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03 html基础详解

02html基础详解

文章目录

  • 02html基础详解
    • 1、HTML编辑器
    • 2、标签
      • html常用标签
    • 3、元素
    • 4、属性
      • 常用属性
    • 5、标题
      • 水平线
      • 注释
    • 6、段落
      • 折行
    • 7、格式化标签
      • 属性dir
    • 8、链接
      • 属性target
      • 属性id
    • 9、头部
      • 标签head
      • 标签title
      • 标签base
      • 标签link
      • 标签style
      • 标签meta
      • script元素
    • 10、CSS
      • 背景色属性background-color
      • 字体相关属性
      • 属性text-align
      • 内部样式表
      • 外部样式表
    • 11、图像
      • 标签image
      • 源属性src
      • 属性alt
      • 属性height和width
      • 属性float
      • 属性usemap
      • 属性title(image)
      • 属性border
    • 12、标签map
    • 13、标签area
      • 属性coords
      • 属性shape
      • 属性name（map）
    • 14、表格
    • 15、列表
    • 16、区块
      • 标签div
      • 标签span
    • 17、布局
    • 18、表单
    • 19、框架
      • 标签iframe
        • 属性height
        • 属性width
        • 属性src
        • 属性frameborder
    • 20、颜色
      • 属性rgba
    • 21、脚本
      • 标签script
      • 标签noscript
    • 22、字符实体
    • 23、URL

1、HTML编辑器

html编辑器推荐：

  • VS Code：https://code.visualstudio.com/
  • 在线编辑器：https://c.runoob.com/front-end/61/

  • Notepad3：Download Notepad3 - Notepad replacement with syntax highlighting.

  • SublimeText3汉化版：http://www.php.cn/xiazai/gongju/93

我用的是Notepad3，它是一款轻便快捷的基于 Scintilla 的文本编辑器，具有语法高亮、代码折叠、括号匹配、自动缩进、编码转换、换行格式转换、多次撤销或重做、书签、基于正则表达式的查找和替换等实用功能。它占用的内存很小，但功能强大，足以处理大多数编程工作。

03 html基础详解_第1张图片

2、标签

由于html文档主要由标签组成，数不胜数，这里先列举一些常用标签。

html常用标签

定义文档类型。
定义一个 html文档
</code></td> <td>为文档定义一个标题</td> </tr> <tr> <td><code><body></code></td> <td>定义文档的主体</td> </tr> <tr> <td><code><h1>-<h6></code></td> <td>定义 html标题</td> </tr> <tr> <td><code><p></code></td> <td>定义一个段落</td> </tr> <tr> <td><code><br></code></td> <td>定义简单的折行。</td> </tr> <tr> <td><code><hr></code></td> <td>定义水平线。</td> </tr> <tr> <td><code><!--xxx--></code></td> <td>定义一个注释xxx</td> </tr> </tbody> </table> <h3>3、元素</h3> <ul> <li><strong>HTML元素以<em>开始标签</em>起始，以<em>结束标签</em>终止，元素的内容是<em>开始标签</em>与<em>结束标签</em>之间的内容。</strong> <ul> <li><code><p></code>这是一个段落。<code></p></code></li> <li><code><br></code>换行。</li> </ul> </li> <li>某些HTML元素具有空内容(empty content)，称为<strong>空元素</strong>，以开始标签终止。通过在开始标签中添加斜杠（如<code><br />, <input type="text" id="qwq"/></code>），在开始标签中进行关闭。HTML中，空标签可以没有结束标签；在XHTML中，空标签必须被正确关闭。</li> </ul> <ul> <li>大多数HTML元素可拥有<strong>属性</strong>。</li> <li>大多数HTML元素可嵌套。HTML文档由相互嵌套的 HTML元素构成。</li> <li>HTML标签大小写不敏感，但应使用小写。</li> <li>一些元素的属性（布尔属性），取值只有取或不取。如：<code><option></code>的selected属性，会被记为：<code>当selected="selected"时，执行...</code>，事实上只需在定义元素时写出该属性<code>selected</code>该属性存在（不需设定值），或为该属性定义任意值，都会执行对应操作（但注意，在XHTML中不允许使用这样的属性简写）。在JS中将其设为空（如<code>selected=""</code>）会取消该选项。使用<code>ture/false</code>也可表示开启/关闭该选项。</li> <li>许多属性会以像素或百分比作为单位，默认会以像素（只需填写数字，可省略px）为单位。属性值必须有引号。</li> </ul> <h3>4、属性</h3> <p><strong>属性是html元素提供的附加信息</strong>。由于每个标签都有不同的属性，本节内容先列举一些常用属性，其他常用属性会在介绍该属性常出现的标签时做介绍。</p> <ul> <li> <p>属性一般描述于<strong>开始标签</strong>。</p> </li> <li> <p>属性总是以名称/值对的形式出现，<strong>比如：name=“value”</strong>。</p> <p>属性实例：</p> <p>html链接由<code><a></code>标签定义。链接的地址在 <strong>href 属性</strong>中指定：</p> <pre><code class="prism language-html"><span class="token tag"><span class="token tag"><span class="token punctuation"><</span>a</span> <span class="token attr-name">href</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>https://blog.csdn.net/m0_53297256<span class="token punctuation">"</span></span><span class="token punctuation">></span></span>这是我的博客链接<span class="token tag"><span class="token tag"><span class="token punctuation"></</span>a</span><span class="token punctuation">></span></span> </code></pre> </li> <li> <p>属性和属性值对大小写不敏感。不过，新版本的 (X)html要求使用小写属性。</p> </li> </ul> <h4>常用属性</h4> <ul> <li><strong><code>value</code></strong></li> <li><strong><code>title</code></strong><br> <code>title</code>属性定义关于元素的额外信息。其定义的文本，会在鼠标移动到元素内容上时显示。许多元素都有<code>title</code>属性。 <ul> <li><code>abbr</code>,<code>acronym</code>元素必须含<code>title</code>属性，两个元素分别用于表示缩略语、首字母缩写，<code>title</code>用于表示完整的表达。</li> </ul> </li> <li><strong><code>align</code></strong><br> 设置对齐。取值为<code>left, right, center</code>。<br> 不推荐使用，应使用CSS的<code>float</code>属性，如：<code>style="float:right;"</code>（但这似乎无法居中）。</li> <li><strong><code>tagName</code></strong><br> <code>tagName</code>定义了元素的标签类型。如：<code><tr></code>元素的<code>tagName</code>为<code>"TR"</code>。</li> <li><strong>自定义属性</strong><br> 标签在声明时，可以绑定任意它不拥有的属性。但该属性不能直接通过<code>elem.attr</code>获取（会返回<code>undefined</code>），需使用<code>elem.getAttribute("attr")</code>获取（DOM），或<code>$(this).attr("attr")</code>（jQuery）。例：<br> <code>div</code>标签没有<code>name, value</code>属性，但可自定义绑定该属性：<code><div class="A" value="123"></div></code>，并通过<code>document.getElementsByClassName("A")[0].getAttribute("value")</code>或<code>$(".A").attr("value")</code>获取。<br> 属性名可任取。<br> 注意<code>getElementsByName()</code>和<code>getElementsByClassName()</code>返回的是一个<code>list</code>，<code>getElementsById()</code>返回的是拥有指定<code>id</code>的<strong>第一个对象</strong>。</li> </ul> <h3>5、标题</h3> <p><strong>HTML段落标题通过<code><h1></code> - <code><h6></code> 标签来定义</strong>。例如：</p> <p><code>源代码：</code></p> <pre><code class="prism language-html"><span class="token tag"><span class="token tag"><span class="token punctuation"><</span>h1</span><span class="token punctuation">></span></span>这是1级标题<span class="token tag"><span class="token tag"><span class="token punctuation"></</span>h1</span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>h2</span><span class="token punctuation">></span></span>这是2级标题<span class="token tag"><span class="token tag"><span class="token punctuation"></</span>h2</span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>h3</span><span class="token punctuation">></span></span>这是3级标题<span class="token tag"><span class="token tag"><span class="token punctuation"></</span>h3</span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>h4</span><span class="token punctuation">></span></span>这是4级标题<span class="token tag"><span class="token tag"><span class="token punctuation"></</span>h4</span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>h5</span><span class="token punctuation">></span></span>这是5级标题<span class="token tag"><span class="token tag"><span class="token punctuation"></</span>h5</span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>h6</span><span class="token punctuation">></span></span>这是6级标题<span class="token tag"><span class="token tag"><span class="token punctuation"></</span>h6</span><span class="token punctuation">></span></span> </code></pre> <p><code>显示效果：</code></p> <blockquote> <h2>这是1级标题</h2> <h3>这是2级标题</h3> <h4>这是3级标题</h4> <h5>这是4级标题</h5> <h6>这是5级标题</h6> <h6>这是6级标题</h6> </blockquote> <p><mark>标题相关标签：水平线、注释。</mark></p> <h4>水平线</h4> <p><code><hr></code>标签在 html页面中创建水平线。hr 元素可用于分隔内容。</p> <h4>注释</h4> <p>可以将注释插入 html代码中，这样可以提高其可读性，使代码更易被人理解。浏览器会忽略注释，也不会显示它们。</p> <p>注释写法如下:</p> <pre><code class="prism language-html"><span class="token comment"><!-- 这是一个注释 --></span> </code></pre> <h3>6、段落</h3> <p><strong>html段落是通过标签 <code><p></code> 来定义的</strong>。例如：</p> <p><code>源代码：</code></p> <pre><code class="prism language-html"><span class="token tag"><span class="token tag"><span class="token punctuation"><</span>p</span><span class="token punctuation">></span></span>这是一个段落<span class="token tag"><span class="token tag"><span class="token punctuation"></</span>p</span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>p</span><span class="token punctuation">></span></span>这是另一个段落<span class="token tag"><span class="token tag"><span class="token punctuation"></</span>p</span><span class="token punctuation">></span></span> </code></pre> <p><code>显示效果：</code></p> <blockquote> <p>这是一个段落</p> <p>这是另一个段落</p> </blockquote> <h4>折行</h4> <p><u>为了避免忘掉写结束标签的情况，可以在段落中插入<code><br></code>标签换行。</u></p> <h3>7、格式化标签</h3> <p>html使用标签 <b>(“bold”) </b>与 <i>(“italic”) </i>对输出的文本进行格式, 如：<strong>粗体</strong> or <em>斜体</em>。这些HTML标签被称为<strong>格式化标签</strong>。</p> <table> <thead> <tr> <th><code><b></code></th> <th><b>这个文本是加粗的</b></th> </tr> </thead> <tbody> <tr> <td><code><strong></code></td> <td><strong>这个文本是加粗的</strong></td> </tr> <tr> <td><code><big> </code></td> <td><big>这个文本字体放大</big></td> </tr> <tr> <td><code><em> </code></td> <td><em>这个文本是斜体的</em></td> </tr> <tr> <td><code><i> </code></td> <td><i>这个文本是斜体的</i></td> </tr> <tr> <td><code><small> </code></td> <td><small>这个文本是缩小的</small></td> </tr> <tr> <td><code><sub> </code></td> <td>这个文本包含<sub>下标</sub></td> </tr> <tr> <td><code><sup> </code></td> <td>这个文本包含<sup>上标</sup></td> </tr> <tr> <td><code><pre> </code></td> <td><pre>被包围在pre标签中的文本通常会保留空格和换行符。而文本也会呈现为等宽字体。</pre></td> </tr> <tr> <td><code><code> </code></td> <td><code>定义计算机输出。用于表示计算机源代码或者其他机器可以阅读的文本内容。包含在该标签内的文本将用等宽、类似电传打字机样式的字体（Courier）显示出来。</code></td> </tr> <tr> <td><code><kbd> </code></td> <td>定义键盘文本。以浏览器的默认monospace字体显示。该标签已废弃，不推荐使用，但是可以通过CSS实现丰富的效果。</td> </tr> <tr> <td><code><tt> </code></td> <td><tt>定义打字机文本</tt></td> </tr> <tr> <td><code><samp> </code></td> <td>定义样本文本</td> </tr> <tr> <td><code><var> </code></td> <td>定义变量。