element-ui–table表格自定义计算合计功能

直接贴代码了

      <el-table
        :data="tableData"
        class="table"
        show-summary //合计方法
        :summary-method="getSummaries" //自定义计算合计
      >

js

    // 表格总计的时间
    getSummaries(param) {
      const { columns, data } = param;
      const sums = [];
      columns.forEach((column, index) => {
        if (index === 0) {
          sums[index] = "总计";
          		//	index 表示表格的第几列开始计算
        } else if (index === 6) {
          const values = data.map((item) => Number(item[column.property]));
          if (!values.every((value) => isNaN(value))) {
            sums[index] = values.reduce((prev, curr) => {
              const value = Number(curr);
              if (!isNaN(value)) {
                return Number(prev.toFixed(2)) + curr;
              } else {
                return prev;
              }
            }, 0);
          } else {
            sums[index] = "N/A";
          }
        } else {
          sums[index] = "--";
        }
      });
      return sums;
    },