Vue Cli（脚手架）实现购物车小案例

Vue Cli（脚手架）实现购物车小案例

首先安装脚手架

npm install -g @vue/cli

然后执行

vue create totalprice

项目创建完成后的目录

在App.vue里面编写代码，如下

<template>
    <div>
        <div v-if="cartlist.length <=0 ">你没有选择的商品，购物车为空， 去购物</div>
        <table v-else>
            <caption>
                <h1>购物车</h1>
            </caption>
            <tr>
                <th>选中</th>
                <th>编号</th>
                <th>商品名称</th>
                <th>商品价格</th>
                <th>购买数量</th>
                <th>操作</th>
            </tr>
            <tr v-for="(item,index) in cartlist" :key="item.id">
                <td><input type="checkbox" v-model="item.checkbox"></td>
                <td>{{item.id}}</td>
                <td>{{item.name}}</td>
                <td><small>￥</small>{{item.price.toFixed(2)}}</td>
                <td>
                    <button @click="item.count--" :disabled="item.count<=1">-</button>
                    {{item.count}}
                    <button @click="item.count++">+</button>
                </td>
                <td><a href="#" @click.prevent="del(index)">删除</a></td>
            </tr>
            <tr>
                <td colspan="3" align="right">总价</td>
                <td colspan="3">{{totalPrice}}</td>
            </tr>
        </table>
    </div>
</template>
<script>
    export default {
        name: 'App',
        data() {
            return {
                cartlist: [{
                        id: 1,
                        checkbox: true,
                        name: '《细说PHP》',
                        price: 10,
                        count: 1
                    },
                    {
                        id: 2,
                        checkbox: true,
                        name: '《细说网页制作》',
                        price: 10,
                        count: 1
                    },
                    {
                        id: 3,
                        checkbox: true,
                        name: '《细说JavaScript语言》',
                        price: 10,
                        count: 1
                    },
                    {
                        id: 4,
                        checkbox: true,
                        name: '《细说DOM和BOM》',
                        price: 10,
                        count: 1
                    },
                    {
                        id: 5,
                        checkbox: true,
                        name: '《细说Ajax与jQuery》',
                        price: 10,
                        count: 1
                    },
                    {
                        id: 6,
                        checkbox: true,
                        name: '《细说HTML5高级API》',
                        price: 10,
                        count: 1
                    },
                ]
            }
        },
        methods: {
            del(index) {
                //根据索引删除商品
                this.cartlist.splice(index, 1);
            }
        },
        computed: {
            totalPrice: {
                get() {
                    let sum = 0;
                    for (let book of this.cartlist) {
                        if (book.checkbox) {
                            //计算商品价格
                            sum += book.price * book.count;
                        }
                    }
                    return '￥' + sum.toFixed(2);
                }
            }
        }
    }
</script>
<style scoped>
    table {
        width: 600px;
        border: 1px solid #888888;
        border-collapse: collapse;
    }
    th {
        background: #ccc;
    }
    td,
    th {
        border: 1px solid #888888;
        padding: 10px;
    }
</style>

运行 npm run serve

效果展示