</td> </tr> <tr> <td><code><address></code></td> <td><address>定义地址文本</address></td> </tr> <tr> <td><code><abbr> </code></td> <td><abbr>表示一个缩写词或者首字母缩略词。</abbr></td> </tr> <tr> <td><code><acronym></code></td> <td>标签允许明确地声明一个字符序列，它们构成一个单词的首字母缩写或简略语。 标签已从 HTML5 中移除，不应再被使用，Web 开发者应使用 <abbr> 标签。</abbr></td> </tr> <tr> <td><code><bdo> </code></td> <td>指定文本方向。</td> </tr> <tr> <td><code><q> </code></td> <td><q>定义短的引用语,对内容文字自动加引号</q></td> </tr> <tr> <td><code><del> </code></td> <td><del>删除效果</del></td> </tr> <tr> <td><code><ins> </code></td> <td><ins>下划线效果</ins></td> </tr> <tr> <td><code><u> </code></td> <td><u>下划线效果</u></td> </tr> <tr> <td><code><cite> </code></td> <td>定义作品的<cite>标题</cite></td> </tr> <tr> <td><code><blockquote></code></td> <td>定义一个 <blockquote> 摘自另一个源的块引用 </blockquote></td> </tr> <tr> <td><code><dfn></code></td> <td>定义项目</td> </tr> </tbody> </table> <p><big><strong><code><pre></code></strong></big></p> <ul> <li><code><pre></code> 标签的一个常见应用就是用来表示计算机的源代码。</li> <li>可以导致段落断开的标签（例如标题、<code><p></code>和<code><address></code>）<em>绝不能</em>包含在 <code><pre></code> 所定义的块里。</li> </ul> <p><big><strong><code><abbr></code></strong></big></p> <p>在某些浏览器中，当您把鼠标移至缩略词语上时，title属性可用于展示表达的完整版本。例如：</p> <p><code>源代码：</code></p> <pre><code class="prism language-html"><span class="token tag"><span class="token tag"><span class="token punctuation"><</span>abbr</span> <span class="token attr-name">title</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>etcetera<span class="token punctuation">"</span></span><span class="token punctuation">></span></span>etc.<span class="token tag"><span class="token tag"><span class="token punctuation"></</span>abbr</span><span class="token punctuation">></span></span> </code></pre> <p><code>显示效果：</code></p> <blockquote> <p><abbr title="etcetera">etc.</abbr></p> </blockquote> <h4>属性dir</h4> <p><big><strong><code>dir</code></strong></big></p> <p><strong>规定 <bdo> 元素内的文本方向</bdo></strong>。dir = "ltr"从左到右；dir = "rtl"从右到左。例如：</p> <p><code>源码：</code></p> <pre><code class="prism language-html"><span class="token tag"><span class="token tag"><span class="token punctuation"><</span>p</span><span class="token punctuation">></span></span><span class="token tag"><span class="token tag"><span class="token punctuation"><</span>bdo</span> <span class="token attr-name">dir</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>rtl<span class="token punctuation">"</span></span><span class="token punctuation">></span></span>该段落文字从右到左显示。<span class="token tag"><span class="token tag"><span class="token punctuation"></</span>bdo</span><span class="token punctuation">></span></span><span class="token tag"><span class="token tag"><span class="token punctuation"></</span>p</span><span class="token punctuation">></span></span> </code></pre> <p><code>显示效果：</code></p> <blockquote> <p><bdo dir="rtl">该段落文字从右到左显示。</bdo></p> </blockquote> <h3>8、链接</h3> <p><strong>HTML 使用超级链接与网络上的另一个文档相连</strong>。几乎可以在所有的网页中找到链接。点击链接可以从一张页面跳转到另一张页面。</p> <ul> <li> <p><strong>超链接</strong>可以是一个字，一个词，或者一组词，也可以是一幅图像，您可以点击这些内容来跳转到新的文档或者当前文档中的某个部分。</p> </li> <li> <p>当您把鼠标指针移动到网页中的某个链接上时，箭头会变为一只小手。</p> </li> <li> <p>默认情况下，链接将以以下形式出现在浏览器中：</p> <ul> <li>一个未访问过的链接显示为蓝色字体并带有下划线。</li> <li>访问过的链接显示为紫色并带有下划线。</li> <li>点击链接时，链接显示为红色并带有下划线。</li> </ul> <blockquote> <p>注意：如果为这些超链接设置了 CSS 样式，展示样式会根据 CSS 的设定而显示。</p> </blockquote> </li> <li> <p><strong>html链接是通过标签 <code><a></code> 来定义的</strong>。例如：</p> <p><code>源代码：</code></p> <pre><code class="prism language-html"><span class="token tag"><span class="token tag"><span class="token punctuation"><</span>a</span> <span class="token attr-name">href</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>https://blog.csdn.net/m0_53297256<span class="token punctuation">"</span></span><span class="token punctuation">></span></span>这是我的博客链接<span class="token tag"><span class="token tag"><span class="token punctuation"></</span>a</span><span class="token punctuation">></span></span> </code></pre> <p><code>显示效果：</code></p> <blockquote> <p>这是我的博客链接</p> </blockquote> </li> </ul> <h4>属性target</h4> <p>使用 target 属性，你可以<strong>定义被链接的文档在何处显示</strong>。</p> <ul> <li>target=“_blank”, 链接将在新窗口打开</li> <li>target=“_top”，在整个窗口中打开。</li> <li>target=“_self”，在同一框架中打开。（默认）</li> <li>target=“_parent”，在副框架中打开。</li> </ul> <h4>属性id</h4> <p>id 属性可用于<strong>创建一个HTML文档书签</strong>。书签不会以任何特殊方式显示，即在 HTML 页面中是不显示的，所以对于读者来说是隐藏的。</p> <p>可以通过设置书签的名字快速找到对应的标签。</p> <h3>9、头部</h3> <h4>标签head</h4> <p><big><strong><code><head></code></strong></big><strong>元素包含了所有的头部标签元素</strong>。在<code><head></code>元素中你可以插入脚本（scripts）, 样式文件（CSS），及各种meta信息。</p> <p>可以添加在头部区域的元素标签为: , </p> <h4>标签title</h4> <p><big><strong><code><title></code></strong></big><strong>标签定义了不同文档的标题</strong>。</p> <ul> <li><code><title></code>在 HTML/XHTML文档中是必需的。</li> </ul> <h4>标签base</h4> <p><big><code><base></code></big> <strong>标签描述了基本的链接地址/链接目标</strong>，该标签作为HTML文档中所有的链接标签的默认链接。</p> <pre><code class="prism language-html"><span class="token tag"><span class="token tag"><span class="token punctuation"><</span>head</span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>base</span> <span class="token attr-name">href</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>https://blog.csdn.net/m0_53297256<span class="token punctuation">"</span></span> <span class="token attr-name">target</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>_blank<span class="token punctuation">"</span></span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"></</span>head</span><span class="token punctuation">></span></span> </code></pre> <h4>标签link</h4> <p><big><code><link></code></big> <strong>标签定义了文档与外部资源之间的关系</strong>。<code><link></code>标签通常用于链接到样式表。</p> <pre><code class="prism language-html"><span class="token tag"><span class="token tag"><span class="token punctuation"><</span>head</span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>link</span> <span class="token attr-name">rel</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>stylesheet<span class="token punctuation">"</span></span> <span class="token attr-name">type</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>text/css<span class="token punctuation">"</span></span> <span class="token attr-name">href</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>mystyle.css<span class="token punctuation">"</span></span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"></</span>head</span><span class="token punctuation">></span></span> </code></pre> <h4>标签style</h4> <p><big><code><style></code></big> <strong>标签定义了HTML文档的样式文件引用地址</strong>。在</p> <pre><code class="prism language-html"><span class="token tag"><span class="token tag"><span class="token punctuation"><</span>head</span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>style</span> <span class="token attr-name">type</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>text/css<span class="token punctuation">"</span></span><span class="token punctuation">></span></span><span class="token style"><span class="token language-css"> <span class="token selector">body</span> <span class="token punctuation">{</span> <span class="token property">background-color</span><span class="token punctuation">:</span>yellow<span class="token punctuation">;</span> <span class="token punctuation">}</span> <span class="token selector">p</span><span class="token punctuation">{</span> <span class="token property">color</span><span class="token punctuation">:</span>blue <span class="token punctuation">}</span> </span></span><span class="token tag"><span class="token tag"><span class="token punctuation"></</span>style</span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"></</span>head</span><span class="token punctuation">></span></span> </code></pre> <h4>标签meta</h4> <p><big><code><meta></code></big><strong>标签描述了一些基本的元数据</strong>。<code><meta></code>标签提供了元数据。元数据也不显示在页面上，但会被浏览器解析。</p> <ul> <li> <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，和其他元数据。</p> </li> <li> <p>元数据可以使用于浏览器（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。</p> </li> </ul> <p>meta示例：</p> <p>为搜索引擎定义关键词:</p> <pre><code><meta name="keywords" content="HTML, CSS, XML, XHTML, JavaScript"> </code></pre> <p>为网页定义描述内容:</p> <pre><code><meta name="description" content="免费 Web `& 编程 教程"> </code></pre> <p>定义网页作者:</p> <pre><code><meta name="author" content="Gbosh"> </code></pre> <p>每30秒钟刷新当前页面:</p> <pre><code><meta http-equiv="refresh" content="30"> </code></pre> <h4>script元素</h4> <p><code><script></code><strong>标签用于加载脚本文件</strong>，如： JavaScript。</p> <h3>10、CSS</h3> <p><strong>CSS(Cascading Style Sheets)用于渲染HTML元素标签的样式</strong>。</p> <p>CSS 可以通过以下方式添加到HTML中:</p> <ul> <li>内联样式-在HTML元素中使用"style" <strong>属性</strong>。</li> <li>内部样式表-在HTML文档头部<code><head></code>区域使用<code><style></code>元素来包含CSS。</li> <li>外部引用-使用外部CSS文件。</li> </ul> <p>最好的方式是通过外部引用CSS文件。