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如何理解html

理解HTML（超文本标记语言）是学习网页设计和开发的基础，下面是关于如何理解HTML的详细解释，使用小标题和单元表格来组织信息：

1. HTML是什么？

HTML是一种用于创建网页的标准标记语言，它使用一系列标签来定义网页的结构和内容，并告诉浏览器如何显示这些内容。

2. HTML的基本结构

HTML文档由三个主要部分组成：

：声明文档类型为HTML5。

：包含整个HTML文档的内容。

：包含有关文档的元数据，如标题、字符集等。

：包含可见的网页内容，如文本、图像、链接等。

3. HTML标签

HTML使用标签来定义不同的元素和其属性，标签由尖括号包围，例如

表示段落，表示图像等，标签可以嵌套在其他标签中，以创建更复杂的结构。

以下是一些常用的HTML标签及其功能：

标签功能
定义HTML文档
包含文档的元数据
</code></td><td>定义文档的标题</td></tr><tr><td><code><body></code></td><td>包含可见的网页内容</td></tr><tr><td><code></p><h1></code> <code></p><h6></code></td><td>定义不同级别的标题</td></tr><tr><td><code></p><p></code></td><td>定义段落</td></tr><tr><td><code><a></code></td><td>定义超链接</td></tr><tr><td><code><img></code></td><td>插入图像</td></tr><tr><td><code></p><ul></code></td><td>定义无序列表</td></tr><tr><td><code></p><ol></code></td><td>定义有序列表</td></tr><tr><td><code></p><li></code></td><td>定义列表项</td></tr><tr><td><code></p><table></code></td><td>定义表格</td></tr><tr><td><code></p><tr></code></td><td>定义表格行</td></tr><tr><td><code></p><td></code></td><td>定义表格单元格</td></tr><tr><td><code></p><th></code></td><td>定义表头单元格</td></tr><tr><td><code></p><form></code></td><td>定义表单</td></tr><tr><td><code><input></code></td><td>定义输入字段</td></tr><tr><td><code><button></code></td><td>定义按钮</td></tr><tr><td><code><label></code></td><td>定义表单标签</td></tr><tr><td><code><select></code></td><td>定义下拉列表</td></tr><tr><td><code><option></code></td><td>定义下拉列表选项</td></tr></tbody></table><p>4. HTML属性</p><p>HTML标签还可以包含属性，用于提供额外的信息或样式，属性通常在标签的开始标签中指定，并以键值对的形式出现。<code>src</code>属性指定图像的路径，<code>alt</code>属性提供图像的描述等。</p><p>以下是一些常用的HTML属性及其功能：</p><table><tbody><tr><td>属性名</td><td>功能</td></tr><tr><td><code>src</code></td><td>指定图像、音频或视频的来源路径</td></tr><tr><td><code>alt</code></td><td>提供图像的描述（对于无法显示图像的情况）</td></tr><tr><td><code>href</code></td><td>指定超链接的目标URL</td></tr><tr><td><code>target</code></td><td>指定超链接在何处打开（新窗口或当前窗口）</td></tr><tr><td><code>id</code></td><td>为元素分配唯一的标识符，以便通过JavaScript或CSS进行操作</td></tr><tr><td><code>class</code></td><td>为元素分配一个或多个类名，以便应用样式或通过JavaScript进行操作</td></tr><tr><td><code>style</code></td><td>内联样式，直接在元素上应用CSS样式</td></tr><tr><td><code>disabled</code></td><td>禁用表单元素（如按钮、输入字段等）</td></tr><tr><td><code>checked</code></td><td>预选复选框或单选按钮</td></tr></tbody></table><p>5. HTML语义化</p><p>HTML语义化是指使用适当的HTML标签和属性来描述网页内容的结构和含义，这样做有助于搜索引擎更好地理解和索引网页，同时也提高了网页的可访问性和可维护性，使用<code><header></code>、<code>nav></code>、<code>main></code>、<code>article></code>、<code>section></code>、<code>aside></code>和`footer></p> <br> 网页标题：如何理解html <br> URL标题：<a href="http://www.jxjierui.cn/article/ccojsij.html">http://www.jxjierui.cn/article/ccojsij.html</a> </div> <div class="hot_new"> <div class="page_title clearfix"> <h3>其他资讯</h3> </div> <div class="news_list clearfix"> <ul> <li> <a href="/article/cocieig.html">阿里主机部署主机的方法步骤</a> </li><li> <a href="/article/cociees.html">美国服务器防御大揭秘：掌握这些措施，打造安全无忧的网络环境</a> </li><li> <a href="/article/cocieie.html">把握5条小技巧，成功降低独立站跳出率</a> </li><li> <a href="/article/cociedp.html">python如何转换进制字符串</a> </li><li> <a href="/article/cociedi.html">帝国cms适合建什么站点</a> </li> </ul> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> <!