console 命令行工具 X clear
console
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>Vue 测试实例 - 菜鸟教程(runoob.com)</title>
<script src="https://cdn.staticfile.org/vue/2.2.2/vue.min.js"></script>
</head>
<body>
    <div id="app">
        {{message.split('').reverse().join('')}}
    </div>
    <script>
        new Vue({
            el:'#app',
            data:{
                message:'Runoob!'
            }
        })
    </script>
</body>
</html>