element ui 表格合并单元格

先上效果图：

再上代码：

<template>
  <div>
    
    <el-table
      :data="tableData6"
      :span-method="objectSpanMethod"
      border
      style="width: 100%; margin-top: 20px">
      <el-table-column
        prop="id"
        label="ID"
        width="180">
      </el-table-column>
      <el-table-column
        prop="name"
        label="姓名">
      </el-table-column>
      <el-table-column
        prop="amount1"
        label="数值 1（元）">
      </el-table-column>
      <el-table-column
        prop="amount2"
        label="数值 2（元）">
      </el-table-column>
      <el-table-column
        prop="amount3"
        label="数值 3（元）">
      </el-table-column>
    </el-table>
  </div>
</template>

<script>
export default {
  data() {
    return {
      tableData6: [
        {
          id: '12987122',
          name: '王小虎',
          amount1: '234',
          amount2: '3.2',
          amount3: 10
        },
        {
          id: '12987122',
          name: '王小虎',
          amount1: '165',
          amount2: '4.43',
          amount3: 12
        },
        {
          id: '12987122',
          name: '王小虎',
          amount1: '324',
          amount2: '1.9',
          amount3: 9
        },
        {
          id: '12987125',
          name: '王小虎',
          amount1: '621',
          amount2: '2.2',
          amount3: 17
        },
        {
          id: '12987126',
          name: '王小虎',
          amount1: '539',
          amount2: '4.1',
          amount3: 15
        }
      ],
      column_row_offset: {
        id: [3, 1, 1],
        name: [2, 1, 1, 1],
        amount1: [1, 1, 1, 1, 1],
        amount2: [1, 1, 1, 1, 1],
        amount3: [1, 1, 1, 1, 1]
      },
      now_col_row_num: {},
      now_col_offset: {},
       
    };
  },
  methods: {
   
    objectSpanMethod({ row, column, rowIndex, columnIndex }) {
      if (!this.now_col_row_num[column.property]) {
        this.now_col_row_num[column.property] = Object.assign([], this.column_row_offset[column.property]);
        let a = this.now_col_row_num[column.property].shift();
        this.now_col_offset[column.property] = a;
        return {
          rowspan: a,
          colspan: 1
        };
      } else if (rowIndex >= this.now_col_offset[column.property]) {
        let a = this.now_col_row_num[column.property].shift();
        this.now_col_offset[column.property] += a;
        return {
          rowspan: a,
          colspan: 1
        };
      } else {
        return {
          rowspan: 0,
          colspan: 0
        };
      }
 
    }
  }
};
</script>

最后说思路：

主要是根据data中的column_row_offset表示哪几行要合并。