<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
<script src="https://www.qianduanzhan.com"></script>
</head>
<body>
<div id="app1">
<input type="text" v-model="n1"> +
<input type="text" v-model="n2"> =
<input type="text" v-model="sum">
</div>
<script>
var app = new Vue({
el:'#app1',
data:{
n1:'2',
n2:'3'
},
computed:{
sum:function(){
return this.n1*1 + this.n2*1;
}
}
});
</script>
</body>
</html>