-- 底部信息 --> <div class="footer wow fadeInUp"> <div class="rowFluid"> <div class="span12"> <div class="container"> <div class="footer_content"> <div class="span4 col-xm-12"> <div class="footer_list"> <div class="span6"> <div class="bottom_logo"><img src="/Public/Home/images/ewm.jpg" alt="微信服务号二维码" /></div> </div> <div class="span6 col-xm-12"> <div class="quick_navigation"> <div class="quick_navigation_title">快速导航</div> <ul> <li><a href="http://www.xuridl.com/" title="成都珀金斯发电机" target="_blank">成都珀金斯发电机</a></li><li><a href="http://www.cdfdjzxs.com/" title="成都发电机销售" target="_blank">成都发电机销售</a></li><li><a href="http://m.xwcx.net/phone/" title="做手机网站" target="_blank">做手机网站</a></li><li><a href="http://www.hongyifilm.cn/" title="鸿艺文化" target="_blank">鸿艺文化</a></li><li><a href="http://www.cxjshr.com/" title="衣柜书柜酒柜定制" target="_blank">衣柜书柜酒柜定制</a></li><li><a href="http://m.xwcx.net/" title="响应式网站" target="_blank">响应式网站</a></li><li><a href="http://www.sczitong.com/" title="彩乐斯贸易" target="_blank">彩乐斯贸易</a></li> </ul> </div> </div> </div> </div> <div class="span4 col-xm-6 col-xs-12"> <div class="footer_list"> <div class="footer_link"> <div class="footer_link_title">友情链接</div> <ul id="frientLinks"> <a href="https://www.cdcxhl.com/" title="网站制作" target="_blank">网站制作</a> <a href="https://www.cdcxhl.com/" title="网站建设" target="_blank">网站建设</a> <a href="https://www.cdxwcx.com/tuiguang/" title="成都网络推广" target="_blank">网络推广</a> <a href="http://seo.cdkjz.cn/" title="成都网站推广" target="_blank">网站推广</a> <a href="https://www.cdcxhl.com/xiaochengx.html" title="成都微信小程序开发" target="_blank">小程序开发</a> <a href="https://www.cdcxhl.com/menu.html" title="创新互联网站栏目导航" target="_blank">网站导航</a> </ul> <div class="footer_link_title">网站建设</div> <ul id="frientLinks"> <li><a href="/">内江浩晨众云建站</a></li> <li><a href="https://www.cdcxhl.com/menu.html" title="创新互联网站栏目导航" target="_blank">网站导航</a></li> </ul> </div> </div> </div> <div class="span4 col-xm-6 col-xs-12"> <div class="footer_list"> <div class="footer_cotact"> <div class="footer_cotact_title">联系方式</div> <ul> <li><span class="footer_cotact_type">企业：</span><span class="footer_cotact_content">青羊区浩晨众云设计工作室（个体工商户）</span></li> <li><span class="footer_cotact_type">地址：</span><span class="footer_cotact_content">成都市青羊区太升南路288号</span></li> <li><span class="footer_cotact_type">电话：</span><span class="footer_cotact_content"><a href="tel:18980820575" class="call">18980820575</a></span></li> <li><span class="footer_cotact_type">网址：</span><span class="footer_cotact_content"><a href="/" title="内江网站建设">www.jxjierui.cn</a></span></li> </ul> </div> </div> </div> </div> </div> <div class="copyright"> <p>公司名称：青羊区浩晨众云设计工作室（个体工商户） 联系电话：18980820575</p> <p><a href="http://beian.miit.gov.cn" target="_blank" rel="nofollow">网站备案号：蜀ICP备2025119795号-2</a></p> <p>内江浩晨众云建站 内江网站建设 内江网站设计 内江网站制作 <a href="http://www.cdxwcx.cn/" target="_blank">成都做网站</a></p> </div> </div> </div> </div> </body> </html> <script> $(".technical_support_box_z_info_box img").each(function(){ var src = $(this).attr("src"); //获取图片地址 var str=new