Detailed explanation of the scrolling tab effect of the ScrollTab component of the WeChat applet YDUI

<!--导航 -->
<view class="tui-fixed-left">
 <scroll-view class="tui-city-scroll" scroll-x="true">
  <text bindtap="getStatus" id="NAV{{index}}" class="tui-nav-li {{index === status ? &#39;tui-nav-active&#39; : &#39;&#39;}}" data-index="{{index}}" wx:for="{{navList}}">{{item}}</text>
 </scroll-view>
</view>
<!--列表滚动区 -->
 <view class="tui-fixed-y">
 <scroll-view class="tui-city-scroll-y" scroll-y="true" scroll-into-view="NAV{{status}}" scroll-with-animation="true">
  <view wx:for="{{navList}}">
   <view id="NAV{{index}}" class="tui-list-head">{{item}}</view>
   <view class="tui-list-li">{{item}} 列表 {{index}}</view>
  </view>
 </scroll-view>
</view>

.tui-fixed-x{
 margin-left: 130px;
 position: fixed;
 top: 0;
 left: 0;
}
.tui-fixed-left{
 width: 120px;
 height: 100%;
 border-right: 1px solid #dfdfdf;
 position: fixed;
 background-color: #f5f5f5;
 top: 0;
 left: 0;
}
.tui-list-head{
 background-color: #fff;
 margin-bottom: 15px;
}
.tui-city-scroll{
 width: 100%;
}
.tui-nav-li{
 font-size: 30rpx;
 padding: 0 10px;
 height: 100rpx;
 line-height: 100rpx;
 width: 100px;
 display: block;
 border-bottom: 1px solid #dfdfdf;
 position: relative;
 z-index: 10;
}
.tui-nav-active{
 background-color: #fff;
}

.tui-fixed-y{
 margin-left: 120px;
 padding-left: 10px;
 padding-right: 10px;
 height: 100%;
 position: fixed;
 bottom: 0;
 right: 0;
}
.tui-city-scroll-y{
 height: 100%;
 box-sizing: border-box;
}
.tui-list-head{
 height: 50px;
 line-height: 50px;
 text-align: center;
 font-size: 30rpx;
 color: blue;
}
.tui-list-li{
 height: 400px;
 padding: 10rpx;
 color: #fff;
 font-size: 50rpx;
 background-color: lightgreen;
}

Page({
 data: {
  navList: ['今日特惠', '烟灶推荐', '净水饮水推荐', '洗碗机推荐', '电热推荐', '燃热推荐', '消毒柜推荐', '嵌入式推荐', '商用电器', '活动说明'],
  status: 0
 },
 getStatus(e) {
  this.setData({ status: e.currentTarget.dataset.index })
 }
})