​

1、index.html

<!DOCTYPE html>
<html lang="zh">
<head>
    <meta charset="UTF-8" />
    <title>购物车示例</title>
    <link rel="stylesheet" type="text/css" href="css/style.css"/>
</head>
<body>
    <div id="app" v-cloak>
        <template v-if="list.length">
            <table>
                <thead>
                    <tr>
                        <th></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>
                    <!--注意v-for有可选参数键名和索引(value,key,index)-->
                    <tr v-for='(item,index) in list'>
                        <td>
                            {{index+1}}
                        </td>
                        <td>
                            {{item.name}}
                        </td>
                        <td>
                            {{item.price}}
                        </td>
                        <td>
                            <button @click="handleReduce(index)" :disabled="item.count === 1">-</button>
                            {{item.count}}
                            <button @click="handleAdd(index)">+</button>
                        </td>
                        <td>
                            <button @click="handleRemove(index)">移除</button>
                        </td>
                    </tr>
                </tbody>
            </table>
            <div>总价：¥{{totalPrice}}</div>
        </template>
        <div v-else>
            购物车为空
        </div>
    </div>
    <script src="https://cdn.bootcss.com/vue/2.5.9/vue.min.js"></script>
    <script src="js/index.js" type="text/javascript" charset="utf-8"></script>
</body>
</html>


2、index.js

var app = new Vue({
    el: '#app',
    data: {
        list: [{
                id: 1,
                name: 'iphone 7',
                price: 6188,
                count: 1
            },
            {
                id: 2,
                name: 'iphone 8',
                price: 7188,
                count: 1
            },
            {
                id: 3,
                name: 'iphone X',
                price: 8188,
                count: 1
            },
        ]
    },
    methods: {
        handleReduce: function(index) {
            if(this.list[index].count === 1) return;
            this.list[index].count--;
        },
        handleAdd: function(index) {
            this.list[index].count++;
        },
        handleRemove: function(index) {
            this.list.splice(index, 1);
        }
    },
    computed: {
        totalPrice: function() {
            var total = 0;
            for(var i = 0, len = this.list.length; i < len; i++) {
                total += this.list[i].price * this.list[i].count;
            }
            //每隔三位加一个逗号
            return total.toString().replace(/\B(?=(\d{3})+$)/g, ',');
        }
    }
})



3、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: #f7f7f7;
    color: #5c6b77;
    font-weight: 600;
    white-space: nowrap;
}


4、效果

VUE购物车示例_css