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HTML骨架结构_html/css_WEB-ITnose

时间:2021-07-01 10:21:17 帮助过:1人阅读

目录

[1]文档结构 [2]文档声明 [3]文档头部 [4]文档主体

文档结构

  一个完整的HTML文档必须包含3个部分:文档声明、文档头部和文档主体。

  【最简单的文档结构】

        Document    

  【复杂的文档结构】

        Document                     

文档声明

  告诉浏览器以哪个标准来解析HTML文档

    [注意]必须首行、顶格,对大小写不敏感

  【HTML版本】

版本 年份
HTML 1991
HTML+ 1993
HTML 2.0 1995
HTML 3.2 1996
HTML 4.01 1999
XHTML 1.0 2000
HTML5 2014

  【常用声明】

  【1】HTML5

    

  【2】在HTML5之前,文档声明一般有三种类型:严格型strict、过渡型transitional、框架frameset

    【a】HTML4.01

        

    【b】XHTML1.0

        

    【c】XHTML1.1 等同于XHTML1.0 Strict

    

文档头部

  描述了文档的一些基本的属性和信息(可以呈现的是title和icon)

   【1】文档标题</p> <p>     【作用】<br />       【a】定义浏览器工具栏中的标题<br />       【b】提供页面被添加到收藏夹时显示的标题<br />       【c】显示在搜索引擎结果中的页面标题</p> <p>        [注意]在所有HTML文档中,<title>都是必须的</p> <p> </p> <p>   【2】base标签</p> <p>      为页面上所有链接规定默认地址和默认打开方式</p> <p class="sycode"> <pre class="precsshui"><base href="http://baidu.com" target="_blank"></script></pre> </p> <p>  </p> <p>  【3】link标签</p> <p>    【a】引入图标</p> <p class="sycode"> <pre class="precsshui"></script></pre> </p> <p>    【b】引入外部CSS样式表 </p> <p class="sycode"> <pre class="precsshui"></script></pre> </p> <p> </p> <p>  【4】style标签和script标签</p> <p>    【a】引入内部CSS样式</p> <p class="sycode"> <pre class="precsshui"><style>  body{background-color: red;}</style></script></pre> </p> <p>    【b】引入javascript </p> <p class="sycode"> <pre class="precsshui">document.onclick = function(){  alert('hello world;')}</script></pre> </p> <p> </p> <p>  【5】meta标签</p> <p>    【a】字符编码,文档的编码一定要与文件本身的编码保持一致,否则会出现乱码,推荐使用UTF-8编码</p> <p class="sycode"> <pre class="precsshui"><meta charset="utf-8"/></script></pre> </p> <p>    【b】SEO常用到的关键词keywords和描述description</p> <p class="sycode"> <pre class="precsshui"><meta name="description" content="Free Web tutorials on HTML, CSS, JavaScript" /><meta name="keywords" content="HTML, CSS, XML" /></script></pre> </p> <p>    【c】作者、版权</p> <p class="sycode"> <pre class="precsshui"><meta name="author" content="littlematch"><meta name="copyright" content=""></script></pre> </p> <p>    【d】定时跳转(让网页多少秒刷新,或跳转到其他网页)</p> <p class="sycode"> <pre class="precsshui"><meta http-equiv="refresh" content="5"><meta http-equiv="refresh" content="5;url=http://www.baidu.com"></script></pre> </p> <p>    【e】期限(指定网页在缓存中的过期时间)</p> <p class="sycode"> <pre class="precsshui"><meta http-equiv="Expires" Content="0"><meta http-equiv="Expires" Content="Sat Nov 28 2015 21:19:15 GMT+0800"> </script></pre> </p> <p>    【f】缓存</p> <p class="sycode"> <pre class="precsshui"><meta http-equiv="Pragma" Content="No-cach">(禁止缓存,访问者无法脱机浏览)</script></pre> </p> <p>    【g】cookie</p> <p class="sycode"> <pre class="precsshui"><meta http-equiv="Set-Cookie" Content="cookievalue=xxx; expires=Sat Nov 28 2015 21:19:15 GMT+0800; path=/"></script></pre> </p> <p>    【h】viewport:视口,移动端常用</p> <p class="sycode"> <pre class="precsshui"><meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0, user-scalable=no" /></script></pre> </p> <p> </p> <h2>文档主体<body></h2> <p>  真正可以在页面上看到的内容</p> <p>   【常用标签】</p> <p class="sycode"> <pre class="precsshui"><h2><h2><h3><h4><h5><h6><p><img><strong><em><br><hr><ul><ol><li><dl><dt><dd><section><header><footer><nav><time><table><thead><tbody><caption><tr><th><td><form><input><textarea><button><select><option><label></script></pre> </p> <p>    [注意]在HTML5标准下,哪些标签可以使用,哪些标签不可以使用,请移步HTML元素和有效的DTD </div> <div class=""> <ul class="m-news-opt fix"> <li class="opt-item"> <a href='/htmldaima-268802.html' target='_blank'><p>< 上一篇</p><p 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