el-table 合集行合并

1.模板中

2.js中

   2.1计算合计

    /**  计算合计*/
    getSummaries(param) {
      const {
        columns,
        data
      } = param;
      const sums = [];
      columns.forEach((column, index) => {
        const values = data.map(item => Number(item[column.property]))
        if (index === 2) {
          sums[index] = values.reduce((prev, curr) => {
            const value = Number(curr)
            if (!isNaN(value)) {
              return prev + curr
            } else {
              return prev
            }
          }, 0)
          sums[index] = "合计:" + sums[index] + " 万元"
        }
      })
      return sums
    },

2.2合并最后一行

    arraySpanMethod() {
      setTimeout(() => {
        if (this.$refs.tableSumRef1) {
          let current = this.$refs.tableSumRef1.$el
            .querySelector(".el-table__footer-wrapper")
            .querySelector(".el-table__footer");
          let cell = current.rows[0].cells;
          cell[0].style.display = "none";
          cell[1].style.display = "none";
          cell[2].colSpan = "4";
        }
      }, 50);
    },