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目录
阶段案例：图书购物车
阶段案例：图书购物车
效果图：
效果说明：
商品价格指定显示格式；
总价随数量增减变动；
总价随着删除变动。
style.css
/*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;
}
index.html
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>案例一：图书购物车</title>
<link rel="stylesheet" type="text/css" href="css/style.css"/>
<script src="js/vue.js" type="text/javascript" charset="utf-8"></script>
</head>
<body>
<div id="app">
<table>
<thead>
<tr>
<th></th>
<th>商品名称</th>
<th>商品价格</th>
<th>购买数量</th>
<th>操作</th>
</tr>
</thead>
<tbody>
<tr v-for="(book, index) in books">
<td>{{ index + 1 }}</td>
<td>{{ book.name }}</td>
<td>{{ book.price | showPrice }}</td>
<td>
<button type="button" @click="decrement(index)" :disabled="book.count <= 1">-</button>
<span> {{ book.count }} </span>
<button type="button" @click="increment(index)">+</button>
</td>
<td>
<button type="button" @click="removeHandle(index)" >删除</button>
</td>
</tr>
</tbody>
<tfoot>
<tr><td colspan="5" >总价：{{ totalPrice | showPrice}}</td></tr>
</tfoot>
</table>
</div>
<script src="js/main.js" type="text/javascript" charset="utf-8"></script>
</body>
</html>
main.js
const app = new Vue({
el: '#app',
data: {
books: [
{
id: 1,
name: '《Vue.js权威指南》',
price: 99.00,
count: 1
},
{
id: 2,
name: '《Vue2实践揭秘》',
price: 79.00,
count: 1
},
{
id: 3,
name: '《Vue.js 2.x实践指南》',
price: 47.60,
count: 1
},
]
},
methods: {
increment(index) {
this.books[index].count++
},
decrement(index) {
this.books[index].count--
},
removeHandle(index) {
this.books.splice(index, 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
// for (let i in/of this.books)
// reduce
}
},
filters: {
showPrice(price) {
return ' ' + price.toFixed(2)
}
}
})
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