vue书籍购物车 vue实现书籍购物车功能

时间:2021-10-27 今天会下雨吗人气:0
想了解vue实现书籍购物车功能的相关内容吗，今天会下雨吗在本文为您仔细讲解vue书籍购物车的相关知识和一些Code实例，欢迎阅读和指正，我们先划重点：vue书籍购物车,vue书籍购物,vue购物车，下面大家一起来学习吧。
效果图

点击增加、减少购买数量和移除总价格会变化
代码

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>书籍购物车</title>
    <style>
        table{
            border: 1px solid #e9e9e9;
            border-collapse: collapse;
            border-spacing: 0;
        }
        th, td{
            padding: 8px 16px;
            border: 1px solid #e9e9e9;
            text-align: left;
        }
        th{
            background-color: #f7f7f7;
            color: #5c6b77;
            font-weight: 600;
        }
    </style>
</head>
<body>
    <div id="app" v-cloak>
        <div v-if="books.length">
            <table>
                <thead>
                    <tr>
                        <th></th>
                        <th>书籍名称</th>
                        <th>出版日期</th>
                        <th>价格</th>
                        <th>购买数量</th>
                        <th>操作</th>
                    </tr>
                </thead>
                <tbody>
                    <tr v-for="(item, index) in books">
                        <td>{{index+1}}</td>
                        <td>{{item.name}}</td>
                        <td>{{item.date}}</td>
                        <td>{{item.price | showPrice}}</td>
                        <td>
                            <!-- disabled 为true时按钮禁用 -->
                            <button @click="reduce(index)" v-bind:disabled="item.count <= 1">-</button>
                            {{item.count}}
                            <button @click="increase(index)">+</button>
                        </td>
                        <td><button @click="remove(index)">移除</button></td>
                    </tr>
                </tbody>
            </table>
            <h2>总价格：{{totalPrice | showPrice}}</h2>
        </div>
        <h2 v-else>购物车为空</h2>
    </div>
    <script src="https://cdn.jsdelivr.net/npm/vue/dist/vue.js"></script>
    <script>
        const app = new Vue({
            el: "#app",
            data:{
                books:[
                    {
                        name: '《算法导论》',
                        date: '2021-8-1',
                        price: 85.00,
                        count: 1
                    },
                    {
                        name: '《UNIX编程艺术》',
                        date: '2021-8-2',
                        price: 69.00,
                        count: 1
                    },
                    {
                        name: '《编程珠玑》',
                        date: '2021-8-3',
                        price: 35.00,
                        count: 1
                    },
                    {
                        name: '《DOM编程艺术》',
                        date: '2021-8-4',
                        price: 75.00,
                        count: 1
                    },
                    {
                        name: '《nodejs深入浅出》',
                        date: '2021-8-5',
                        price: 105.00,
                        count: 1
                    },
                ],
                
            },
            methods:{
                reduce(index){
                    this.books[index].count--;
                },
                increase(index){
                    this.books[index].count++;
                },
                remove(index){
                    this.books.splice(index,1);

                },
            },
            computed:{
                // 写在计算属性里的方法可以直接当属性使用
                totalPrice(){
     //let totalPrice = 0;

                    // 1. 普通的for循环
                    // for (let i = 0; i < this.books.length; i++) {
                    //     totalPrice += this.books[i].count * this.books[i].price;
                    // }

                    // 2. 步骤稍简单的普通for循环
                    // for (let i in this.books) {
                    //     totalPrice += this.books[i].count * this.books[i].price;
                    // }

                    // 3. for(let item of this.books)
                    //for(let item of this.books){
                        //totalPrice += item.count * item.price;
                    //}
                    //return totalPrice;

     // 4. 高阶函数写法 reduce
     // 直接返回结果 不需要定义变量，也不需要遍历
     return this.books.reduce(function(pre, book){
                        return pre + book.price * book.count;
                    },0);
            },
            // 过滤器
            filters:{
                showPrice(price){
                    return "￥" + price.toFixed(2);
                }
            }
        })
    </script>
</body>
</html>
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