<!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">
<script type="text/javascript" src="../js/vue.js"></script>
<title>Document</title>
</head>
<body>
<div id="root">
姓 <input type="text" v-model="firstNam" ><br>
名 <input type="text" v-model="lastName"><br>
全名 <span>{{fullName}}</span>
</div>
<script>
const vm=new Vue({
el: "#root",
data: {
firstNam: "张",
lastName:"三"
},
computed:{
fullName:{
//当有人读取fullName时，get就会被调用，且返回值就作为fullName的值
//初次读取fullName会被调用get ，所依赖的数据发生变化的时候get也重新调用
get(){
return this.firstNam+"-"+this.lastName;
},
//set当fullName被修改时
set(value){
const arr=value.split("-");
this.firstNam=arr[0];
this.lastName=arr[1];
}
}
}
})
</script>
</body>
</html>
插值法实现
<!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">
<script type="text/javascript" src="../js/vue.js"></script>
<title>Document</title>
</head>
<body>
<div id="root">
姓 <input type="text" v-model="firstNam" ><br>
名 <input type="text" v-model="lastName"><br>
全名 <span>{{firstNam}}-{{lastName}} </span>
</div>
<script>
new Vue({
el: "#root",
data: {
firstNam: "张",
lastName:"三"
}
})
</script>
</body>
</html>
methods实现
<!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">
<script type="text/javascript" src="../js/vue.js"></script>
<title>Document</title>
</head>
<body>
<div id="root">
姓 <input type="text" v-model="firstNam" ><br>
名 <input type="text" v-model="lastName"><br>
全名 <span>{{fullName()}} </span>
</div>
<script>
new Vue({
el: "#root",
data: {
firstNam: "张",
lastName:"三"
},
methods:{
fullName(){
return this.firstNam+"-"+this.lastName;
}
}
})
</script>
</body>
</html>
标签：el,arr,vue,firstNam,get,lastName,计算,fullName,属性 From： https://www.cnblogs.com/xiaobaizitaibai/p/16836660.html