</p> <h4>背景色属性background-color</h4> <p><strong>背景色属性（background-color）定义一个元素的背景颜色</strong>：</p> <pre><code class="prism language-html"><span class="token tag"><span class="token tag"><span class="token punctuation"><</span>body</span> <span class="token special-attr"><span class="token attr-name">style</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span><span class="token value css language-css"><span class="token property">background-color</span><span class="token punctuation">:</span>yellow<span class="token punctuation">;</span></span><span class="token punctuation">"</span></span></span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>h2</span> <span class="token special-attr"><span class="token attr-name">style</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span><span class="token value css language-css"><span class="token property">background-color</span><span class="token punctuation">:</span>red<span class="token punctuation">;</span></span><span class="token punctuation">"</span></span></span><span class="token punctuation">></span></span>这是一个标题<span class="token tag"><span class="token tag"><span class="token punctuation"></</span>h2</span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>p</span> <span class="token special-attr"><span class="token attr-name">style</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span><span class="token value css language-css"><span class="token property">background-color</span><span class="token punctuation">:</span>green<span class="token punctuation">;</span></span><span class="token punctuation">"</span></span></span><span class="token punctuation">></span></span>这是一个段落。<span class="token tag"><span class="token tag"><span class="token punctuation"></</span>p</span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"></</span>body</span><span class="token punctuation">></span></span> </code></pre> <h4>字体相关属性</h4> <p><strong>font-family（字体），color（颜色），和font-size（字体大小）属性来定义字体的样式</strong>。</p> <pre><code class="prism language-html"><span class="token tag"><span class="token tag"><span class="token punctuation"><</span>h1</span> <span class="token special-attr"><span class="token attr-name">style</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span><span class="token value css language-css"><span class="token property">font-family</span><span class="token punctuation">:</span>宋体<span class="token punctuation">;</span></span><span class="token punctuation">"</span></span></span><span class="token punctuation">></span></span>一个标题<span class="token tag"><span class="token tag"><span class="token punctuation"></</span>h1</span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>p</span> <span class="token special-attr"><span class="token attr-name">style</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span><span class="token value css language-css"><span class="token property">font-family</span><span class="token punctuation">:</span>arial<span class="token punctuation">;</span><span class="token property">color</span><span class="token punctuation">:</span>red<span class="token punctuation">;</span><span class="token property">font-size</span><span class="token punctuation">:</span>20rpx<span class="token punctuation">;</span></span><span class="token punctuation">"</span></span></span><span class="token punctuation">></span></span>一个段落。<span class="token tag"><span class="token tag"><span class="token punctuation"></</span>p</span><span class="token punctuation">></span></span> </code></pre> <h4>属性text-align</h4> <p><strong><code>text-align（文字对齐）</code>属性指定文本的水平与垂直对齐方式</strong>。</p> <h4>内部样式表</h4> <p>当单个文件需要特别样式时，就可以使用内部样式表。你可以在<code>head</code>部分通过<code>style</code>标签定义内部样式表</p> <h4>外部样式表</h4> <p>当样式需要被应用到很多页面的时候，外部样式表将是理想的选择。使用外部样式表，你就可以通过更改一个文件来改变整个站点的外观。</p> <h3>11、图像</h3> <h4>标签image</h4> <p><strong>html图像是通过标签 <code><img></code> 来定义的</strong>。<code><img></code>是空标签，意思是说，它只包含属性，并且没有闭合标签。</p> <h4>源属性src</h4> <p>要在页面上显示图像，你需要使用源属性（src）。src 指 “source”。源属性的值是图像的 URL 地址。URL 指存储图像的位置。浏览器将图像显示在文档中图像标签出现的地方。如果你将图像标签置于两个段落之间，那么浏览器会首先显示第一个段落，然后显示图片，最后显示第二段。</p> <h4>属性alt</h4> <p><strong><code>alt</code>属性用来为图像定义一串预备的可替换的文本</strong>。</p> <p>在浏览器无法载入图像时，替换文本属性告诉读者她们失去的信息。此时，浏览器将显示这个替代性的文本而不是图像。</p> <h4>属性height和width</h4> <p><strong><code>height</code>高度）与<code>width</code>（宽度）属性用于设置图像的高度与宽度</strong>。</p> <ul> <li>属性值默认单位为像素。</li> <li>如果没有指定图片的大小，加载页面时有可能会破坏HTML页面的整体布局。</li> </ul> <h4>属性float</h4> <p><strong><code>float</code>属性使图片浮动至元素的左边或右边</strong>。</p> <ul> <li> <p>float=“left”——浮动在元素左边。</p> </li> <li> <p>float=“right”——浮动在元素右边。</p> </li> </ul> <p>示例：</p> <p><code>源代码：</code></p> <pre><code class="prism language-html"><span class="token doctype"><span class="token punctuation"><!</span><span class="token doctype-tag">DOCTYPE</span> <span class="token name">html</span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>html</span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>title</span><span class="token punctuation">></span></span>Gbosh的博客<span class="token tag"><span class="token tag"><span class="token punctuation"></</span>title</span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>body</span><span class="token punctuation">></span></span> <img src="https://img-blog.csdnimg.cn/e32508ca8edf482b9de585a488bf48fd.png"/ alt="Gbosh的博客" height="100" width="50" style="float:left">左边是我的博客截图。 <span class="token tag"><span class="token tag"><span class="token punctuation"></</span>body</span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"></</span>html</span><span class="token punctuation">></span></span> </code></pre> <p><code>显示效果：</code></p> <blockquote> Gbosh的博客 <a href="http://img.e-com-net.com/image/info8/d81cf4047e0b48b78052ad700c80ed2c.jpg" target="_blank"><img src="http://img.e-com-net.com/image/info8/d81cf4047e0b48b78052ad700c80ed2c.jpg" alt="03 html基础详解_第2张图片" height="384" width="650" style="border:1px solid black;"></a>左边是我的博客截图。 </blockquote> <h4>属性usemap</h4> <p><strong>可以理解为通过该标签，获取映射的“函数”</strong>。该标签的值取自<code><map></code>标签的<code>id</code>属性或<code>name</code>属性。而<code><map></code>标签内容包含了映射关系。</p> <p><code><img></code>中的<code>usemap</code>属性可引用<code><map></code>中的<code>id</code>或<code>name</code>属性（取决于浏览器），所以我们应同时向<code><map></code>添加<code>id</code>和<code>name</code>属性。</p> <h4>属性title(image)</h4> <p><strong>鼠标悬停时显示的内容</strong>。</p> <h4>属性border</h4> <p><strong>设置图像边框的宽度</strong>。</p> <h3>12、标签map</h3> <p><strong>定义图像地图</strong>。</p> <h3>13、标签area</h3> <p><strong>定义图像地图中的可点击区域</strong>。</p> <ul> <li><code>area</code>元素永远嵌套在<code>map</code>元素内部。<code>area</code>元素可定义图像映射中的区域。</li> </ul> <h4>属性coords</h4> <p><strong>规定区域的 x 和 y 坐标</strong>。</p> <ul> <li><code>coords</code>属性与<code>shape</code>属性配合使用，来规定区域的尺寸、形状和位置。</li> </ul> <table> <thead> <tr> <th><em>x1,y1,x2,y2</em></th> <th>如果 shape 属性设置为 “rect”，则该值规定矩形左上角和右下角的坐标。</th> </tr> </thead> <tbody> <tr> <td><em>x,y,radius</em></td> <td>如果 shape 属性设置为 “circ”，则该值规定圆心的坐标和半径。</td> </tr> <tr> <td><em>x1,y1,x2,y2,…,xn,yn</em></td> <td>如果 shape 属性设置为 “poly”，则该值规定多边形各顶点的值。如果第一个坐标和最后一个坐标不一致，那么为了关闭多边形，浏览器必须添加最后一对坐标。</td> </tr> </tbody> </table> <h4>属性shape</h4> <p>规定区域的形状。</p> <ul> <li>rect——矩形</li> <li>circle——圆形</li> <li>poly——多边形</li> </ul> <h4>属性name（map）</h4> <p><strong>图像映射的名称</strong>。</p> <p>示例：</p> <pre><code class="prism language-html"><span class="token tag"><span class="token tag"><span class="token punctuation"><</span>img</span> <span class="token attr-name">src</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>planets.gif<span class="token punctuation">"</span></span> <span class="token attr-name">width</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>145<span class="token punctuation">"</span></span> <span class="token attr-name">height</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>126<span class="token punctuation">"</span></span> <span class="token attr-name">alt</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>Planets<span class="token punctuation">"</span></span> <span class="token attr-name">usemap</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>#planetmap<span class="token punctuation">"</span></span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>map</span> <span class="token attr-name">name</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>planetmap<span class="token punctuation">"</span></span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>area</span> <span class="token attr-name">shape</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>rect<span class="token punctuation">"</span></span> <span class="token attr-name">coords</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>0,0,82,126<span class="token punctuation">"</span></span> <span class="token attr-name">href</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>sun.htm<span class="token punctuation">"</span></span> <span class="token attr-name">alt</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>Sun<span class="token punctuation">"</span></span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>area</span> <span class="token attr-name">shape</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>circle<span class="token punctuation">"</span></span> <span class="token attr-name">coords</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>90,58,3<span class="token punctuation">"</span></span> <span