<wrapper>
  <view class="step-container">
    <view
      class="step-icon-dec"
      catchTap="onDecTap"
    >
      -
    </view>
    <view class="step-num">
      {{defaultNum}}
    </view>
    <view
      class="step-icon-add"
      catchTap="onAddTap"
    >
      <am-icon
        type="add"
        size={{10}}
      />
    </view>
  </view>
</wrapper>