数据结构（C）：时间复杂度和空间复杂度

效果 ：

 代码  给每个组件都绑定ref

<template slot-scope="scope">
                                <div>
                                    <el-popover
                                        placement="left"
                                        v-else-if="scope.row.cmiBusiApproveInfo" 
                                        width="400"
                                        :ref="`popover-${scope.$index}`">
                                        <p>审批意见</p>
                                        <el-input
                                            type="textarea"
                                            placeholder="请输入内容"
                                            :rows="6"
                                            v-model="scope.row.approve"
                                            show-word-limit
                                            >
                                        </el-input>
                                        <div style="text-align: center; margin: 10px">
                                                <el-button size="small"  @click="deltaskList(scope.$index)">取消
                                                </el-button>
                                                <el-button size="small"  type="danger"  @click="confirm(scope.row,'reject',scope.$index)">驳回
                                                </el-button>
                                                <el-button size="small" type="primary" @click="confirm(scope.row,'agree',scope.$index)">确定
                                                </el-button>
                                        </div>

                                        <el-button slot="reference"  @click="auditClick(scope.row,scope.$index)" size="mini" >审核</el-button>
                                    </el-popover>

   
                                </div>
                            </template>

 通过他的id去控制关闭

 deltaskList(index){
            this.$refs[`popover-${index}`].doClose()
        },