RegExp("http"); var result=str.test(src); if(result==false){ var url = "https://www.cdcxhl.com"+src; //绝对路径 $(this).attr("src",url); } }); window.onload=function(){ document.oncontextmenu=function(){ return false; } } </script><div id="think_page_trace" style="position: fixed;bottom:0;right:0;font-size:14px;width:100%;z-index: 999999;color: #000;text-align:left;font-family:'微软雅黑';"> <div id="think_page_trace_tab" style="display: none;background:white;margin:0;height: 250px;"> <div id="think_page_trace_tab_tit" style="height:30px;padding: 6px 12px 0;border-bottom:1px solid #ececec;border-top:1px solid #ececec;font-size:16px"> <span style="color:#000;padding-right:12px;height:30px;line-height: 30px;display:inline-block;margin-right:3px;cursor: pointer;font-weight:700">基本</span> <span style="color:#000;padding-right:12px;height:30px;line-height: 30px;display:inline-block;margin-right:3px;cursor: pointer;font-weight:700">文件</span> <span style="color:#000;padding-right:12px;height:30px;line-height: 30px;display:inline-block;margin-right:3px;cursor: pointer;font-weight:700">流程</span> <span style="color:#000;padding-right:12px;height:30px;line-height: 30px;display:inline-block;margin-right:3px;cursor: pointer;font-weight:700">错误</span> <span style="color:#000;padding-right:12px;height:30px;line-height: 30px;display:inline-block;margin-right:3px;cursor: pointer;font-weight:700">SQL</span> <span style="color:#000;padding-right:12px;height:30px;line-height: 30px;display:inline-block;margin-right:3px;cursor: pointer;font-weight:700">调试</span> </div> <div id="think_page_trace_tab_cont" style="overflow:auto;height:212px;padding: 0; line-height: 24px"> <div style="display:none;"> <ol style="padding: 0; margin:0"> <li style="border-bottom:1px solid #EEE;font-size:14px;padding:0 12px">请求信息 : 2026-02-22 12:37:01 HTTP/1.1 GET : /article/ccojsij.html</li><li style="border-bottom:1px solid #EEE;font-size:14px;padding:0 12px">运行时间 : 0.0706s ( Load:0.0050s Init:0.0007s Exec:0.0586s Template:0.0063s )</li><li style="border-bottom:1px solid #EEE;font-size:14px;padding:0 12px">吞吐率 : 14.16req/s</li><li style="border-bottom:1px solid #EEE;font-size:14px;padding:0 12px">内存开销 : 2,215.31 kb</li><li style="border-bottom:1px solid #EEE;font-size:14px;padding:0 12px">查询信息 : 12 queries 5 writes </li><li style="border-bottom:1px solid #EEE;font-size:14px;padding:0 12px">文件加载 : 36</li><li style="border-bottom:1px solid #EEE;font-size:14px;padding:0 12px">缓存信息 : 0 gets 2 writes </li><li style="border-bottom:1px solid #EEE;font-size:14px;padding:0 12px">配置加载 : 130</li><li style="border-bottom:1px solid #EEE;font-size:14px;padding:0 12px">会话信息 : SESSION_ID=5t5dcephgnovnc4g5bhltv5555</li> </ol> </div> <div style="display:none;"> <ol style="padding: 0; margin:0"> <li style="border-bottom:1px solid #EEE;font-size:14px;padding:0 12px">/home/wwwroot/jxjierui.cn/index.php ( 1.12 KB )</li><li style="border-bottom:1px solid #EEE;font-size:14px;padding:0 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style="border-bottom:1px solid #EEE;font-size:14px;padding:0 