微信小程序实现通讯录列表展开收起

<view class="mail_content kind-list-item-bd {{item.open ">
 <view class="navigator-box {{item.open ">
 <view>
 <view class="mail_content_list" wx:for="{{item.emplist}}" wx:key="{{index}}" wx:for-item="emplist">
 <view class="mail_content_item flex_align_c">
 <image class="mail_content_item_img" src="/UploadFiles/2021-04-02/headpic.jpg">

js:


data:{
list:[{"id":"1","partname":"系统超管","open":"0","subpart":[],"emplist":[]},{"id":"2","partname":"总经办","open":"0","subpart":[],"emplist":[{"empid":"10081","headpic":"","phone":"18092000580","empname":"李","zhiwu":"总经理","emppartid":"|76|","empcode":"001","part_name":"总经办","empstr":"李"},{"empid":"10163","headpic":"","phone":"13100000000","empname":"销呗助理","zhiwu":"销呗助理","emppartid":"|76|","empcode":"010","part_name":"总经办","empstr":"销"}]},{"id":"3","partname":"财务部","open":"0","subpart":[],"emplist":[]},{"id":"4","partname":"销售部","open":"0","subpart":[{"id":"106","partname":"销售一部","subpart":[],"emplist":[{"empid":"10085","headpic":"","phone":"17502996271","empname":"钟","zhiwu":"业务员","emppartid":"|78|81|","empcode":"005","part_name":"销售一部","empstr":"钟"}]},{"id":"107","partname":"销售二部","subpart":[],"emplist":[{"empid":"10162","headpic":"","phone":"18370152646","empname":"孔","zhiwu":"技术","emppartid":"|78|107|","empcode":"009","part_name":"销售二部","empstr":"孔"}]}],"emplist":[{"empid":"10082","headpic":"","phone":"15349238580","empname":"陈","zhiwu":"财务总监","emppartid":"|78|","empcode":"002","part_name":"销售部","empstr":"陈"}]},{"id":"5","partname":"策划部","open":"0","subpart":[],"emplist":[]},{"id":"6","partname":"技术部","open":"0","subpart":[],"emplist":[{"empid":"10083","headpic":"","phone":"13759945868","empname":"肖","zhiwu":"技术经理","emppartid":"|80|","empcode":"003","part_name":"技术部","empstr":"肖"},{"empid":"10088","headpic":"","phone":"15609291904","empname":"李","zhiwu":"前端","emppartid":"|80|","empcode":"008","part_name":"技术部","empstr":"李"}]}]
}，
 /**
 * 收缩核心代码
 */
 kindToggle(e) {
 const id = e.currentTarget.dataset.id
 // console.log(id)
 const list = this.data.list
 for (let i in list) {
 if (i == id) {
 list[i].open = !list[i].open
 } else {
 list[i].open = false
 }
 }

 /**
 * key和value名称一样时，可以省略
 * 
 * list:list=>list
 */
 this.setData({
 list
 })
 },


CSS:




.mail_item{
 width: 100%;
 padding: 30rpx 30rpx;
 box-sizing: border-box;
 font-size: 34rpx;
 color: #32363c;
 background: #fff;
}
.jiantou{
 color: #B0B6B8;
 margin-right: 10rpx;
}
.mail_content{
 width: 100%;
 overflow: hidden;
 background: #f2f6fc;
}
.mail_title{
 padding: 20rpx 30rpx;
 box-sizing: border-box;
 font-size: 30rpx;
 color: #b0b6b8;
}
.mail_content_list{
 width: 100%;
}
.mail_content_item{
 padding-left:60rpx;
 box-sizing: border-box;
 padding-right: 30rpx;
 background: #fff;
}
.mail_content_item_img{
 width: 90rpx;
 height: 90rpx;
 border-radius: 50%;
 background: #4877bd;
 color: #fff;
 font-size: 36rpx;
 font-weight: 900;
 display: flex;
 align-items: center;
 justify-content: center;
}
.mail_content_item_info{
 padding: 20rpx 0;
 box-sizing: border-box;
 margin-left: 20rpx;
 border-bottom: 1rpx solid rgba(123,126,128,0.15);
}
.mail_content_item_info_name{
 font-size: 35rpx;
 color: #32363c;
 font-weight: bold;
}
.mail_content_item_info_depart,.mail_content_item_info_post{
 color: #6c7072;
 font-size: 30rpx;
 margin-right: 23rpx;
}

.navigator-box {
 opacity: 0;
 position: relative;
 line-height: 1.41176471;
 font-size: 34rpx;
 transform: translateY(-50%);
 transition: 0.3s;
}

.navigator-box-show {
 opacity: 1;
 transform: translateY(0);
}

.navigator {
 padding: 20rpx 30rpx;
 position: relative;
 display: flex;
 align-items: center;
}

.navigator:before {
 content: " ";
 position: absolute;
 left: 30rpx;
 top: 0;
 right: 30rpx;
 height: 1px;
 border-top: 1rpx solid #d8d8d8;
 color: #d8d8d8;
}

.navigator:first-child:before {
 display: none;
}

.navigator-text {
 flex: 1;
}

.navigator-arrow {
 padding-right: 26rpx;
 position: relative;
}

.navigator-arrow:after {
 content: " ";
 display: inline-block;
 height: 18rpx;
 width: 18rpx;
 border-width: 2rpx 2rpx 0 0;
 border-color: #888;
 border-style: solid;
 transform: matrix(0.71, 0.71, -0.71, 0.71, 0, 0);
 position: absolute;
 top: 50%;
 margin-top: -8rpx;
 right: 28rpx;
}

.kind-list-item {
 margin: 20rpx 0;
 background-color: #fff;
 border-radius: 4rpx;
 overflow: hidden;
 border-bottom: 1px dashed #888;
}

.kind-list-item:first-child {
 margin-top: 0;
}

.kind-list-text {
 flex: 1;
}

.kind-list-img {
 width: 60rpx;
 height: 60rpx;
}

.kind-list-item-hd {
 padding: 30rpx;
 display: flex;
 align-items: center;
 transition: opacity 0.3s;
}

.kind-list-item-bd {
 height: 0;
 overflow: hidden;
}

.kind-list-item-bd-show {
 height: auto;
}


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