vue

简化js

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>hello</title>

</head>
<body>

<div id="app">
<input v-model="username">
    {{username}}
</div>
<script src="js/vue.min.js"></script>

<script>
  new Vue({
    el: "#app",
    data() {
   return {
     username:""
   }
    }
  })

</script>



</body>
</html>