写一点废话，昨天敲代码找bug,找了好久都没找到，后来一哥们找到他说，找代码的bug就像男女朋友吵架，女问男你错了没，男说错啦，女再问错哪了，男傻眼了不知道错哪。在找代码的过程中一直知道我错啦就是找不到错哪了，哈哈~~~~~~
正文
用vue知识点做购物车，
<!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">
<link rel="stylesheet" href="./bootstrap.min.css">
<title>computed属性实现购物车</title>
<style>
body{
padding-top:100px;
text-align:center;
}
thead>tr>td{
font-weight:bold;
}
.num,.total{
display:inline-block;
120px;
}
</style>
</head>
<body>
<div class="container">
<table class="table table-hover table-bordered table-striped">
<thead>
<tr>
<td>商品名称</td>
<td>商品价格</td>
<td>商品数量</td>
<td>小计</td>
</tr>
</thead>
<tbody>
<tr v-for="(item,index) in products">
<td>{{item.name}}</td>
<td>{{item.price}}</td>
<td>
<button @click="decrease(index)">-</button>
<span class="num">{{item.num}}</span>
<button @click="increse(index)">+</button>
</td>
<td>
<span class="total">{{item.price*item.num}}</span>
</td>
</tr>
</tbody>
<tfoot>
<tr>
<td colspan="4" class="text-right">总价：{{total}}</td>
</tr>
</tfoot>
</table>
</div>
<script src="vue.js"></script>
<script>
new Vue({
el:".container",
data:{
products:[{
name:"TV",
price:2300,
num:1
},{
name:"洗衣机",
price:1500,
num:1
},{
name:"拖鞋",
price:20,
num:2
},{
name:"iphone",
price:9800,
num:1
}]
},
methods:{
increse(index){
this.products[index].num++
},
decrease(index){
if(this.products[index].num===1)return
this.products[index].num--
}
},
computed:{
total(){
var sum=0;
this.products.forEach(function(item){
sum+=item.price*item.num;
})
return sum;
}
}
})
</script>
</body>
</html>