element-ui的table树状图嵌套有问题, 缩进不正常, 该怎么解决呢 ?

归来仍少年
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<template>
  <div>
    <el-table :data="tableData" style="width: 100%;margin-bottom: 20px;" row-key="id" border default-expand-all
      :tree-props="{ children: 'children', hasChildren: 'hasChildren' }">
      <el-table-column prop="date" label="日期" sortable type="expand" width="180">
        <el-table :data="tableData1" style="width: 100%" row-key="id" border lazy :load="load"
          :tree-props="{ children: 'children', hasChildren: 'hasChildren' }">
          <el-table-column prop="date" label="日期" width="180" type="expand">
            <el-table :data="tableData1" style="width: 100%" row-key="id" border lazy :load="load"
              :tree-props="{ children: 'children', hasChildren: 'hasChildren' }">
              <el-table-column prop="date" label="日期" width="180">
              </el-table-column>
              <el-table-column prop="name" label="姓名" width="180">
              </el-table-column>
              <el-table-column prop="address" label="地址">
              </el-table-column>
            </el-table>
          </el-table-column>
          <el-table-column prop="name" label="姓名" width="180">
          </el-table-column>
          <el-table-column prop="address" label="地址">
          </el-table-column>
        </el-table>
      </el-table-column>
      <el-table-column prop="name" label="姓名" sortable width="180">
      </el-table-column>
      <el-table-column prop="address" label="地址">
      </el-table-column>
    </el-table>
  </div>
</template>
<script>
export default {
  data() {
    return {
      tableData: [{
        id: 1,
        date: '2016-05-02',
        name: '王小虎',
        address: '上海市普陀区金沙江路 1518 弄'
      }, {
        id: 2,
        date: '2016-05-04',
        name: '王小虎',
        address: '上海市普陀区金沙江路 1517 弄'
      }, {
        id: 3,
        date: '2016-05-01',
        name: '王小虎',
        address: '上海市普陀区金沙江路 1519 弄',
        children: [{
          id: 31,
          date: '2016-05-01',
          name: '王小虎',
          address: '上海市普陀区金沙江路 1519 弄'
        }, {
          id: 32,
          date: '2016-05-01',
          name: '王小虎',
          address: '上海市普陀区金沙江路 1519 弄'
        }]
      }, {
        id: 4,
        date: '2016-05-03',
        name: '王小虎',
        address: '上海市普陀区金沙江路 1516 弄'
      }],
      tableData1: [{
        id: 1,
        date: '2016-05-02',
        name: '王小虎',
        address: '上海市普陀区金沙江路 1518 弄'
      }, {
        id: 2,
        date: '2016-05-04',
        name: '王小虎',
        address: '上海市普陀区金沙江路 1517 弄'
      }, {
        id: 3,
        date: '2016-05-01',
        name: '王小虎',
        address: '上海市普陀区金沙江路 1519 弄',
        hasChildren: true
      }, {
        id: 4,
        date: '2016-05-03',
        name: '王小虎',
        address: '上海市普陀区金沙江路 1516 弄'
      }]
    }
  },
  methods: {
    load(tree, treeNode, resolve) {
      setTimeout(() => {
        resolve([
          {
            id: 31,
            date: '2016-05-01',
            name: '王小虎',
            address: '上海市普陀区金沙江路 1519 弄'
          }, {
            id: 32,
            date: '2016-05-01',
            name: '王小虎',
            address: '上海市普陀区金沙江路 1519 弄'
          }
        ])
      }, 1000)
    }
  },
}
</script>

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