代码：
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>Document</title>
</head>
<body>
<div id="app">
<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' ::key="item">
<td>{{item.id}}</td>
<td>{{item.name}}</td>
<td>{{item.date}}</td>
<td>{{item.price*item.count | getFinalPrice}}</td>
<td>
<button @click='reduce(index)' :disabled='item.count <= 1'>-</button>
{{item.count}}
<button @click='add(index)'>+</button>
</td>
<td>
<button @click='removeBtn(index)'>移除</button>
</td>
</tr>
</tbody>
</table>
<h2 v-if='books!=""'>总价格:{{theSumOf | getFinalPrice}}</h2>
<h2 v-else>购物车为空</h2>
</div>
</body>
<script src="../js/vue.min.js"></script>
<script>
var app = new Vue({
el: '#app',
data: {
books: [
{
id: 1,
name: '计算机应用',
date: '2006-9',
price: 85.00,
count: 1
},
{
id: 2,
name: 'java应用',
date: '2006-9',
price: 10.00,
count: 1
},
{
id: 3,
name: '大数据',
date: '2006-9',
price: 85.00,
count: 1
},
{
id: 4,
name: 'ui设计师',
date: '2006-9',
price: 85.00,
count: 1
},
],
addAnd:0
},
methods: {
add(index) {
this.books[index].count++
},
reduce(index) {
this.books[index].count--
},
removeBtn(index) {
this.books.splice(index, 1)
}
},
components: {
},
computed: {
theSumOf: function () {
//累加计算的第一种方法
//let sum = 0
//this.books.forEach(item => {
// sum += parseInt(item.price)*parseInt(item.count)
});
//return sum
//累加计算的第二种方式
//let sum = 0
//for(let i in this.books){
//sum += this.books[i].price*this.books[i]*count
}
//return sum
//累加计算的第三种方式
//let sum = 0
//for(let item of this.books){
//sum += item.price*item.count
//}
//return sum
//累加计算的第四种方法
return this.books.reduce(function(preValue,book){
return preValue + book.price*book.count
},0)
}
},
filters: {
getFinalPrice(price) {
return '￥' + price.toFixed(2)
},
}
});
</script>
<html>
关于vue.js的学习教程，请大家点击专题vue.js组件学习教程、Vue.js前端组件学习教程进行学习。
