<!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>computed计算属性</title>
<script src="../js/vue221.js"></script>
</head>
<body>
<div id="app">
<input type="text" v-model="newName">
{{newName}}
</div>
<script>
var vm=new Vue({
el:"#app",
data:{
firstName:"wang",
lastName:"yi"
},
computed:{ //通过原有数据产生新的数据
newName:{
get:function(){ //get方式
return this.firstName+this.lastName
},
set:function(value){ //set方式 value是设置后的newName的值
let arr=vaalue.split(" ")
this.firstName=arr[0];
this.lastName=arr[1];
}
}
}
})
</script>
</body>
</html>
