SOURCE

console 命令行工具 X clear

                    
>
console
<!DOCUMENT html>
<html>
    <head>
        <meta charset="utf-8">
        <title>练习看看好用吗?</title>
        <style>
            div{
                height:100px;
                width:100px;
                background-color:red;
                color:green;
                font-size:20px;
                margin-top:0px;
                margin-left:0px;
                }
            h1{
                background-color:green;
                margin-top:0px;
            }
            body{
                background-color:orange;
                
            }
            head{
                
            }
        </style>
    </head>
    <body>
        <h1>这是第一个标题!!!</h1>
        <div>你好你好</div>
    </body>
</html>