el-table一样的行合并

 import { getRowSpanMethod } from './use-span-method';
<el-table
                row-key="id"
                v-loading="tableLoading"
                :data="tableListData"
                :max-height="tableHeight"
                :span-method="spanMethod"
            >
</el-table>

const spanMethod = computed(() => {
    return getRowSpanMethod(tableListData.value, ['orgName', 'instanceCode']);
});

use-span-method.js

/**
 * 合并相同数据，导出合并列所需的方法(只适合el-table)
 * @param {Object} data
 * @param {Object} rowSpanArray
 */
export function getRowSpanMethod(data, rowSpanArray) {

    /**
     * 要合并列的数据
     */
    const rowSpanNumObject = {};

    //初始化 rowSpanNumObject
    rowSpanArray.map(item => {
        rowSpanNumObject[item] = new Array(data.length).fill(1, 0, 1).fill(0, 1);
        rowSpanNumObject[`${item}-index`] = 0;
    });
    //计算相关的合并信息
    for (let i = 1; i < data.length; i++) {
        rowSpanArray.map(key => {
            const index = rowSpanNumObject[`${key}-index`];
            if (data[i][key] === data[i - 1][key]) {
                rowSpanNumObject[key][index]++;
            } else {
                rowSpanNumObject[`${key}-index`] = i;
                rowSpanNumObject[key][i] = 1;
            }

        });
    }

    //提供合并的方法并导出
    const spanMethod = function({ row, column, rowIndex, columnIndex }) {
        if (rowSpanArray.includes(column['property'])) {
            const rowspan = rowSpanNumObject[column['property']][rowIndex];
            if (rowspan > 0) {
                return { rowspan: rowspan, colspan: 1 }
            }
            return { rowspan: 0, colspan: 0 }
        }
        return { rowspan: 1, colspan: 1 }
    };

    return spanMethod;
}