easyshop-wxmini/lib/navbar/index.wxml

<view style="height: {{ navHeight }}px;" class="nav-bar">
   <view style="height: {{ menuBtnHeight }}px; bottom: {{ navTop }}px;" class="nav-title {{ fixed ? 'nav-black' : '' }}">
      <van-icon wx:if="{{ is_back }}" custom-style="position: absolute; bottom: {{ navTop }}px; left: 10px" name="arrow-left" size="24" bindtap="navBack" />
      {{ name }}
   </view>
</view>