1、搭配view
<view wx:if="{{boolean==true}}">
<view class="bg_black"></view>
</view>
<view wx:elif="{{boolean==false}}">
<view class="bg_red"></view>
</view>
<view wx:elif>
<view class="bg_red"></view>
</view>
2、搭配block
<block wx:if="{{order.kind===3}}">
<view class="bg_black"></view>
</block>
<block wx:else>
<view class="bg_red"></view>
</block>
<block wx:if="{{boolean==true}}">
<view class="bg_black"></view>
</block>
<block wx:elif="{{boolean==false}}">
<view class="bg_red"></view>
</block>
<block wx:else>
<view class="bg_red"></view>
</block>
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