Vue实现购物车功能 Vue实现本地购物车功能

时间:2021-03-30 Eclipextro 人气:0

功能分析 : v-for显示商品名字,价格,数量和对商品进行操作,全选的功能
结构仍然分成 : index.html , index.js , style.css

index.html

<!DOCTYPE html>
<html lang="en">
<head>
 <meta charset="UTF-8">
 <title>购物车实例</title>
 <link rel="stylesheet" href="style.css" >
</head>
<body>
 <div id="app" v-cloak>
 <template v-if="list.length">
 <table>
 <thead>
 <tr>
 <th><input type="checkbox" @click='checkAll' :checked='allCheck'></th>
 <th>序号</th>
 <th>商品名称</th>
 <th>商品单价</th> 
 <th>购买数量</th> 
 <th>操作</th> 
 </tr>
 </thead>
 <tbody>
 <tr v-for="(item,index) in list">
 <td><input type="checkbox" :checked='item.isChecked' @click="singleCheck(index)"></td>
 <td>{{index + 1}}</td>
 <td>{{item.name}}</td>
 <td>{{item.price}}</td>
 <td>
 <button @click="handleReduce(index)" :disable="item.count === 1 ">-</button>
 {{item.count}}
 <button @click="handleAdd(index)">+</button>
 </td>
 <td>
 <button @click="handleRemove">移除</button>
 </td>
 </tr>
 </tbody>
 </table>
 <div>总价 : ¥{{totalPrice}}</div>
 </template>
 <div v-else>购物车为空</div>

 </div>
</body>
<!-- 通过cdn引入-->
<script src="https://cdn.jsdelivr.net/npm/vue/dist/vue.js"></script>
<script src="index.js"></script>
</html>

index.js

const app = new Vue({
 el : '#app',
 data : {
 allCheck:false,
 list : [
 {
 id: 1 ,
 name :'iPhone 8 ',
 price: 6188 ,
 count: 1 ,
 isChecked : false
 },
 {
 id: 2 ,
 name :'小米 8 ',
 price: 5888 ,
 count: 1 ,
 isChecked : false
 },
 {
 id: 3 ,
 name :'iPad Pro ',
 price: 11000 ,
 count: 1 ,
 isChecked : false
 },
 {
 id: 4 ,
 name :'雷神SE9',
 price: 6188 ,
 count: 10 ,
 isChecked : false
 },
 ]
 },
 computed : {
 //通过计算属性获取总价格
 totalPrice:function() {
 let total = 0;
 const newArr = this.list.filter(value => {
 return value.isChecked == true
 })
 for(var i = 0 ;i<newArr.length;i++) {
 total += this.list[i].price * this.list[i].count
 }
 //返回一个符合千分位格式的金额数
 //return total.toString().replace(/\B(?=(\d{3})+$)/g,',')
 return total
 }
 },
 methods : {
 //减法
 handleReduce:function(index) {
 if(this.list[index].count === 1) return ;
 this.list[index].count--;
 },
 //加法
 handleAdd:function(index) {
 this.list[index].count++
 },
 //移除
 handleRemove:function(index) {
 this.list.splice(index,1)
 },
 //全选
 checkAll() {
 this.allCheck = !this.allCheck
 this.list.forEach(value => {
 value.isChecked = this.allCheck
 })
 },
 //单选,当全部选中时,改变全选按钮的状态
 singleCheck(index) {
 this.list[index].isChecked = !this.list[index].isChecked
 const selectData = this.list.filter(value => {
 return value.isChecked == true
 })
 this.allCheck = selectData.length === this.list.length ? true : false
 }
 }
})

style.css

[v-cloak] {
 display: none;
}
table {
 border: 1px solid #e9e9e9;
 border-collapse: collapse;
 border-spacing: 0;
 empty-cells: show;
}
th,td {
 padding: 8px 16px;
 border: 1px solid #e9e9e9;
 text-align: left;
}
th {
 background: yellowgreen;
 color: #5c6b77;
 font-weight: 600;
 white-space: nowrap;
}

效果图如下

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