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经典的图书计价案例
?首先搭建HTML页面
<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="(items,index) in books">
<td>{{items.id}}</td>
<td>{{items.name}}</td>
<td>{{items.date}}</td>
<td>{{getPrice(items.price)}}</td>
<td>
<button @click="decrement(index)">-</button>
{{items.count}}
<button @click="increment(index)">+</button>
</td>
<td @click="remove(index)"><button>移除</button></td>
</tr>
</tbody>
</table>
</div>
<div v-else>购物车为空</div>
<h2>总价格：{{totalPrice}}</h2>
</div>
CSS
<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>
?然后是js部分
动态绑定数据
绑定方法
通过遍历，遍历books计算总价
<script>
const app = new Vue({
el: '#app',
data: {
books: [{
id: 1,
name: '《算法导论》',
date: '2006-9',
price: 85.0,
count: 1,
},
{
id: 2,
name: '《UNIX编程艺术》',
date: '2006-2',
price: 59.0,
count: 1,
},
{
id: 3,
name: '《编程珠玑》',
date: '2008-10',
price: 39.0,
count: 1,
},
{
id: 4,
name: '《代码大全》',
date: '2006-3',
price: 128.0,
count: 1,
},]
},
methods: {
getPrice(price) {
return "￥" + price.toFixed(2)
},
increment(index) {
this.books[index].count++
},
decrement(index) {
this.books[index].count--
if (this.books[index].count = 1) {
this.books[index].count = 1
}
},
remove(index) {
this.books.splice(index, 1)
}
},
computed: {
totalPrice() {
totalPrice = 0
for (i = 0; i < this.books.length; i++) {
totalPrice += this.books[i].price * this.books[i].count
}
return totalPrice
}
}
})
</script>
全部代码
<!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>Document</title>
<script src="../js/vue.js"></script>
<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="(items,index) in books">
<td>{{items.id}}</td>
<td>{{items.name}}</td>
<td>{{items.date}}</td>
<td>{{getPrice(items.price)}}</td>
<td>
<button @click="decrement(index)">-</button>
{{items.count}}
<button @click="increment(index)">+</button>
</td>
<td @click="remove(index)"><button>移除</button></td>
</tr>
</tbody>
</table>
</div>
<div v-else>购物车为空</div>
<h2>总价格：{{totalPrice}}</h2>
</div>
<script>
const app = new Vue({
el: '#app',
data: {
books: [{
id: 1,
name: '《算法导论》',
date: '2006-9',
price: 85.0,
count: 1,
},
{
id: 2,
name: '《UNIX编程艺术》',
date: '2006-2',
price: 59.0,
count: 1,
},
{
id: 3,
name: '《编程珠玑》',
date: '2008-10',
price: 39.0,
count: 1,
},
{
id: 4,
name: '《代码大全》',
date: '2006-3',
price: 128.0,
count: 1,
},]
},
methods: {
getPrice(price) {
return "￥" + price.toFixed(2)
},
increment(index) {
this.books[index].count++
},
decrement(index) {
this.books[index].count--
if (this.books[index].count = 1) {
this.books[index].count = 1
}
},
remove(index) {
this.books.splice(index, 1)
}
},
computed: {
totalPrice() {
totalPrice = 0
for (i = 0; i < this.books.length; i++) {
totalPrice += this.books[i].price * this.books[i].count
}
return totalPrice
}
}
})
</script>
</body>
</html>
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