小项目总结 - 码农教程

index.html

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <link rel="stylesheet" href="index.css">
</head>
<body>
<div id="app">
    <div v-if="books.length">
        <table>
            <thead>
            <tr>
                <th>书id</th>
                <th>书名</th>
                <th>日期</th>
                <th>书价格</th>
                <th>购买数量</th>
                <th>操作</th>
            </tr>
            </thead>
            <tbody>
            <tr v-for="(book, index) in books">
                <td>{{book.id}}</td>
                <td>{{book.name}}</td>
                <td>{{book.data}}</td>
                <!--<td>{{'￥' + book.price.toFixed(2)}}</td>-->
                <!--<td>{{getFinalPrice(book.price)}}</td>-->
                <td>{{book.price | showPrice}}</td>
                <td><button @click="decrement(index)" :disabled="book.count <= 0">-</button> {{book.count}} <button @click="increment(index)">+</button></td>
                <td><button @click="removeClick(index)">移除</button></td>
            </tr>
            </tbody>
        </table>
        <div>总价格：{{totalPrice | showPrice}}</div>
        <!--<button disabled>++++</button>-->
    </div>
    <h2 v-else>购物车为空</h2>
</div>

<script src="../js/vue.js"></script>
<script src="index.js"></script>
</body>
</html>

index.css

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;
    text-align: center;
}

index.js

const book = new Vue({
    el: '#app',
    data: {
        books: [
            {
                id: 1,
                name: '《算法导论》',
                data: '2006-9',
                price: 120.00,
                count:1
            },
            {
                id: 2,
                name: '《Linux编程艺术》',
                data: '2006-10',
                price: 85.00,
                count:1
            },
            {
                id: 3,
                name: '《Python异步编程》',
                data: '2006-11',
                price: 59.00,
                count:1
            },
            {
                id: 4,
                name: '《现在操作系统》',
                data: '2006-12',
                price: 39.00,
                count:1
            },
        ]
    },
    computed:{
        totalPrice(){
            // let totalPrice = 0;
            // for(let i=0; i<this.books.length; i++){
            //     totalPrice += this.books[i].price * this.books[i].count
            // }
            // return totalPrice

            return this.books.reduce(function (preValue, book) {
                return preValue + book.price * book.count
            }, 0)
        }
    },
    methods: {
        getFinalPrice(price){
            return '￥' + price.toFixed(2)
        },
        increment(index){
            this.books[index].count++
        },
        decrement(index){
            this.books[index].count--
        },
        removeClick(index) {
            this.books.splice(index, 1)
        }
    },
    filters: {
        showPrice(price){
            return '￥' + price.toFixed(2)
        }
    }
});

最终效果图

原文地址：https://www.cnblogs.com/Alexephor/p/11734308.html