使用Element UI合并表格的行列元素

因为项目需求做个报表，需要合并单元格元素，便在element UI的例子上做了个扩展：

先看看效果吧

div是这么写的：

<template>
  <div>
    <el-table
      :data="tableData"
      :span-method="arraySpanMethod"
      border
      style="width: 100%">
      <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"
        sortable
        label="数值 1">
      </el-table-column>
      <el-table-column
        prop="amount2"
        sortable
        label="数值 2">
      </el-table-column>
      <el-table-column
        prop="amount3"
        sortable
        label="数值 3">
      </el-table-column>
      <el-table-column
        prop="amount4"
        sortable
        label="数值 4">
      </el-table-column>
      <el-table-column
        prop="amount5"
        sortable
        label="数值 5">
      </el-table-column>
    </el-table>
  </div>
</template>

接下来是js代码：

data() {
      return {
        tableData: [{
          id: '12987122',
          name: '王小虎',
          amount1: '234',
          amount2: '3.2',
          amount3: 10,
          amount4: '3.2',
          amount5: 10
        }, {
          id: '12987123',
          name: '王小虎',
          amount1: '165',
          amount2: '4.43',
          amount3: 12,
          amount4: '4.43',
          amount5: 12
        }, {
          id: '12987124',
          name: '王小虎',
          amount1: '324',
          amount2: '1.9',
          amount3: 9,
          amount4: '1.9',
          amount5: 9
        }, {
          id: '12987125',
          name: '王小虎',
          amount1: '621',
          amount2: '2.2',
          amount3: 17,
          amount4: '2.2',
          amount5: 17
        }, {
          id: '12987126',
          name: '王小虎',
          amount1: '539',
          amount2: '4.1',
          amount3: 15,
          amount4: '4.1',
          amount5: 15
        }]
      };
    },
    methods: {
      // row: 行，column：列；rowIndex：第几行；columnIndex：第几列
      // rowspan: 行宽；colspan: 列宽
      arraySpanMethod({ row, column, rowIndex, columnIndex }) {
        if (rowIndex === 0 && columnIndex === 0) { 
           return {
             rowspan: 2,
             colspan: 1
          }
        } else if (rowIndex === 0 && columnIndex === 2) {
          row.amount1 = 666
          return [1, 2] // 合并列元素
        } else if (rowIndex === 1 && columnIndex === 0) {
          return {
             rowspan: 0,
             colspan: 0
          }
        } else if (rowIndex === 2 && columnIndex === 5) {
          return [1, 2]
        } else if (rowIndex === 3 && columnIndex === 5) {
          return {
             rowspan: 2,
             colspan: 2
          }
        }
      }
    }

其实这里合并单元格的原理是通过设置表格td标签的rowspan和colspan属性实现的；

rowspan：合并行元素

colspan：合并列元素