class="token attr-name">href</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>mercur.htm<span class="token punctuation">"</span></span> <span class="token attr-name">alt</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>Mercury<span class="token punctuation">"</span></span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>area</span> <span class="token attr-name">shape</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>circle<span class="token punctuation">"</span></span> <span class="token attr-name">coords</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>124,58,8<span class="token punctuation">"</span></span> <span class="token attr-name">href</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>venus.htm<span class="token punctuation">"</span></span> <span class="token attr-name">alt</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>Venus<span class="token punctuation">"</span></span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"></</span>map</span><span class="token punctuation">></span></span> </code></pre> <h3>14、表格</h3> <p><a href="http://img.e-com-net.com/image/info8/bedd249f38ea46c78460fcb319ec781d.jpg" target="_blank"><img src="http://img.e-com-net.com/image/info8/bedd249f38ea46c78460fcb319ec781d.jpg" alt="03 html基础详解_第3张图片" width="622" height="476" style="border:1px solid black;"></a><br> <a href="http://img.e-com-net.com/image/info8/11d6593ae3d643c78cc5e63b32210311.jpg" target="_blank"><img src="http://img.e-com-net.com/image/info8/11d6593ae3d643c78cc5e63b32210311.jpg" alt="03 html基础详解_第4张图片" width="650" height="410" style="border:1px solid black;"></a></p> <table> <thead> <tr> <th align="center">标签</th> <th align="center">描述</th> </tr> </thead> <tbody> <tr> <td align="center">table</td> <td align="center">定义表格</td> </tr> <tr> <td align="center">th</td> <td align="center">定义表格的表头</td> </tr> <tr> <td align="center">tr</td> <td align="center">定义表格的行</td> </tr> <tr> <td align="center">td</td> <td align="center">定义表格单元</td> </tr> <tr> <td align="center">caption</td> <td align="center">定义表格标题</td> </tr> <tr> <td align="center">colgroup</td> <td align="center">定义表格列的组</td> </tr> <tr> <td align="center">col</td> <td align="center">定义用于表格列的属性</td> </tr> <tr> <td align="center">thead</td> <td align="center">定义表格的页眉</td> </tr> <tr> <td align="center">tbody</td> <td align="center">定义表格的主体</td> </tr> <tr> <td align="center">tfoot</td> <td align="center">定义表格的页脚</td> </tr> <tr> <td align="center">border</td> <td align="center">边框宽度</td> </tr> <tr> <td align="center">cellspacing</td> <td align="center">表格间距</td> </tr> <tr> <td align="center">cellpadding</td> <td align="center">表格填充</td> </tr> </tbody> </table> <p>示例：</p> <p><code>源代码:</code></p> <pre><code class="prism language-html"><span class="token tag"><span class="token tag"><span class="token punctuation"><</span>head</span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>style</span><span class="token punctuation">></span></span><span class="token style"><span class="token language-css"> <span class="token selector">thead</span> <span class="token punctuation">{</span><span class="token property">color</span><span class="token punctuation">:</span>green<span class="token punctuation">;</span><span class="token punctuation">}</span> <span class="token selector">tbody</span> <span class="token punctuation">{</span><span class="token property">color</span><span class="token punctuation">:</span>blue<span class="token punctuation">;</span><span class="token punctuation">}</span> <span class="token selector">tfoot</span> <span class="token punctuation">{</span><span class="token property">color</span><span class="token punctuation">:</span>red<span class="token punctuation">;</span><span class="token punctuation">}</span> </span></span><span class="token tag"><span class="token tag"><span class="token punctuation"></</span>style</span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"></</span>head</span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>table</span> <span class="token attr-name">border</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>1<span class="token punctuation">"</span></span> <span class="token attr-name">cellspacing</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>5px<span class="token punctuation">"</span></span> <span class="token attr-name">cellpadding</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>10px<span class="token punctuation">"</span></span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>caption</span><span class="token punctuation">></span></span>表格标题<span class="token tag"><span class="token tag"><span class="token punctuation"></</span>caption</span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>tr</span><span class="token punctuation">></span></span><span class="token tag"><span class="token tag"><span class="token punctuation"><</span>th</span> <span class="token attr-name">colspan</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>3<span class="token punctuation">"</span></span><span class="token punctuation">></span></span>该行表头演示列合并<span class="token tag"><span class="token tag"><span class="token punctuation"></</span>th</span><span class="token punctuation">></span></span><span class="token tag"><span class="token tag"><span class="token punctuation"></</span>tr</span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>thead</span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>tr</span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>th</span><span class="token punctuation">></span></span>表头1<span class="token tag"><span class="token tag"><span class="token punctuation"></</span>th</span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>th</span><span class="token punctuation">></span></span>表头2<span class="token tag"><span class="token tag"><span class="token punctuation"></</span>th</span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>th</span><span class="token punctuation">></span></span>表头3<span class="token tag"><span class="token tag"><span class="token punctuation"></</span>th</span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"></</span>tr</span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"></</span>thead</span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>tfoot</span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>tr</span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>td</span><span class="token punctuation">></span></span>页脚第1列<span class="token tag"><span class="token tag"><span class="token punctuation"></</span>td</span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>td</span><span class="token punctuation">></span></span>页脚第2列<span class="token tag"><span class="token tag"><span class="token punctuation"></</span>td</span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"></</span>tr</span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"></</span>tfoot</span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>tbody</span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>tr</span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>td</span><span class="token punctuation">></span></span>主体1行1列<span class="token tag"><span class="token tag"><span class="token punctuation"></</span>td</span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>td</span><span class="token punctuation">></span></span>主体1行2列<span class="token tag"><span class="token tag"><span class="token punctuation"></</span>td</span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>td</span> <span class="token attr-name">rowspan</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>3<span class="token punctuation">"</span></span><span class="token punctuation">></span></span>该区域显示行合并3行效果，不包括页脚<span class="token tag"><span class="token tag"><span class="token punctuation"></</span>td</span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"></</span>tr</span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>tr</span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>td</span><span class="token punctuation">></span></span>主体2行1列<span class="token tag"><span class="token tag"><span class="token punctuation"></</span>td</span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>td</span><span class="token punctuation">></span></span>主体2行2列<span class="token tag"><span class="token tag"><span class="token punctuation"></</span>td</span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"></</span>tr</span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"></</span>tbody</span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"></</span>table</span><span class="token punctuation">></span></span> </code></pre> <p><code>显示效果：</code></p> <blockquote> <table border="1"> <caption> 表格标题 </caption> <thead> <tr> <th colspan="3">该行表头演示列合并</th> </tr> <tr> <th>表头1</th> <th>表头2</th> <th>表头3</th> </tr> </thead> <tfoot> <tr> <td>页脚第1列</td> <td>页脚第2列</td> </tr> </tfoot> <tbody> <tr> <td>主体1行1列</td> <td>主体1行2列</td> <td rowspan="3">该区域显示行合并3行效果，不包括页脚。