vue通过数据驱动实现表格行的增加与删除

   <el-table
                                    :data="modalFormData.items "
                                    border
                                    style="width: 100%">
                                <el-table-column
                                        label="名称"
                                        　>
                                    <template slot-scope="scope">
                                        <el-input v-model="scope.row.labelName" placeholder="请输入label"></el-input>
                                    </template>
                                </el-table-column>
                                <el-table-column
                                        label="值">
                                    <template slot-scope="scope">
                                        <el-input v-model="scope.row.labelValue" placeholder="请输入值"
                                        ></el-input>
                                    </template>
                                </el-table-column>
                                <el-table-column label="操作" 　:render-header="renderHeader" 　>
                                    <template slot-scope="scope">
                                        <el-button-group>
                                            <el-button size="mini" type="danger" @click="renderRemoveRow(scope.$index)">
                                                删除
                                            </el-button>
                                        </el-button-group>
                                    </template>
                                </el-table-column>
                            </el-table>

  renderHeader(h, params) {
                let a = [h('el-button', {
                    props: {
                        size: "mini",
                        type: "primary"
                    },
                    on: {
                        click: () => {
                            this.renderAddRow();
                        }
                    }
                }, '增加')];
                return h('div', a);
            },

            renderAddRow() {
                this.modalFormData.items.push({"labelValue": "", "labelName": ""});
            },
            renderRemoveRow(index) {

                this.modalFormData.items.splice(index, 1);
            }