vue实现购物车功能（商品分类）

 new Vue({ el: "#app", data: { cIndex: 0, lists: [ { title: "推荐商品", goods: [ { id: 0, img: './images/goods.png-600', name: '散称樱桃1', price: '10.00', num: 0 }, { id: 1, img: './images/goods.png-600', name: '散称樱桃1', price: '10.00', num: 0 } ] }, { title: "推荐商品", goods: [ { id: 2, img: './images/goods.png-600', name: '散称樱桃2', price: '20.00', num: 0 }, { id: 3, img: './images/goods.png-600', name: '散称樱桃2', price: '20.00', num: 0 }, ] }, ], carArr: [], appearCar: false, }, computed:{ alltotal:function () { var alltotal = 0; var allNum = 0; for(var i = 0,len = this.lists.length;i<len;i++){ for(var j = 0,goodsLen = this.lists[i].goods.length;j<goodsLen;j++){ alltotal += parseInt(this.lists[i].goods[j].num)*parseFloat(this.lists[i].goods[j].price); allNum += parseInt(this.lists[i].goods[j].num); } } return [alltotal,allNum] }, }, methods: { leftTap: function (index) { this.cIndex = index }, showCar: function () { if (this.carArr.length == 0) { this.appearCar = false } else { this.appearCar = !this.appearCar } }, //商品数量加 addNum: function (data) { data.num++; var carArr = this.carArr; var isCar = false; if (carArr == 0) { carArr.push(data) } for (var i = 0, len = carArr.length; i <len; i++) { if (data.id == carArr[i].id) { isCar = true } } if (!isCar) { carArr.push(data) } }, reduceNum: function (data) { if (data.num <= 0) return; var carArr = this.carArr; data.num--; var isCar = false; for (var i = 0, len = carArr.length; i <len; i++) { if (carArr[i].num <= 0) { carArr.splice(i, 1) } } }, carAddNum: function (index) { this.carArr[index].num++ }, carReduceNum: function (index) { this.carArr[index].num--; if (this.carArr[index].num <= 0) { this.carArr.splice(index, 1) } if (this.carArr.length == 0) { this.appearCar = !this.appearCar } }, // 清空 delCar: function () { confirm('确定清空购物车吗?'); var cur = this.cIndex; var goods = this.lists[cur].goods if (true) { this.carArr = []; this.appearCar = !this.appearCar; for(var i = 0,len = this.lists.length;i<len;i++){ for(var j = 0,goodsLen = this.lists[i].goods.length<b style="color:transparent">本文来源gao@!dai!ma.com搞$$代^@码网*</b>;j<goodsLen;j++){ this.lists[i].goods[j].num=0; } } } }, Settlement:function () { if(this.alltotal[0]<=0){ console.log('我不动') }else{ window.location.href = 'cashierPay.html' } } } })

 <div id="app"> <div class='box'> <div class='boxleft'> <div class='boxla'> <span>扫码</span></div><ul class='boxlbox'>  <li class='boxlb'> <span class='boxlb_inner'>{{item.title}}</span></li></ul></div><ul class='boxright'> <li class='boxri'> <div class='boxri_text'> <div class='boxrit_left'> <p class='boxritl_name'>{{item.name}}</p><p class='boxritl_price'>￥{{item.price}}</p></div><div class='boxrit_right'> <span class='boxrit_right_num'>0">{{item.num}}</span></div></div></li></ul></div><footer class='footer'> <div class='cartImgBox'>  共{{alltotal[1]}}件商品 </div><div class='footerb'>￥{{alltotal[0]}}</div><div class='footerc'>结算</div></footer><!-- 购物车 --><div class='shop-car-mask'> <div class='shop-com'> <div class='shop-title'> <span>已选商品</span><span>清空</span></div><ul class="car-shopList">  <li class='car-list'> <div class='car-img'> </div><div class='car-name'>{{item.name}}</div><div class='car-num'>￥{{item.price}}</div><div class='boxrit_right2'> <span class='boxrit_right_num2'>{{item.num}}</span></div></li></ul></div></div></div>