">
            <span>{{ props.row.category }}</span>
          </el-form-item>
          <el-form-item label="店铺地址">
            <span>{{ props.row.address }}</span>
          </el-form-item>
          <el-form-item label="商品描述">
            <span>{{ props.row.desc }}</span>
          </el-form-item>
        </el-form>
      </template>
    </el-table-column>
  </el-table>
</template>
<script>
export default {
  name: 'MExpandTable',
  data() {
    return {
      tableData: [
        {
          id: '12987122',
          name: '好滋好味鸡蛋仔',
          category: '江浙小吃、小吃零食',
          desc: '荷兰优质淡奶，奶香浓而不腻',
          address: '上海市普陀区真北路',
          shop: '王小虎夫妻店',
          shopId: '10333'
        },
        {
          id: '12987123',
          name: '好滋好味鸡蛋仔',
          category: '江浙小吃、小吃零食',
          desc: '荷兰优质淡奶，奶香浓而不腻',
          address: '上海市普陀区真北路',
          shop: '王小虎夫妻店',
          shopId: '10333'
        },
        {
          id: '12987125',
          name: '好滋好味鸡蛋仔',
          category: '江浙小吃、小吃零食',
          desc: '荷兰优质淡奶，奶香浓而不腻',
          address: '上海市普陀区真北路',
          shop: '王小虎夫妻店',
          shopId: '10333'
        },
        {
          id: '12987126',
          name: '好滋好味鸡蛋仔',
          category: '江浙小吃、小吃零食',
          desc: '荷兰优质淡奶，奶香浓而不腻',
          address: '上海市普陀区真北路',
          shop: '王小虎夫妻店',
          shopId: '10333'
        }
      ]
    }
  },
  mounted() {
    // 监听数据行中"查看"文字的点击事件
    this.$nextTick(() => {
      // 选择所有数据行的展开列单元格
      const cells = document.querySelectorAll('.el-table__body .el-table__expand-column .cell')
      cells.forEach(cell => {
        // 给每个单元格添加点击事件
        cell.addEventListener('click', (e) => {
          // 找到当前单元格内的展开图标
          const expandIcon = cell.querySelector('.el-table__expand-icon')
          if (expandIcon) {
            // 触发图标的点击事件，实现与点击箭头相同的效果
            expandIcon.click()
            // 阻止事件冒泡到表格其他区域
            e.stopPropagation()
          }
        })
      })
    })
  }
}
</script>
<style>
.define-table-expand {
  font-size: 0;
}

.define-table-expand label {
  width: 90px;
  color: #99a9bf;
}

.define-table-expand .el-form-item {
  margin-right: 0;
  margin-bottom: 0;
  width: 50%;
}

 /* 关键：只对数据行（el-table__body内）的展开列添加伪类 */
.m-expand-table .el-table__body .el-table__expand-column .cell {
  position: relative;
  padding-left: 40px !important;
  width: auto !important;
  min-width: 60px;
}

/* 数据行的伪类显示"查看"文字 */
.m-expand-table .el-table__body .el-table__expand-column .cell:before {
  content: '查看';
  position: absolute;
  left: 15px;
  top: 50%;
  transform: translateY(-50%);
  color: #2354E6;
  font-size: 14px;
  font-weight: 500;
}

/* 表头行（el-table__header内）的展开列不添加任何样式 */
.m-expand-table .el-table__header .el-table__expand-column .cell {
  padding: 0 !important; /* 清除表头的内边距，避免空白 */
}

.m-expand-table .el-table__expand-icon {
  color: #2354E6 !important;
}
</style>