HTML骨架结构_html/css_WEB-ITnose
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2022-05-16 21:31:05
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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】
| 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> 【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，</p> <title>都是必须的 <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"> </p> <pre class="precsshui"><base href="http://baidu.com" target="_blank"></pre> <p> </p> <p> 【3】link标签</p> <p> 【a】引入图标</p> <p class="sycode"> </p> <pre class="precsshui"><link rel="shortcut icon" href="ico.ico"></pre> <p> 【b】引入外部CSS样式表 </p> <p class="sycode"> </p> <pre class="precsshui"><link rel="stylesheet" type="text/css" href="mystyle.css"></pre> <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"> </p> <pre class="precsshui"><style> body{background-color: red;}</style></pre> <p> 【b】引入javascript </p> <p class="sycode"> </p> <pre class="precsshui">document.onclick = function(){ alert('hello world;')}</pre> <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"> </p> <pre class="precsshui"><meta charset="utf-8"></pre> <p> 【b】SEO常用到的关键词keywords和描述description</p> <p class="sycode"> </p> <pre class="precsshui"><meta name="description" content="Free Web tutorials on HTML, CSS, JavaScript"><meta name="keywords" content="HTML, CSS, XML"></pre> <p> 【c】作者、版权</p> <p class="sycode"> </p> <pre class="precsshui"><meta name="author" content="littlematch"><meta name="copyright" content=""></pre> <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"> </p> <pre class="precsshui"><meta http-equiv="refresh" content="5"><meta http-equiv="refresh" content="5;url=http://www.baidu.com"></pre> <p> 【e】期限(指定网页在缓存中的过期时间)</p> <p class="sycode"> </p> <pre class="precsshui"><meta http-equiv="Expires" content="0"><meta http-equiv="Expires" content="Sat Nov 28 2015 21:19:15 GMT+0800"></pre> <p> 【f】缓存</p> <p class="sycode"> </p> <pre class="precsshui"><meta http-equiv="Pragma" content="No-cach">(禁止缓存，访问者无法脱机浏览)</pre> <p> 【g】cookie</p> <p class="sycode"> </p> <pre class="precsshui"><meta http-equiv="Set-Cookie" content="cookievalue=xxx; expires=Sat Nov 28 2015 21:19:15 GMT+0800; path=/"></pre> <p> 【h】viewport:视口，移动端常用</p> <p class="sycode"> </p> <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"></pre> <p> </p> <h2>文档主体</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"> </p> <pre class="precsshui"><h1><h2><h3><h4><h5><h6></h6></h5></h4></h3></h2></h1><p><a target="_blank" rel="nofollow" href="/default/index/url?u=aHR0cHM6Ly93d3cucGhwLmNu"><img onerror="this.src='/statics/superweb999/images/image_error.jpg'"src="/default/index/img?u=" alt="HTML骨架结构_html/css_WEB-ITnose" title="HTML骨架结构_html/css_WEB-ITnose"><strong><em><br><hr> <ul></ul> <ol><li><dl> <dt></dt> <dd><section><header><meta http-equiv="Content-Type" content="text/html;charset=UTF-8"> <footer><nav><article><aside><time><table> <thead></thead> <tbody> <caption></caption> <tr> <th></th> <td><form> <input><textarea><button><select><option><label> <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</p> <a href="/default/index/url?u=aHR0cHM6Ly93d3cucGhwLmNuL2suaHRtbD90PTI=" target="_blank" rel="nofollow"><img onerror="this.src='/statics/superweb999/images/image_error.jpg'"src="/default/index/img?u=aHR0cHM6Ly9pbWcucGhwLmNuL3VwbG9hZC9jb3Vyc2UvMDAwLzAwMC8wNzEvNjIwYzYwNGY3NTI1MTk5NS5wbmc=" style="margin-top: 30px;" alt="HTML骨架结构_html/css_WEB-ITnose" title="HTML骨架结构_html/css_WEB-ITnose"></a><p style="float:right;font-size:13px;color:#999;"><span class="red">声明：</span>本文内容由网友自发贡献，版权归原作者所有，本站不承担相应法律责任。如您发现有涉嫌抄袭侵权的内容，请联系admin@php.cn核实处理。</p> <p class="article-relative-header">相关文章</p> <p class="article-relative-header">相关视频</p> <hr class="layui-clear"> <ul class="article-relative-ul"> <li> <span class="layui-badge-dots"></span><a class="relevant" href="/default/index/url?u=aHR0cHM6Ly93d3cucGhwLmNuL2Rpdi10dXRvcmlhbC00ODc5NjIuaHRtbA==" target="_blank" rel="nofollow">html下拉菜单文字怎么变小</a> </li> <li> <span class="layui-badge-dots"></span><a 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