实现效果：
实现代码及注释：
<!DOCTYPE html>
<html>
<head>
<title>价格计算器</title>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<style type="text/css">
/* 隐藏未编译的数据绑定，直到Vue实例成功加载 */
[v-cloak]{
display: none;
}
*{
padding: 0;
margin: 0;
}
body{
font: 15px/1.3 "微软雅黑";
color: #545b64;
text-align: center;
}
a, a:visited{
outline: none;
color: #389dc1;
}
a:hover{
text-decoration: none;
}
section, footer, header, aside, nav{
display: block;
}
/*-------------------------
The order form
--------------------------*/
form{
background-color: #d5d5d5;
border-radius: 10px;
box-shadow: 0 1px 1px #ccc;
width: 400px;
padding: 35px 45px;
margin: 50px auto;
box-shadow: 1px 0px 20px #f5f5f5;
}
form h1{
color:#fff;
font-size: 55px;
font-family: "微软雅黑"
font-weight: normal;
line-height:1;
text-shadow:2px 3px 0 rgba(0,0,0,0.1);
font-weight: normal;
}
form ul{
list-style:none;
color:#fff;
font-size:20px;
font-weight:bold;
text-align: left;
margin:20px 0 15px;
}
form ul li{
padding:15px 30px;
background-color:#03c03c;
margin-bottom:10px;
box-shadow:0 1px 1px rgba(0,0,0,0.1);
cursor:pointer;
}
form ul li span{
float:right;
}
form ul li.active{
background-color: orange;
}
div.total{
border-top:1px solid rgba(255,255,255,0.5);
padding:15px 30px;
font-size:20px;
font-weight:bold;
text-align: left;
color:#fff;
text-shadow: 2px 2px 2px rgba(0,0,0,0.1);
}
div.total span{
float:right;
}
</style>
</head>
<body>
<!-- v-cloak隐藏所有没有编译过的数据绑定，直到vue实例准备好 -->
<form id="main" v-cloak>
<h1>价格计算器</h1>
<ul>
<!-- 循环这个服务数组，分配一个点击句柄，并且设置或移除active class -->
<li v-for="service in services" v-on:click="toggleActive(service)" v-bind:class="{'active': service.active}">
<!-- 显示这个数组中每个实体的名称和价格格式化， Vue有一个内置的货币筛选器用于对价格进行 -->
{{service.name}} <span>{{service.price | currency}}</span>
</li>
</ul>
<div class="total">
<!-- 计算所有选定商品的总价格，并且格式化为货币显示方式 -->
总价: <span>{{total() | currency}}</span>
</div>
</form>
<script src="https://cdnjs.cloudflare.com/ajax/libs/vue/2.0.5/vue.min.js"></script>
<script type="text/javascript">
// 定义一个常规过滤器currency
Vue.filter('currency', function(value){
return '￥' + value.toFixed(2);
});
var demo = new Vue({
el: '#main',
data: {
// 定义model属性，view将会循环
// 通过services数组产生一个li
// 定义services每一项的元素
services: [
{
name: "网站开发",
price: 300,
active: true
},
{
name: "设计",
price: 400,
active: false
},
{
name: "一体化整合",
price: 250,
active: false
},
{
name: "操作培训",
price: 220,
active: false
}
]
},
methods: {
toggleActive: function(s){
s.active = !s.active;
},
total: function(){
var total = 0;
this.services.forEach(function(s){
if(s.active){
total+=s.price;
}
});
return total;
}
}
});
</script>
</body>
</html>
