<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>表单绑定</title>
</head>
<body>
    <div id="app">
        <textarea name="" id="" cols="30" rows="10" v-model="comment" placeholder="输入你的留言"></textarea>
        <p>你的留言是</p>
        <p style="white-space: pre-line">{{comment}}</p>
    </div>

    <script src="../js/vue.js"></script>

    <script>
        let vm = new Vue({
            el:'#app',
            data:{
                comment:''
            }
        });
    </script>
</body>
</html>