微信小程序购物车功能实现

wxml文件json <!--pages/cart/cart.wxml--> < block wx:if= "{{hasList}}"> < view class= "cart-box" > <!-- wx:for 渲染购物车列表 --> < view wx:for= "{{carts}}" wx:key= "key" class= "cart_container"> <!-- wx:if 是否选

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