<van-index-bar index-list="{{ indexList }}" scroll-top="{{ scrollTop }}">
    <van-index-anchor wx:for="{{customerList}}" wx:key="index" index="{{item.firstLetter}}" use-slot="{{true}}">
        {{item.firstLetter}}
        <van-cell wx:for="{{item.list}}" wx:key="index" data-id="{{item.code}}" data-name="{{item.name}}" title="{{item.name}}" bindtap="getCustomer" />
    </van-index-anchor>
</van-index-bar>