<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
<script src="./vue.js"></script>
</head>
<body>
<div id="app">
{{fullName}}
{{age}}
</div>
<script>
var vm=new Vue({
el:"#app",
data:{
firstName:"Dell",
lastName:"Lee",
fullName:"Dell Lee",
age:28
},//监听器
watch:{
firstName: function(){
console.log("计算了一次");
this.fullName=this.firstName+" "+this.lastName;
},
lastName: function(){
console.log("计算了一次");
this.fullName=this.firstName+" "+this.lastName;
}
}
// //计算属性
// computed:{
// fullName:function(){
// console.log("计算了一次");
// return this.firstName+" "+this.lastName
// }
// }
})
</script>
</body>
</html>