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首页 web前端 前端问答 HTML5包含哪两种标签

HTML5包含哪两种标签

青灯夜游
青灯夜游
Jul 29, 2022 pm 05:03 PM
html5

HTML5的两种标签：1、双标签，是指由开始和结束两个标签符号组成的标签，语法“<标签名>内容</标签名>”；常见双标签有html、head、body、body、body、div、p。2、单标签，是指用一个标签符号即可完整的描述某个功能的标签，语法“<标签名 />”；常见单标签有br、hr、img、input、link、meta。

HTML5包含哪两种标签

本教程操作环境：windows7系统、HTML5版、Dell G3电脑。

超文本标记语言（外国语简称：HTML）标记标签通常被称为HTML标签，HTML标签是HTML语言中最基本的单位，HTML标签是HTML（标准通用标记语言下的一个应用）最重要的组成部分。

HTML标签是由尖括号包围的关键词，比如 <html>。

根据标签的组成特点，通常将HTML标签分为两大类，分别是“双标签”、“单标签”，对它们的具体介绍如下。

1、双标签

双标签也被称为“体标签”，是指由开始和结束两个标签符号组成的标签（开始和结束标签也被称为开放标签和闭合标签）。双标签的基本语法格式如下。、

<标签名>内容</标签名>
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例如，前面文档结构中的<html>和、和等都属于双标签。

html5常见双标记

标签类别常见标签
双标签<html>（定义HTML文档）、（定义文档头部）、（定义文档标题）、<body>、<table>、<tr>、<td>、<span>、<p>、<form>、<h1>、<h2>、<h3>、<h4>、<h5>、<h6>、<object>、<style>、<b>、<u>、<strong>、<i>、<div>、<a>、<script>、<center></td></tr></tbody></table><p><strong style="font-size: 18px;">2、单标签</strong><br/></p><p>单标签也被称为“空标签”，是指用一个标签符号即可完整的描述某个功能的标签</p><ul style="list-style-type: disc;"><li><p>因为它们是没有内容的 HTML 标签元素，它们是在开始标签中就关闭的元素，不存在成对的情况。</p></li></ul><p>其基本语法格式如下。</p><div class="code" style="position:relative; padding:0px; margin:0px;"><pre class='brush:php;toolbar:false;'><标签名 /></pre><div class="contentsignin">登录后复制</div></div><p>例如，在HTML中还有一种特殊的标签——注释标签，该标签就是一种特殊功能的单标签。如果需要在HTML文档中添加一些便于阅读和理解，但又不需要显示在页面中的注释文字，就需要使用注释标签。注释标签的基本写法。</p><div class="code" style="position:relative; padding:0px; margin:0px;"><pre class='brush:php;toolbar:false;'><!-- 注释语句 --></pre><div class="contentsignin">登录后复制</div></div><p>需要注意的是，注释内容不会显示在浏览器窗口中，但是作为HTML文档内容的一部分，注释标签可以被下载到用户的计算机上，或者用户查看源代码时也可以看到注释标签。</p> <p>注：在HTML中，在空标签上使用闭标签是无效的，例如：</br>。这样的情况是无效的HTML。</p> <p><strong>html单标签有</strong></p> <ul style="list-style-type: disc;"> <li> <p><br>：可插入一个简单的换行符。</p> <p><br> 标签是空标签（意味着它没有结束标签，因此这是错误的：<br></br>）。在 XHTML 中，把结束标签放在开始标签中，也就是 <br />。<br></p> </li> <li><p><hr>：定义 HTML 页面中的主题变化（比如话题的转移），并显示为一条水平线。</p></li> <li><p><area>：定义图像映射内部的区域（图像映射指的是带有可点击区域的图像）。</p></li> <li><p><base>：为页面上的所有链接规定默认地址或默认目标。</p></li> <li><p><img>：定义 HTML 页面中的图像。</p></li> <li><p><input>：规定了用户可以在其中输入数据的输入字段。</p></li> <li><p><link>：定义文档与外部资源的关系，最常见的用途是链接样式表。</p></li> <li> <p><meta>：提供了 HTML 文档的元数据。元数据不会显示在客户端，但是会被浏览器解析。</p> <p>META元素通常用于指定网页的描述，关键词，文件的最后修改时间，作者及其他元数据。</p> <p>元数据可以被使用浏览器（如何显示内容或重新加载页面），搜索引擎（关键词），或其他 Web 服务调用。</p> </li> <li><p><basefont>：定义文档中所有文本的默认颜色、大小和字体。</p></li> <li><p><param>：允许您为插入 XHTML 文档的对象规定 run-time 设置，也就是说，此标签可为包含它的 <object> 或者 <applet> 标签提供参数。</p></li> <li><p><col>：规定了 <colgroup> 元素内部的每一列的列属性。通过使用 <col> 标签，可以向整个列应用样式，而不需要重复为每个单元格或每一行设置样式。</p></li> <li><p><frame>：定义 frameset 中的一个特定的窗口（框架）。frameset 中的每个框架都可以设置不同的属性，比如 border、scrolling、noresize 等等。</p></li> <li><p><embed>：定义了一个容器，用来嵌入外部应用或者互动程序（插件）。</p></li> <li><p><keygen>规定用于表单的密钥对生成器字段。</p></li> <li><p><source>：为媒介元素（比如 <video> 和 <audio>）定义媒介资源。</p></li> </ul> <p>【推荐课程：<a href="http://www.php.cn/course/880.html" target="_blank" textvalue="HTML5视频教程">HTML5视频教程</a>、<a href="https://www.php.cn/course/list/1.html" target="_blank" textvalue="web前端">web前端</a>】</p><p>以上是HTML5包含哪两种标签的详细内容。更多信息请关注PHP中文网其他相关文章！</p> </div> </div> <div class="wzconShengming_sp"> <div class="bzsmdiv_sp">本站声明</div> <div>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</div> </div> </div> <ins class="adsbygoogle" style="display:block" data-ad-format="autorelaxed" data-ad-client="ca-pub-5902227090019525" data-ad-slot="2507867629"></ins> <script> (adsbygoogle = window.adsbygoogle || []).push({}); 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