购物车案例
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title></title>
<link rel="stylesheet" href="ShoppingCss.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>
<td>{{item.price | showPrice}}</td>
<td>
<button @click="decrement(index)" v-bind:disabled="item.count <= 1">-</button>
{{item.count}}
<button @click="increment(index)">+</button>
</td>
<td><button @click="removeClick(index)">移除</button></td>
</tr>
</tbody>
</table>
<h2>总共的价格为:{{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>
table {
border: 1px solid #e9e9e9;
border-collapse: collapse;
border-spacing: 0;
}
th,td {
padding: 9px 16px;
border: 1px solid #e9e9e9;
text-align: left;
}
th {
background-color: aqua;
color: #FF0000;
font-weight: 600;
}
const app = new Vue({
el: '#app',
data: {
books: [
{
id: 1,
name: '《算法导论》',
date: '2021-9',
price: 85.00,
count: 1
},
{
id: 2,
name: '《喜羊羊与灰太狼》',
date: '2021-9',
price: 45.00,
count: 1
},
{
id: 3,
name: '《计算机网络》',
date: '2021-9',
price: 56.00,
count: 1
},
{
id: 4,
name: '《神雕侠侣》',
date: '2021-9',
price: 30.00,
count: 1
},
]
},
methods: {
increment(index) {
this.books[index].count++
},
decrement(index) {
this.books[index].count--
},
removeClick(index) {
this.books.splice(index, 1)
}
},
computed: {
totalPrice() {
let totalCount = 0
for(let i = 0; i < this.books.length; i++) {
totalCount += this.books[i].price * this.books[i].count
}
return totalCount
}
},
filters: {
showPrice(price) {
return '¥' + price.toFixed(2)
}
}
})