10-computed_setter.html

<!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:{

				// setter  getter
				// getCurrentSongSrc:function() {
				// 	// 默认只有getter
				// 	return this.musicData[this.currentIndex].songSrc
				// }
				getCurrentSongSrc :{
					set:function(newV) {
						console.log(newV); //索引
						this.currentIndex = newV;
					},
					get:function() {
						return this.musicData[this.currentIndex].songSrc;
					}
				}
			},
			methods:{
				clickHandler(index){
					// this.currentIndex = index;
					// console.log(this.getCurrentSongSrc);
					this.getCurrentSongSrc = index;
				}
			}
		});


	</script>
	
</body>
</html>