element中合并单元格操作

<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>

    <el-table
      :data="tableData"
      :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 {
        tableData: [{
          id: ‘12987122‘,
          name: ‘王小虎‘,
          amount1: ‘234‘,
          amount2: ‘3.2‘,
          amount3: 10
        }, {
          id: ‘12987123‘,
          name: ‘王小虎‘,
          amount1: ‘165‘,
          amount2: ‘4.43‘,
          amount3: 12
        }, {
          id: ‘12987124‘,
          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
        },{
          id: ‘12987126‘,
          name: ‘王小虎‘,
          amount1: ‘539‘,
          amount2: ‘4.1‘,
          amount3: 15
        }]
      };
    },
    methods: {
      // row当前行数据, column当前列数据, rowIndex行号, columnIndex列号
      arraySpanMethod({ row, column, rowIndex, columnIndex }) {
        if (rowIndex % 2 === 0) {
          if (columnIndex === 0) {
            // 从第0列开始合并三列为一格
            return [1, 3];
          } else if (columnIndex === 1||columnIndex === 2) {
            // 清除第1和第2列
            return [0, 0];
          }
        }
      },

      objectSpanMethod({ row, column, rowIndex, columnIndex }) {
        if (columnIndex === 0) {
          if (rowIndex % 3 === 0) {
            // 从偶数行开始合并3行为一格
            return {
              rowspan: 3,
              colspan: 1
            };
          } else {
            // 删除%3不为0的行数据
            return {
              rowspan: 0,
              colspan: 0
            };
          }
        }
      }
    }
  };
</script>