computed Option 计算选项 

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>computed Option  计算选项</title>
    <meta name="flexible" content="initial-dpr=2,maximum-dpr=3" />
    <meta name="apple-mobile-web-app-capable" content="yes">
    <meta content="yes" name="apple-touch-fullscreen">
     <meta content="telephone=no,email=no" name="format-detection">
    <meta content="width=device-width, initial-scale=1.0, minimum-scale=1.0, maximum-scale=1.0, user-scalable=no" name="viewport">
    <script src="../assets/js/flexible_css.js"></script>
    <script src="../assets/js/flexible.js"></script>
    <script src="../assets/js/vue.js"></script>
</head>
<body>
<div id="app">
    <p>{{newPrice}}</p>
    <ul>
        <!-- <li v-for="item in items">{{item.title}}-{{item.date}}</li>   正常循环输出 -->
        <li v-for="item in reverseNews">{{item.title}}-{{item.date}}</li>
    </ul>
</div>
    
</body>
<script type="text/javascript">
    var newsList=[
        {title:'香港或就“装甲车被扣”事件追责 起诉涉事运输公司',date:'2017/3/10'},
        {title:'日本第二大准航母服役 外媒：针对中国潜艇',date:'2017/3/12'},
        {title:'中国北方将有明显雨雪降温天气 南方阴雨持续',date:'2017/3/13'},
        {title:'起底“最短命副市长”：不到40天落马，全家被查',date:'2017/3/23'},
        
      
    ];
    var app=new Vue({
        el:'#app',
        data:{    
            price:100,
            items:newsList        
        },
        computed:{   //computed 的作用主要是对原数据进行改造输出。
            newPrice:function(){
                return this.price='¥'+this.price+'元';
            },
            reverseNews:function(){
                return this.items.reverse();  //reverse  反转容器内容   不实排序 不打乱顺序
            }
        }
    })
</script>

</html>

 

posted @ 2018-02-28 13:31  Jinsuo  阅读(178)  评论(0)    收藏  举报