js实现购物车计算的方法
本文实例为大家分享了js实现购物车计算的具体代码,供大家参考,具体内容如下
以店铺为单位,每个店铺下面有对应的商品选项,可全选,商品单选,店铺单选,商品数量加减,删除
代码:
<script> export default { data() { return { count:0, //所有商品的数量和 shopCarList: [], //所有商品 selectList:[] //已选择的商品 } }, computed: { //选择的合计价格 selectPrice(){ return this.selectList.reduce((total,item,index)=>{ return total+item.quantity*(item.activityPrice || item.price); },0) }, //选择的合计数量 selectNum(){ return this.selectList.reduce((total,item,index)=>{ return total+item.quantity; },0) }, //是否全选 isSelecetAll(){ return this.shopCarList.every(item=>{ return item.shopSelect===true }) } }, methods: { //增加 increment(itm){ itm.quantity<itm.stock?itm.quantity++:''; }, //减少 decrement(itm){ itm.quantity>1?itm.quantity--:'' }, //全选点击 allChooseHandle(){ this.initSelectAll(!this.isSelecetAll); }, //商品单选点击 productChooseHandle(itm,index){ let productFlag = !itm.productSelect; this.$set(itm,'productSelect',productFlag); let shopFlag = this.shopCarList[index].products.every(i=>{ return i.productSelect===true; }) this.$set(this.shopCarList[index],'shopSelect',shopFlag); this.getSelected(); }, //店铺单选点击 shopChooseHandle(item,index){ let Flag = !item.shopSelect; this.$set(item,'shopSelect',Flag); item.products.forEach((itm,idx)=>{ this.$set(itm,'productSelect',Flag); }) this.getSelected(); }, //获取已选商品 getSelected(){ let tempArr = []; this.shopCarList.forEach((item,index)=>{ item.products.forEach((itm,idx)=>{ if(itm.productSelect){ tempArr.push(itm); } }) }) this.selectList = tempArr; }, //是否全选初始化 initSelectAll(Flag){ this.shopCarList.forEach((item,index)=>{ this.$set(item,'shopSelect',Flag); item.products.forEach((itm,idx)=>{ this.$set(itm,'productSelect',Flag); 【文章由高防cdn提供,感恩】 }) }) this.getSelected(); }, //获取购物车列表 getCarList(){ return this.$api.personal.getCarList().then(res=>{ if(res.result==='000'){ //过期商品数 let expiredNum = 0; res.data.expiredList.forEach(item=>{ item.products.forEach(itm=>{ expiredNum += itm.quantity }) }) //有效商品数量 this.count = res.data.count - expiredNum; this.shopCarList = res.data.shopCarList; return Promise.resolve() } }) }, //删除点击 delCarList(itm,index,idx){ this.$api.personal.delCarList( [itm.carId] ).then(res=>{ if(res.result==='000'){ this.count -= itm.quantity; this.shopCarList[index].products.splice(idx,1); if(this.shopCarList[index].products.length===0){ this.shopCarList.splice(index,1); } this.getSelected(); } }) }, }, created() { this.getCarList().then(()=>{ this.initSelectAll(true); }); }, }; </script>
以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持hwidc。