<el-table
      ref="table1"
      v-loading="loading"
      :data=""
      :stripe="true"
      height="600"
      show-summary
      :summary-method="getSummaries"
      :show-overflow-tooltip="true"
    >
    ...
     </el-table>

合计部分不显示的问题

 updated() {
    this.$nextTick(() => {
      this.$refs["table1"].doLayout();
      this.getSummaries();
    });
  },

合计部分保留两位小数不生效问题

getSummaries(param) {
      const { columns, data } = param;
      const sums = [];
      columns.forEach((column, index) => {
        if (index === 0) {
          sums[index] = "总价";
          return;
        }
        if (index === 1) {
          sums[index] = "";
          return;
        }

        if (index === 2) {
          sums[index] = "";
          return;
        }

        // console.log("column", column);

        const values = data.map((item) => Number(item[column.property]));
        console.log("values", values);

        if (!values.every((value) => isNaN(value))) {
          sums[index] = values.reduce((prev, curr) => {
            const value = parseFloat(curr);
            if (!isNaN(value)) {
              return prev + curr;
            } else {
              return prev;
            }
          }, 0);
          console.log("sums[index]", sums[index]);

          sums[index] = parseFloat(sums[index]).toFixed(2); // 这里做了再次赋值
          return sums[index];
        } else {
          sums[index] = "";
        }
      });

      return sums;
    },