微信小程序顶部导航栏可滑动并选中放大

<!-- 导航栏 -->
<scroll-view scroll-x class="navbar" scroll-with-animation scroll-left="{{scrollLeft}}rpx">
 <view class="nav-item" wx:for="{{tabs}}" wx:key="id" bindtap="tabSelect" data-id="{{index}}">
  <view class="nav-text {{index==tabCur?'tab-on':''}}">{{item.name}}</view>
 </view>
</scroll-view>

/ 导航栏布局相关 /
.navbar {
 width: 100%;
  height: 90rpx;
 / 文本不换行 /
 white-space: nowrap;
 display: flex;
 box-sizing: border-box;
 border-bottom: 1rpx solid #eee;
 background: #fff;
 align-items: center;
 / 固定在顶部 /
 position: fixed;
 left: 0rpx;
 : 0rpx;
}

.nav-item {
 padding-left: 25rpx;
 padding-right: 25rpx;
 height: 100%;
 display: inline-block;
 / 普通文字大小 /
 font-size: 28rpx;
}

.nav-text {
 width: 100%;
 height: 100%;
 display: flex;
 align-items: center;
 justify-content: center;
 letter-spacing: 4rpx;
 box-sizing: border-box;
}

.tab-on {
 color: #fbbd08;
 / 选中放大 /
 font-size: 38rpx !important;
 font-weight: 600;
 border-bottom: 4rpx solid #fbbd08 !important;
}

// pages/test2/test2.js
Page({
 data: {
  tabCur: 0, //默认选中
  tabs: [{
    name: '等待支付',
    id: 0
   },
   {
    name: '待发货',
    id: 1
   },
   {
    name: '待收货',
    id: 2
   },
   {
    name: '待签字',
    id: 3
   },
   {
    name: '待评价',
    id: 4
   },
   {
    name: '五星好评',
    id: 5
   },
   {
    name: '差评订单',
    id: 6
   },
   {
    name: '编程小石头',
    id: 8
   },
   {
    name: '小石头',
    id: 9
   }
  ]

 },

 //选择条目
 tabSelect(e) {
  this.setData({
   tabCur: e.currentTarget.dataset.id,
   scrollLeft: (e.currentTarget.dataset.id - 2)  200
  })
 }
})