微信小程序 wx:if 多条件判断

 <view wx:if="{{a}}">单个条件</view>
 <view wx:if="{{a || b}}">多个或条件</view>
 <view wx:if="{{a && b}}">多个且条件</view>

 <!-- wx:if else 的判断 -->
 <view wx:if="{{a>1}}">1</view>
 <view wx:elif="{{a < 1}}">0</view>
 <view wx:else>5</view>