购物车价格统计是前端计算还是后台计算?
购物车价格统计是前端计算还是后台计算?
具体问题:
添加了商品到购物车后,就会自动统计价格,显示总价格!那这个统计价格功能是通过前端js计算的,还是把每个产品的id以及数量传给后台,计算完再返回给前端页面呢?
回复:
可以肯定的说,前端和后端都要计算:
前端计算,一般是通过页面加载后的商品信息,JS计算出添加后的购物车每个商品价格和总价格,这主要是方面页面展示给用户,只是有时候会有一些特殊业务情况下的复杂费用(例如有时会需要根据根据购买商品的不同动态计算手续费)会通过Ajax来请求后台计算并传递数据给前端展示;
后端计算,是必不可少的,客户端传递过来的数据是不可信的,实际的价格肯定以后端的计算为主,并对前端传递的计算结果进行校验,校验不通过,无法完成后续逻辑;
综合而言,“两手都要抓,两手都要硬”,一为用户体验,一为数据正确性。
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