console 命令行工具 X clear

console

var app = new Vue({ 
    el: '#app',
    data: {
        message: 'Hello Vue!'
    }
});

<html>
    <head>
        <link rel="stylesheet" href="index.css">
        <script src="https://cdn.jsdelivr.net/npm/vue/dist/vue.js"></script>
    </head>
    <body>
        
        <div id="app">
            {{ message }}
        </div>
        
        <script src="index.js"></script>
    </body>
</html>

html, body {
    margin: 5px;
    padding: 0;
}