console 命令行工具 X clear

console

console.log("hello world")

<html>
    <head>
        <title>JavaScript学习测试</title>
        <style type="text/css">
            html, body {
                color: #FFF;
            }
        </style>
    </head>
    <body>
        <h1>JavaScript学习测试</h1>
    </body>
</html>