v-model :
通过v-model 进行双向绑定 ，将data的数据与input 绑定在一起，呈现在页面上
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>vue入门</title>
<script src="https://cdn.jsdelivr.net/npm/[email protected]/dist/vue.js"></script>
</head>
<body>
<div id="first">
姓氏:<input v-model="firstname"/><br>
名字:<input v-model="lastname"/>
<div>{{firstname}}{{lastname}}</div>
</div>
<script>
new Vue({
el:"#first",
data:{
firstname:'',
lastname:''
}
})
</script>
</body>
</html>
效果：
2018-05-01 23:40:46