12px">/home/wwwroot/jxjierui.cn/ThinkPHP/Library/Think/App.class.php ( 13.49 KB )</li><li style="border-bottom:1px solid #EEE;font-size:14px;padding:0 12px">/home/wwwroot/jxjierui.cn/ThinkPHP/Library/Think/Dispatcher.class.php ( 14.79 KB )</li><li style="border-bottom:1px solid #EEE;font-size:14px;padding:0 12px">/home/wwwroot/jxjierui.cn/ThinkPHP/Library/Think/Route.class.php ( 13.36 KB )</li><li style="border-bottom:1px solid #EEE;font-size:14px;padding:0 12px">/home/wwwroot/jxjierui.cn/ThinkPHP/Library/Think/Controller.class.php ( 11.23 KB )</li><li style="border-bottom:1px solid #EEE;font-size:14px;padding:0 12px">/home/wwwroot/jxjierui.cn/ThinkPHP/Library/Think/View.class.php ( 7.59 KB )</li><li style="border-bottom:1px solid #EEE;font-size:14px;padding:0 12px">/home/wwwroot/jxjierui.cn/ThinkPHP/Library/Behavior/BuildLiteBehavior.class.php ( 3.68 KB )</li><li style="border-bottom:1px solid #EEE;font-size:14px;padding:0 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12px">/home/wwwroot/jxjierui.cn/App/Runtime/Cache/Home/7540f392f42b28b481b30614275e4e55.php ( 13.96 KB )</li><li style="border-bottom:1px solid #EEE;font-size:14px;padding:0 12px">/home/wwwroot/jxjierui.cn/ThinkPHP/Library/Behavior/WriteHtmlCacheBehavior.class.php ( 0.97 KB )</li><li style="border-bottom:1px solid #EEE;font-size:14px;padding:0 12px">/home/wwwroot/jxjierui.cn/ThinkPHP/Library/Behavior/ShowPageTraceBehavior.class.php ( 5.24 KB )</li> </ol> </div> <div style="display:none;"> <ol style="padding: 0; margin:0"> <li style="border-bottom:1px solid #EEE;font-size:14px;padding:0 12px">[ app_init ] --START--</li><li style="border-bottom:1px solid #EEE;font-size:14px;padding:0 12px">Run Behavior\BuildLiteBehavior [ RunTime:0.000006s ]</li><li style="border-bottom:1px solid #EEE;font-size:14px;padding:0 12px">[ app_init ] --END-- [ RunTime:0.000036s ]</li><li style="border-bottom:1px solid #EEE;font-size:14px;padding:0 12px">[ app_begin ] --START--</li><li style="border-bottom:1px solid #EEE;font-size:14px;padding:0 12px">Run Behavior\ReadHtmlCacheBehavior [ RunTime:0.000165s ]</li><li style="border-bottom:1px solid #EEE;font-size:14px;padding:0 12px">[ app_begin ] --END-- [ RunTime:0.000185s ]</li><li style="border-bottom:1px solid #EEE;font-size:14px;padding:0 12px">[ view_parse ] --START--</li><li style="border-bottom:1px solid #EEE;font-size:14px;padding:0 12px">[ template_filter ] --START--</li><li style="border-bottom:1px solid #EEE;font-size:14px;padding:0 12px">Run Behavior\ContentReplaceBehavior [ RunTime:0.000065s ]</li><li style="border-bottom:1px solid #EEE;font-size:14px;padding:0 12px">[ template_filter ] --END-- [ RunTime:0.000088s ]</li><li style="border-bottom:1px solid #EEE;font-size:14px;padding:0 12px">Run Behavior\ParseTemplateBehavior [ RunTime:0.005047s ]</li><li style="border-bottom:1px solid #EEE;font-size:14px;padding:0 12px">[ view_parse ] --END-- [ RunTime:0.005070s ]</li><li style="border-bottom:1px solid #EEE;font-size:14px;padding:0 12px">[ view_filter ] --START--</li><li style="border-bottom:1px solid #EEE;font-size:14px;padding:0 12px">Run