<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
</head>
<body>
<div id="app">
<input v-model="username">
<!-- 插值表达式 -->
{{username}}}
</div>
<script src="js/vue.js"></script>
<script>
//1. 创建Vue核心对象
new Vue({
el:"#app",
data(){
return{
username:""
}
}
});
/*new Vue({
el:"#app",
data:function () {
return{
username:""
}
}
});*/
</script>
</body>
</html>
标签：username,el,Vue,return,入门,data,app,快速 From： https://www.cnblogs.com/Karl-hut/p/17523950.html