<scroll-view class="tab-container" scroll-x="true" scroll-with-animation @bindscrolltolower="bindscrolltolower" :lower-threshold="1">
	<view class="tab-item" v-for="(item,index) in datas" :key="index"
		@click="onSelect(index)" >{{item.vipName}}</view>
</scroll-view>

想实现上面tab滑到最右三个之前，最右侧都显示一个方向的图标