Behavior\WriteHtmlCacheBehavior [ RunTime:0.000072s ]</li><li style="border-bottom:1px solid #EEE;font-size:14px;padding:0 12px">[ view_filter ] --END-- [ RunTime:0.000090s ]</li><li style="border-bottom:1px solid #EEE;font-size:14px;padding:0 12px">[ app_end ] --START--</li> </ol> </div> <div style="display:none;"> <ol style="padding: 0; margin:0"> <li style="border-bottom:1px solid #EEE;font-size:14px;padding:0 12px">1064:You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ') LIMIT 1' at line 1 [ SQL语句 ] : SELECT `id`,`pid`,`navname` FROM `cx_nav` WHERE ( id= ) LIMIT 1 </li><li style="border-bottom:1px solid #EEE;font-size:14px;padding:0 12px">1064:You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ') LIMIT 1' at line 1 [ SQL语句 ] : SELECT `id`,`navname` FROM `cx_nav` WHERE ( id= ) LIMIT 1 </li><li style="border-bottom:1px solid #EEE;font-size:14px;padding:0 12px">1064:You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ')' at line 1 [ SQL语句 ] : SELECT `id`,`navname` FROM `cx_nav` WHERE ( pid= ) </li><li style="border-bottom:1px solid #EEE;font-size:14px;padding:0 12px">[8] Undefined index: pid /home/wwwroot/jxjierui.cn/App/Home/Controller/ArticleController.class.php 第 47 行.</li><li style="border-bottom:1px solid #EEE;font-size:14px;padding:0 12px">[2] file_put_contents(./App/Runtime/Temp/cfdaab04db26be6eb6fb3a078f2cfbef.php): failed to open stream: Permission denied /home/wwwroot/jxjierui.cn/ThinkPHP/Library/Think/Cache/Driver/File.class.php 第 132 行.</li><li style="border-bottom:1px solid #EEE;font-size:14px;padding:0 12px">[8] Undefined index: db_host /home/wwwroot/jxjierui.cn/ThinkPHP/Library/Think/Db.class.php 第 120 行.</li><li style="border-bottom:1px solid #EEE;font-size:14px;padding:0 12px">[8] Undefined index: db_port /home/wwwroot/jxjierui.cn/ThinkPHP/Library/Think/Db.class.php 第 121 行.</li><li style="border-bottom:1px solid #EEE;font-size:14px;padding:0 12px">[8] Undefined index: db_name /home/wwwroot/jxjierui.cn/ThinkPHP/Library/Think/Db.class.php 第 122 行.</li><li style="border-bottom:1px solid #EEE;font-size:14px;padding:0 12px">[2] file_put_contents(./App/Runtime/Temp/704c44db54bb900f32b4aecfe44839f2.php): failed to open stream: Permission denied /home/wwwroot/jxjierui.cn/ThinkPHP/Library/Think/Cache/Driver/File.class.php 第 132 行.</li> </ol> </div> <div style="display:none;"> <ol style="padding: 0; margin:0"> </ol> </div> <div style="display:none;"> <ol style="padding: 0; margin:0"> </ol> </div> </div> </div> <div id="think_page_trace_close" style="display:none;text-align:right;height:15px;position:absolute;top:10px;right:12px;cursor: pointer;"><img style="vertical-align:top;" 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3ukcXd5s7LvLD3me61WkuTCpJzYAyRurMB44EdEJzTfU271lUJC03YjXJXzYOGZwN4D8eB5jlfLrdWfzGRW7icMPfiSO6Oe7s20bmhdgLX4Z23B+s3JgQESzUDiMboSzDMHFpNMwccGePauhfwjzwnI2wu9zKGgEFg80jcZ7MHllk07s1H+5yojtUQTlH4nFdLKTGwDmPbIklOb1L1zO4T6N8NCuDLFLS/C63c0eNRimZ++s5BMBHxU11jHchI9oFVUxRh/eMDzHEzGYu0Lg8gJ7oS/tFCwoic44fyUtix0n/46vP4bf+//BRgAYwDDar4ncHIAAAAASUVORK5CYII="></div> 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