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08-计算属性之computed.html
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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title></title>
<style type="text/css">
*{
padding: 0;
margin: 0;
}
ul{
list-style: none;
}
ul li{
margin: 20px 20px;
padding: 10px 5px;
border-radius: 3px;
}
ul li.active{
background-color: #66FFFF;
}
</style>
</head>
<body>
<div id="app">
<audio :src = 'getCurrentSongSrc' autoplay controls></audio>
<ul>
<li v-for = '(item,index) in musicData' :class = '{active:currentIndex == index}' @click = 'clickHandler(index)'>
<h2>{{item.id}}- 歌名：{{item.name}}</h2>
<p>歌手:{{item.author}}</p>
</li>
</ul>
</div>
<script type="text/javascript" src="../vue.min.js"></script>
<script type="text/javascript">
var musicData = [
{id:1,name:'于荣光 - 少林英雄',author:'于荣光',songSrc:'./static/于荣光 - 少林英雄.mp3'},
{id:2,name:'Joel Adams - Please Dont Go',author:'Joel Adams',songSrc:'./static/Joel Adams - Please Dont Go.mp3'},
{id:3,name:'MKJ - Time',author:'MKJ',songSrc:'./static/MKJ - Time.mp3'},
{id:4,name:'Russ - Psycho (Pt. 2)',author:'Russ',songSrc:'./static/Russ - Psycho (Pt. 2).mp3'}
];
new Vue({
el:'#app',
data(){
return {
musicData:musicData,
currentIndex: 0
}
},
computed:{
getCurrentSongSrc:function() {
// 默认只有getter
return this.musicData[this.currentIndex].songSrc
}
},
methods:{
clickHandler(index){
this.currentIndex = index;
}
}
});
</script>
</body>
</html>