<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>computed计算属性</title>
</head>
<body>
<div id="app">
<input type="text" v-model='text'>
<br>
<span >{{toUp}}</span>
</div>
<script src="../node_modules/vue/dist/vue.js"></script>
<script>
let vm = new Vue({
el: "#app",
data: {
text:''
},
computed:{
toUp(){
return 'eric' + this.text
}
}
});
</script>
</body>
</html>
