<!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">
<title>Document</title>
<script src="./vuev2.5.21.js"></script>
<style>
ul{
width: 200px;
border: 1px solid red;
}
li{
width: 100px;
height: 30px;
border: 1px solid black;
margin: 20px;
}
</style>
</head>
<body>
<div id="app">
<ul v-for="(item,index) in list" :key="item.id" ref="ul" :data-index="index">
<a href="javascript:void(0)" @click="fold(index)">切换</a>
<li v-if="item.selected">你好 世界</li>
<li v-else>{{item.name}}</li>
</ul>
</div>
<script>
var vm = new Vue({
el:"#app",
data:{
list:[
{
id:0,
name:"hello world",
selected:true,//后台的值
},
{
id:1,
name:"hello world",
selected:true,//后台的值
},
{
id:2,
name:"hello world",
selected:true,//后台的值
},
{
id:3,
name:"hello world",
selected:true,//后台的值
}
]
},
methods:{
fold(index){
for(let i = 0; i<this.list.length;i++){
let key = JSON.parse(this.$refs.ul[i].dataset.index);
if(key === index){
this.list[i].selected =!this.list[i].selected ;
}
}
},
}
})
</script>
</body>
</html>
原文：https://www.cnblogs.com/tuziling/p/10699457.html