</td> </tr> <tr> <td>主体2行1列</td> <td>主体2行2列</td> </tr> </tbody> </table> </blockquote> <ul> <li>数据单元格可以包含文本、图片、列表、段落、表单、水平线、表格等等。</li> <li>如果不定义边框属性，表格将不显示边框。</li> </ul> <h3>15、列表</h3> <table> <thead> <tr> <th align="left">标签</th> <th align="left">描述</th> </tr> </thead> <tbody> <tr> <td align="left"><code><ol> </code></td> <td align="left">定义有序列表</td> </tr> <tr> <td align="left"><code><ul></code></td> <td align="left">定义无序列表</td> </tr> <tr> <td align="left"><code><li> </code></td> <td align="left">定义列表项</td> </tr> <tr> <td align="left"><code><dl> </code></td> <td align="left">定义列表</td> </tr> <tr> <td align="left"><code><dt> </code></td> <td align="left">自定义列表项目</td> </tr> <tr> <td align="left"><code><dd></code></td> <td align="left">定义自定列表项的描述</td> </tr> </tbody> </table> <ul> <li>自定义列表不仅仅是一列项目，而是项目及其注释的组合。</li> <li>自定义列表以<code> <dl></code> 标签开始。每个自定义列表项以 <code><dt> </code>开始。</li> <li>每个自定义列表项的定义以 <code><dd></code> 开始。</li> </ul> <p>示例：</p> <p><code>源代码：</code></p> <pre><code class="prism language-html"><span class="token tag"><span class="token tag"><span class="token punctuation"><</span>h4</span><span class="token punctuation">></span></span>编号列表：<span class="token tag"><span class="token tag"><span class="token punctuation"></</span>h4</span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>ol</span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>li</span><span class="token punctuation">></span></span>Apples<span class="token tag"><span class="token tag"><span class="token punctuation"></</span>li</span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>li</span><span class="token punctuation">></span></span>Bananas<span class="token tag"><span class="token tag"><span class="token punctuation"></</span>li</span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>li</span><span class="token punctuation">></span></span>Lemons<span class="token tag"><span class="token tag"><span class="token punctuation"></</span>li</span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>li</span><span class="token punctuation">></span></span>Oranges<span class="token tag"><span class="token tag"><span class="token punctuation"></</span>li</span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"></</span>ol</span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>h4</span><span class="token punctuation">></span></span>大写字母列表：<span class="token tag"><span class="token tag"><span class="token punctuation"></</span>h4</span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>ol</span> <span class="token attr-name">type</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>A<span class="token punctuation">"</span></span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>li</span><span class="token punctuation">></span></span>Apples<span class="token tag"><span class="token tag"><span class="token punctuation"></</span>li</span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>li</span><span class="token punctuation">></span></span>Bananas<span class="token tag"><span class="token tag"><span class="token punctuation"></</span>li</span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>li</span><span class="token punctuation">></span></span>Lemons<span class="token tag"><span class="token tag"><span class="token punctuation"></</span>li</span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>li</span><span class="token punctuation">></span></span>Oranges<span class="token tag"><span class="token tag"><span class="token punctuation"></</span>li</span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"></</span>ol</span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>h4</span><span class="token punctuation">></span></span>小写字母列表：<span class="token tag"><span class="token tag"><span class="token punctuation"></</span>h4</span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>ol</span> <span class="token attr-name">type</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>a<span class="token punctuation">"</span></span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>li</span><span class="token punctuation">></span></span>Apples<span class="token tag"><span class="token tag"><span class="token punctuation"></</span>li</span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>li</span><span class="token punctuation">></span></span>Bananas<span class="token tag"><span class="token tag"><span class="token punctuation"></</span>li</span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>li</span><span class="token punctuation">></span></span>Lemons<span class="token tag"><span class="token tag"><span class="token punctuation"></</span>li</span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>li</span><span class="token punctuation">></span></span>Oranges<span class="token tag"><span class="token tag"><span class="token punctuation"></</span>li</span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"></</span>ol</span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>h4</span><span class="token punctuation">></span></span>圆点列表：<span class="token tag"><span class="token tag"><span class="token punctuation"></</span>h4</span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>ul</span> <span class="token special-attr"><span class="token attr-name">style</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span><span class="token value css language-css"><span class="token property">list-style-type</span><span class="token punctuation">:</span>disc</span><span class="token punctuation">"</span></span></span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>li</span><span class="token punctuation">></span></span>Apples<span class="token tag"><span class="token tag"><span class="token punctuation"></</span>li</span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>li</span><span class="token punctuation">></span></span>Bananas<span class="token tag"><span class="token tag"><span class="token punctuation"></</span>li</span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>li</span><span class="token punctuation">></span></span>Lemons<span class="token tag"><span class="token tag"><span class="token punctuation"></</span>li</span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>li</span><span class="token punctuation">></span></span>Oranges<span class="token tag"><span class="token tag"><span class="token punctuation"></</span>li</span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"></</span>ul</span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>h4</span><span class="token punctuation">></span></span>圆圈列表：<span class="token tag"><span class="token tag"><span class="token punctuation"></</span>h4</span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>ul</span> <span class="token special-attr"><span class="token attr-name">style</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span><span class="token value css language-css"><span class="token property">list-style-type</span><span class="token punctuation">:</span>circle</span><span class="token punctuation">"</span></span></span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>li</span><span class="token punctuation">></span></span>Apples<span class="token tag"><span class="token tag"><span class="token punctuation"></</span>li</span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>li</span><span class="token punctuation">></span></span>Bananas<span class="token tag"><span class="token tag"><span class="token punctuation"></</span>li</span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>li</span><span class="token punctuation">></span></span>Lemons<span class="token tag"><span class="token tag"><span class="token punctuation"></</span>li</span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>li</span><span class="token punctuation">></span></span>Oranges<span class="token tag"><span class="token tag"><span class="token punctuation"></</span>li</span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"></</span>ul</span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>h4</span><span class="token punctuation">></span></span>正方形列表：<span class="token tag"><span class="token tag"><span class="token punctuation"></</span>h4</span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>ul</span> <span class="token special-attr"><span class="token attr-name">style</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span><span class="token value css language-css"><span class="token property">list-style-type</span><span class="token punctuation">:</span>square</span><span class="token punctuation">"</span></span></span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>li</span><span class="token punctuation">></span></span>Apples<span class="token tag"><span class="token tag"><span class="token punctuation"></</span>li</span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>li</span><span class="token punctuation">></span></span>Bananas<span class="token tag"><span class="token tag"><span class="token punctuation"></</span>li</span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>li</span><span