vue购物车功能
阿旋要毕业~ 人气:01.实现效果：
2.涉及到的知识点：
toFixed函数、过滤器、reduce高阶函数、v-bind:disabled、v-if
3.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>书籍购物车案例</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">
<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 | finalPrice}}</td>
<td>
<button @click="item.count--" :disabled="item.count <=1">-</button>
{{item.count}}
<button @click="item.count++">+</button>
</td>
<td><button @click="btndelete(index)">移除</button></td>
</tr>
</tbody>
</table>
<h2>总价格：{{sumPrice | finalPrice}}</h2>
</div>
<div v-else><h2>购物车为空</h2></div>
</div>
<script src="../../js/vue.js"></script>
<!-- <script src="https://cdn.jsdelivr.net/npm/vue@2/dist/vue.js"></script> -->
<script>
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: '《算法导论》',
date: '2006-9',
price: 85.00,
count:1
},
{
id: 3,
name: '《算法导论》',
date: '2006-9',
price: 85.00,
count:1
},
{
id: 4,
name: '《算法导论》',
date: '2006-9',
price: 85.00,
count:1
},
{
id: 5,
name: '《算法导论》',
date: '2006-9',
price: 85.00,
count:1
}
]
},
methods: {
btndelete(index){
this.books.splice(index,1);
}
},
filters: {
finalPrice(price){
return '￥' + price.toFixed(2);
}
},
computed: {
sumPrice(){
// 计算价格法1：
// let sum = 0;
// for(let book of this.books) {
// sum += book.price * book.count;
// }
// return sum;
// 计算价格法2,使用reduce函数。
return this.books.reduce(((preValue,book)=>preValue + book.count * book.price),0);
}
}
})
</script>
</body>
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