生成头部信息
缩写：a:link <a href="http://"></a>
缩写：link:css <link rel="stylesheet" href="style.css" />
缩写：link:favicon <link rel="shortcut icon" type="image/x-icon" href="favicon.ico">
缩写：meta:utf <meta http-equiv="Content-Type" content="text/html;charset=UTF-8">
缩写：meta:vp <meta name="viewport" content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0">
缩写：style <style></style>
缩写：script <script></script>
缩写：script:src <script src=""></script>
缩写：img <img src="" alt="">
缩写：iframe <iframe src="" frameborder="0"></iframe>
缩写：form:get <form action="" method="get"></form>
缩写：form:post <form action="" method="post"></form>
缩写：input:hidden 别名：input[type=hidden name] <input type="hidden" name="">
hidden|h text|t search email url password|p datetime date datetime-local
checkbox radio submit|s image|i button|b reset
缩写：select <select name="" id=""></select> 缩写：option <option value=""></option>
缩写：textarea <textarea name="" id="" cols="30" rows="10"></textarea>
缩写：html:xml <html xmlns="http://www.w3.org/1999/xhtml"></html>
缩写：ifr 别名：iframe <iframe src="" frameborder="0"></iframe>