class="token punctuation">></span></span>Lemons<span class="token tag"><span class="token tag"><span class="token punctuation"></</span>li</span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>li</span><span class="token punctuation">></span></span>Oranges<span class="token tag"><span class="token tag"><span class="token punctuation"></</span>li</span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"></</span>ul</span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>h4</span><span class="token punctuation">></span></span>嵌套列表：<span class="token tag"><span class="token tag"><span class="token punctuation"></</span>h4</span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>ul</span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>li</span><span class="token punctuation">></span></span>Coffee<span class="token tag"><span class="token tag"><span class="token punctuation"></</span>li</span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>li</span><span class="token punctuation">></span></span>Tea <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>ul</span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>li</span><span class="token punctuation">></span></span>Black tea<span class="token tag"><span class="token tag"><span class="token punctuation"></</span>li</span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>li</span><span class="token punctuation">></span></span>Green tea <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>ul</span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>li</span><span class="token punctuation">></span></span>China<span class="token tag"><span class="token tag"><span class="token punctuation"></</span>li</span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>li</span><span class="token punctuation">></span></span>Africa<span class="token tag"><span class="token tag"><span class="token punctuation"></</span>li</span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"></</span>ul</span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"></</span>li</span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"></</span>ul</span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"></</span>li</span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>li</span><span class="token punctuation">></span></span>Milk<span class="token tag"><span class="token tag"><span class="token punctuation"></</span>li</span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"></</span>ul</span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>h4</span><span class="token punctuation">></span></span>一个自定义列表：<span class="token tag"><span class="token tag"><span class="token punctuation"></</span>h4</span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>dl</span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>dt</span><span class="token punctuation">></span></span>Coffee<span class="token tag"><span class="token tag"><span class="token punctuation"></</span>dt</span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>dd</span><span class="token punctuation">></span></span>- black hot drink<span class="token tag"><span class="token tag"><span class="token punctuation"></</span>dd</span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>dt</span><span class="token punctuation">></span></span>Milk<span class="token tag"><span class="token tag"><span class="token punctuation"></</span>dt</span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>dd</span><span class="token punctuation">></span></span>- white cold drink<span class="token tag"><span class="token tag"><span class="token punctuation"></</span>dd</span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"></</span>dl</span><span class="token punctuation">></span></span> </code></pre> <p><code>显示效果：</code></p> <blockquote> <h5>编号列表：</h5> <ol> <li>Apples</li> <li>Bananas</li> <li>Lemons</li> <li>Oranges</li> </ol> <h5>大写字母列表：</h5> <ol type="A"> <li>Apples</li> <li>Bananas</li> <li>Lemons</li> <li>Oranges</li> </ol> <h5>小写字母列表：</h5> <ol type="a"> <li>Apples</li> <li>Bananas</li> <li>Lemons</li> <li>Oranges</li> </ol> <h5>圆点列表：</h5> <ul> <li>Apples</li> <li>Bananas</li> <li>Lemons</li> <li>Oranges</li> </ul> <h5>圆圈列表：</h5> <ul> <li>Apples</li> <li>Bananas</li> <li>Lemons</li> <li>Oranges</li> </ul> <h5>正方形列表：</h5> <ul> <li>Apples</li> <li>Bananas</li> <li>Lemons</li> <li>Oranges</li> </ul> <h5>嵌套列表：</h5> <ul> <li>Coffee</li> <li>Tea <ul> <li>Black tea</li> <li>Green tea <ul> <li>China</li> <li>Africa</li> </ul> </li> </ul> </li> <li>Milk</li> </ul> <h5>一个自定义列表：</h5> <dl> Coffee <dd> - black hot drink </dd> Milk <dd> - white cold drink </dd> </dl> </blockquote> <h3>16、区块</h3> <h4>标签div</h4> <p><code><div></code><strong>元素没有特定的含义</strong>。</p> <ul> <li>它属于块级元素，浏览器会在其前后显示折行。</li> <li>它可用于组合其他 HTML 元素的容器。</li> <li>如果与 CSS 一同使用，<code><div></code>元素可用于对大的内容块设置样式属性。</li> <li><code><div></code>元素的另一个常见的用途是文档布局。它取代了使用表格定义布局的老式方法。使用<code><table></code>元素进行文档布局不是表格的正确用法。<code><table></code>元素的作用是显示表格化的数据。</li> </ul> <p>举例：</p> <p><code>源代码：</code></p> <pre><code class="prism language-html"><span class="token tag"><span class="token tag"><span class="token punctuation"><</span>p</span><span class="token punctuation">></span></span>这是一些文本。<span class="token tag"><span class="token tag"><span class="token punctuation"></</span>p</span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>div</span> <span class="token special-attr"><span class="token attr-name">style</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span><span class="token value css language-css"><span class="token property">color</span><span class="token punctuation">:</span>#0000FF</span><span class="token punctuation">"</span></span></span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>h3</span><span class="token punctuation">></span></span>这是一个在 div 元素中的标题。<span class="token tag"><span class="token tag"><span class="token punctuation"></</span>h3</span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>p</span><span class="token punctuation">></span></span>这是一个在 div 元素中的文本。<span class="token tag"><span class="token tag"><span class="token punctuation"></</span>p</span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"></</span>div</span><span class="token punctuation">></span></span> </code></pre> <p><code>显示效果：</code></p> <blockquote> <p>这是一些文本。</p> <div> <h4>这是一个在 div 元素中的标题。</h4> <p>这是一个在 div 元素中的文本。</p> </div> </blockquote> <h4>标签span</h4> <p><code><span></code><strong>元素也没有特定的含义</strong>。</p> <ul> <li> <p><code><span></code>元素是内联元素，可用作文本的容器。</p> </li> <li> <p>当与 CSS 一同使用时， 元素可用于为部分文本设置样式属性。</p> </li> </ul> <p>示例：</p> <p><code>源代码：</code></p> <pre><code class="prism language-html"><span class="token tag"><span class="token tag"><span class="token punctuation"><</span>p</span><span class="token punctuation">></span></span>我的母亲有 <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>span</span> <span class="token special-attr"><span class="token attr-name">style</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span><span class="token value css language-css"><span class="token property">color</span><span class="token punctuation">:</span>blue<span class="token punctuation">;</span><span class="token property">font-weight</span><span class="token punctuation">:</span>bold</span><span class="token punctuation">"</span></span></span><span class="token punctuation">></span></span>蓝色<span class="token tag"><span class="token tag"><span class="token punctuation"></</span>span</span><span class="token punctuation">></span></span> 的眼睛，我的父亲有 <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>span</span> <span class="token special-attr"><span class="token attr-name">style</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span><span class="token value css language-css"><span class="token property">color</span><span class="token punctuation">:</span>darkolivegreen<span class="token punctuation">;</span><span class="token property">font-weight</span><span class="token punctuation">:</span>bold</span><span class="token punctuation">"</span></span></span><span class="token punctuation">></span></span>碧绿色<span class="token tag"><span class="token tag"><span class="token punctuation"></</span>span</span><span class="token punctuation">></span></span> 的眼睛。<span class="token tag"><span class="token tag"><span class="token punctuation"></</span>p</span><span class="token punctuation">></span></span> </code></pre> <p><code>显示效果：</code></p> <blockquote> <p>我的母亲有 蓝色 的眼睛，我的父亲有 碧绿色 的眼睛。</p> </blockquote> <h3>17、布局</h3> <p>大多数网站可以使用<code><div></code>或者<code><table></code>元素来创建多列。CSS 用于对元素进行定位，或者为页面创建背景以及色彩丰富的外观。