使用v-for，同时指定key(用v-bind绑定)
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Hello World</title>
<script src="../js/vue.js"></script>
</head>
<body>
<div id="app">
<ul>
<li v-for="(item, index) in persons" :key='index'>
{{item.name}}---{{item.age}}---
<button @click="delPerson(index)">删除</button>---
<button @click="updatePerson(index, {name:'cat', age:12})">更新</button>
</li>
</ul>
</div>
<script>
const vm = new Vue({
el: '#app',
data: {
persons: [
{name:'tom', age:19},
{name:'jerry', age:15},
{name:'spike', age:20}
]
},
methods:{
delPerson(index){
this.persons.splice(index, 1)
},
updatePerson(index, newPerson){
this.persons.splice(index, 1, newPerson)
}
}
})
</script>
</body>
</html>
