实现效果
用到了filter、map、reduce等高阶函数
index.html代码
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
<link rel="stylesheet" href="style.css">
</head>
<body>
<div id="app">
<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>{
{item.id}}</td>
<td>{
{item.name}}</td>
<td>{
{item.date}}</td>
<!--过滤器-->
<td>{
{item.price | showPrice}}</td>
<td>
<button @click="decrement(index)" :disabled="item.count<=1">-</button>
{
{item.count}}
<button @click="increment(index)">+</button>
</td>
<td><button @click="removeHandler(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="../js/vue.js"></script>
<script src="main.js"></script>
</body>
</html>
style.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;
}
main.js
const app = new Vue({
el:'#app',
data: {
books: [
{
id: 1,
name: '《算法导论》',
date: '2006-9',
price: 85.00,
count: 1
},
{
id: 2,
name: '《UNIX编程艺术》',
date: '2006-2',
price: 59.00,
count: 1
},
{
id: 3,
name: '《编程珠玑》',
date: '2006-9',
price: 39.00,
count: 1
},
{
id: 4,
name: '《代码大全》',
date: '2006-9',
price: 128.00,
count: 1
},
]
},
methods: {
decrement(index) {
this.books[index].count--;
},
increment(index) {
this.books[index].count++;
},
removeHandler(index) {
this.books.splice(index,1)
}
},
computed: {
totalPrice() {
return this.books.reduce(function (preValue,book) {
return preValue + book.price * book.count
},0)
}
},
filters: {
showPrice(price) {
return '￥' + price.toFixed(2)
}
}
})