</p> <ul> <li>使用div:</li> </ul> <p><code>源代码：</code></p> <pre><code class="prism language-html"><span class="token tag"><span class="token tag"><span class="token punctuation"><</span>div</span> <span class="token attr-name">id</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>container<span class="token punctuation">"</span></span> <span class="token special-attr"><span class="token attr-name">style</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span><span class="token value css language-css"><span class="token property">width</span><span class="token punctuation">:</span>500px</span><span class="token punctuation">"</span></span></span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>div</span> <span class="token attr-name">id</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>header<span class="token punctuation">"</span></span> <span class="token special-attr"><span class="token attr-name">style</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span><span class="token value css language-css"><span class="token property">background-color</span><span class="token punctuation">:</span>#FFA500<span class="token punctuation">;</span></span><span class="token punctuation">"</span></span></span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>h1</span> <span class="token special-attr"><span class="token attr-name">style</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span><span class="token value css language-css"><span class="token property">margin-bottom</span><span class="token punctuation">:</span>0<span class="token punctuation">;</span></span><span class="token punctuation">"</span></span></span><span class="token punctuation">></span></span>主要的网页标题<span class="token tag"><span class="token tag"><span class="token punctuation"></</span>h1</span><span class="token punctuation">></span></span><span class="token tag"><span class="token tag"><span class="token punctuation"></</span>div</span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>div</span> <span class="token attr-name">id</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>menu<span class="token punctuation">"</span></span> <span class="token special-attr"><span class="token attr-name">style</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span><span class="token value css language-css"><span class="token property">background-color</span><span class="token punctuation">:</span>#FFD700<span class="token punctuation">;</span><span class="token property">height</span><span class="token punctuation">:</span>200px<span class="token punctuation">;</span><span class="token property">width</span><span class="token punctuation">:</span>100px<span class="token punctuation">;</span><span class="token property">float</span><span class="token punctuation">:</span>left<span class="token punctuation">;</span></span><span class="token punctuation">"</span></span></span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>b</span><span class="token punctuation">></span></span>菜单<span class="token tag"><span class="token tag"><span class="token punctuation"></</span>b</span><span class="token punctuation">></span></span><span class="token tag"><span class="token tag"><span class="token punctuation"><</span>br</span><span class="token punctuation">></span></span> HTML<span class="token tag"><span class="token tag"><span class="token punctuation"><</span>br</span><span class="token punctuation">></span></span> CSS<span class="token tag"><span class="token tag"><span class="token punctuation"><</span>br</span><span class="token punctuation">></span></span> JavaScript<span class="token tag"><span class="token tag"><span class="token punctuation"></</span>div</span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>div</span> <span class="token attr-name">id</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>content<span class="token punctuation">"</span></span> <span class="token special-attr"><span class="token attr-name">style</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span><span class="token value css language-css"><span class="token property">background-color</span><span class="token punctuation">:</span>#EEEEEE<span class="token punctuation">;</span><span class="token property">height</span><span class="token punctuation">:</span>200px<span class="token punctuation">;</span><span class="token property">width</span><span class="token punctuation">:</span>400px<span class="token punctuation">;</span><span class="token property">float</span><span class="token punctuation">:</span>left<span class="token punctuation">;</span></span><span class="token punctuation">"</span></span></span><span class="token punctuation">></span></span> 内容在这里<span class="token tag"><span class="token tag"><span class="token punctuation"></</span>div</span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>div</span> <span class="token attr-name">id</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>footer<span class="token punctuation">"</span></span> <span class="token special-attr"><span class="token attr-name">style</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span><span class="token value css language-css"><span class="token property">background-color</span><span class="token punctuation">:</span>#FFA500<span class="token punctuation">;</span><span class="token property">clear</span><span class="token punctuation">:</span>both<span class="token punctuation">;</span><span class="token property">text-align</span><span class="token punctuation">:</span>center<span class="token punctuation">;</span></span><span class="token punctuation">"</span></span></span><span class="token punctuation">></span></span> 版权 © https://blog.csdn.net/m0_53297256<span class="token tag"><span class="token tag"><span class="token punctuation"></</span>div</span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"></</span>div</span><span class="token punctuation">></span></span> </code></pre> <p><code>显示效果：</code></p> <blockquote> <div id="container"> <div id="header"> <h2>主要的网页标题</h2> </div> <div id="menu"> <b>菜单</b> <br> HTML <br> CSS <br> JavaScript </div> <div id="content"> 内容在这里 </div> <div id="footer"> 版权 © https://blog.csdn.net/m0_53297256 </div> </div> </blockquote> <ul> <li>使用table:</li> </ul> <p><code>源代码：</code></p> <pre><code class="prism language-html"><span class="token tag"><span class="token tag"><span class="token punctuation"><</span>table</span> <span class="token attr-name">width</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>500<span class="token punctuation">"</span></span> <span class="token attr-name">border</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>0<span class="token punctuation">"</span></span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>tr</span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>td</span> <span class="token attr-name">colspan</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>1<span class="token punctuation">"</span></span> <span class="token special-attr"><span class="token attr-name">style</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span><span class="token value css language-css"><span class="token property">background-color</span><span class="token punctuation">:</span>red</span><span class="token punctuation">"</span></span></span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>h1</span><span class="token punctuation">></span></span>主要的网页标题<span class="token tag"><span class="token tag"><span class="token punctuation"></</span>h1</span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"></</span>td</span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"></</span>tr</span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>tr</span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>td</span> <span class="token special-attr"><span class="token attr-name">style</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span><span class="token value css language-css"><span class="token property">background-color</span><span class="token punctuation">:</span>#FFD700<span class="token punctuation">;</span><span class="token property">width</span><span class="token punctuation">:</span>100px<span class="token punctuation">;</span><span class="token property">vertical-align</span><span class="token punctuation">:</span>top<span class="token punctuation">;</span></span><span class="token punctuation">"</span></span></span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>b</span><span class="token punctuation">></span></span>菜单<span class="token tag"><span class="token tag"><span class="token punctuation"></</span>b</span><span class="token punctuation">></span></span><span class="token tag"><span class="token tag"><span class="token punctuation"><</span>br</span><span class="token punctuation">></span></span> HTML<span class="token tag"><span class="token tag"><span class="token punctuation"><</span>br</span><span class="token punctuation">></span></span> CSS<span class="token tag"><span class="token tag"><span class="token punctuation"><</span>br</span><span class="token punctuation">></span></span> JavaScript <span class="token tag"><span class="token tag"><span class="token punctuation"></</span>td</span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>td</span> <span class="token special-attr"><span class="token attr-name">style</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span><span class="token value