<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
</head>
<body>
<div id="app">
<p>{{firstName+'•'+lastName}}</p>
<p>----------函数----------</p>
<p>{{getFullName()}}</p>
<p>{{getFullName()}}</p><!-- 会再次执行调用函数运算 -->
<p>----------计算属性----------</p>
<p>{{fullName}}</p>
<p>{{fullName}}</p><!-- 先进行检查缓存,存在则直接拿第一次计算的缓存,不再进行再次运算 -->
<p>{{fullName_}}</p>
<p>{{totalScore}}</p>
</div>
<script src="js/vue.3.2.2.js"></script>
<script>
// 1、创建Vue的实例对象
const app = Vue.createApp({
data(){//定义数据
return {
msg:'你好！',
firstName: '乔治',
lastName: '希尔',
members:[
{id:1,name:"张三",score:13232},
{id:2,name:"李四",score:14232}
]
}
},
//计算属性
computed:{
/*细节:本质上还是属性,写法如函数,命名如属性*/
fullName(){
console.log("========fullName=========")
return this.firstName+'•'+this.lastName;
},
fullName_:{
set(arg1){
console.log("-------set()--------");
const nameArr = arg1.split("•");
this.firstName=nameArr[0];
},
get(){
console.log("------get()-------");
return this.firstName+'•'+this.lastName;
}
},
totalScore(){
let total=0;
for(let member of this.members){
total+=member.score;
}
return total;
}
},
methods:{
getFullName(){
console.log("---------getFullName-----------");
return this.firstName+'•'+this.lastName;
}
}
}).mount('#app');
</script>
</body>
</html>