css language-css"><span class="token property">background-color</span><span class="token punctuation">:</span>#eeeeee<span class="token punctuation">;</span><span class="token property">height</span><span class="token punctuation">:</span>200px<span class="token punctuation">;</span><span class="token property">width</span><span class="token punctuation">:</span>400px<span class="token punctuation">;</span><span class="token property">vertical-align</span><span class="token punctuation">:</span>center<span class="token punctuation">;</span></span><span class="token punctuation">"</span></span></span><span class="token punctuation">></span></span> 内容在这里<span class="token tag"><span class="token tag"><span class="token punctuation"></</span>td</span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"></</span>tr</span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>tr</span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>td</span> <span class="token attr-name">colspan</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>2<span class="token punctuation">"</span></span> <span class="token special-attr"><span class="token attr-name">style</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span><span class="token value css language-css"><span class="token property">background-color</span><span class="token punctuation">:</span>#FFA500<span class="token punctuation">;</span><span class="token property">text-align</span><span class="token punctuation">:</span>center<span class="token punctuation">;</span></span><span class="token punctuation">"</span></span></span><span class="token punctuation">></span></span> 版权 © https://blog.csdn.net/m0_53297256<span class="token tag"><span class="token tag"><span class="token punctuation"></</span>td</span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"></</span>tr</span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"></</span>table</span><span class="token punctuation">></span></span> </code></pre> <p><code>显示效果：</code></p> <blockquote> <table width="500" border="0"> <tbody> <tr> <td colspan="1"> <h2>主要的网页标题</h2> </td> </tr> <tr> <td> <b>菜单</b><br> HTML<br> CSS<br> JavaScript </td> <td> 内容在这里</td> </tr> <tr> <td colspan="2"> 版权 © https://blog.csdn.net/m0_53297256</td> </tr> </tbody> </table> </blockquote> <h3>18、表单</h3> <p><strong>表单用于收集用户的输入信息</strong>。表单表示文档中的一个区域，此区域包含交互控件，将用户收集到的信息发送到 Web 服务器。表单元素是允许用户在表单中输入内容，比如：文本域（textarea）、下拉列表（select）、单选框（radio-buttons）、复选框（checkbox） 等等。</p> <table> <thead> <tr> <th align="left">标签</th> <th align="left">描述</th> </tr> </thead> <tbody> <tr> <td align="left">form</td> <td align="left">定义供用户输入的表单</td> </tr> <tr> <td align="left">input</td> <td align="left">定义输入域</td> </tr> <tr> <td align="left">textarea</td> <td align="left">定义文本域 (一个多行的输入控件)</td> </tr> <tr> <td align="left">label</td> <td align="left">定义了input元素的标签，一般为输入标题</td> </tr> <tr> <td align="left">fieldset</td> <td align="left">定义了一组相关的表单元素，并使用外框包含起来</td> </tr> <tr> <td align="left">legend</td> <td align="left">定义了fieldset元素的标题</td> </tr> <tr> <td align="left">select</td> <td align="left">定义了下拉选项列表</td> </tr> <tr> <td align="left">optgroup</td> <td align="left">定义选项组</td> </tr> <tr> <td align="left">option</td> <td align="left">定义下拉列表中的选项</td> </tr> <tr> <td align="left">button</td> <td align="left">定义一个点击按钮</td> </tr> <tr> <td align="left">datalist</td> <td align="left">指定一个预先定义的输入控件选项列表</td> </tr> <tr> <td align="left">keygen</td> <td align="left">用于表单的密钥对生成器字段。当提交表单时，私钥存储在本地，公钥发送到服务器。<br>效果是保存输入框中输入过的信息，再次点击该输入框会显示上一次输入过的信息。</td> </tr> <tr> <td align="left">output</td> <td align="left">定义一个计算结果</td> </tr> </tbody> </table> <p><a href="http://img.e-com-net.com/image/info8/c9947ee640f94c4bbdae4d7f08f36e24.jpg" target="_blank"><img src="http://img.e-com-net.com/image/info8/c9947ee640f94c4bbdae4d7f08f36e24.jpg" alt="03 html基础详解_第5张图片" width="586" height="577" style="border:1px solid black;"></a><br> <a href="http://img.e-com-net.com/image/info8/d7b256c8f3054ec29acec9b7476865d9.jpg" target="_blank"><img src="http://img.e-com-net.com/image/info8/d7b256c8f3054ec29acec9b7476865d9.jpg" alt="03 html基础详解_第6张图片" width="650" height="422" style="border:1px solid black;"></a><br> <a href="http://img.e-com-net.com/image/info8/e2fbf8f466b74cef930573718da6bdb3.jpg" target="_blank"><img src="http://img.e-com-net.com/image/info8/e2fbf8f466b74cef930573718da6bdb3.jpg" alt="03 html基础详解_第7张图片" width="477" height="426" style="border:1px solid black;"></a><br> <a href="http://img.e-com-net.com/image/info8/e9a5be9d2b7f43f19cb4f78174a01ddb.jpg" target="_blank"><img src="http://img.e-com-net.com/image/info8/e9a5be9d2b7f43f19cb4f78174a01ddb.jpg" alt="03 html基础详解_第8张图片" width="442" height="268" style="border:1px solid black;"></a></p> <p>示例：</p> <table> <thead> <tr> <th align="center">属性</th> <th>描述</th> </tr> </thead> <tbody> <tr> <td align="center">action</td> <td>规定当提交表单时，向何处发送表单数据。值为URL</td> </tr> <tr> <td align="center">method</td> <td>规定用于发送 form-data 的 HTTP 方法。</td> </tr> <tr> <td align="center">for</td> <td>规定 label 与哪个表单元素绑定。</td> </tr> <tr> <td align="center">reset</td> <td>重置</td> </tr> <tr> <td align="center">placeholder</td> <td>输入框灰色字体输入提示</td> </tr> <tr> <td align="center">radio</td> <td>单选类型（name值相同为一组）</td> </tr> <tr> <td align="center">checkbook</td> <td>多选框</td> </tr> </tbody> </table> <p>示例：</p> <p><code>源代码：</code></p> <pre><code class="prism language-html"><span class="token tag"><span class="token tag"><span class="token punctuation"><</span>form</span> <span class="token attr-name">action</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>http://112.74.72.107:3333/try<span class="token punctuation">"</span></span> <span class="token attr-name">method</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>post<span class="token punctuation">"</span></span> <span class="token attr-name">target</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>_blank<span class="token punctuation">"</span></span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>label</span> <span class="token attr-name">for</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>name<span class="token punctuation">"</span></span><span class="token punctuation">></span></span><span class="token tag"><span class="token tag"><span class="token punctuation"></</span>label</span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>fieldset</span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>legend</span><span class="token punctuation">></span></span>账户:<span class="token tag"><span class="token tag"><span class="token punctuation"></</span>legend</span><span class="token punctuation">></span></span> Username: <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>input</span> <span class="token attr-name">type</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>text<span class="token punctuation">"</span></span> <span class="token attr-name">name</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>Username<span class="token punctuation">"</span></span> <span class="token attr-name">value</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span><span class="token punctuation">"</span></span> <span class="token attr-name">placeholder</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>Username<span class="token punctuation">"</span></span> <span class="token attr-name">id</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>name<span class="token punctuation">"</span></span><span class="token punctuation">></span></span><span class="token tag"><span class="token tag"><span class="token punctuation"><</span>br</span><span class="token punctuation">></span></span> password: <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>input</span> <span class="token attr-name">type</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>text<span class="token punctuation">"</span></span> <span class="token attr-name">name</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>password<span class="token punctuation">"</span></span> <span class="token attr-name">value</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span><span class="token punctuation">"</span></span> <span class="token attr-name">placeholder</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>password<span class="token punctuation">"</span></span> <span class="token attr-name">id</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>name<span class="token punctuation">"</span></span><span class="token punctuation">></span></span><span class="token tag"><span class="token tag"><span class="token punctuation"><</span>br</span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"></</span>fieldset</span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>button</span> <span class="token attr-name">type</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>button<span class="token punctuation">"</span></span> <span class="token special-attr"><span class="token attr-name">onclick</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span><span class="token value javascript language-javascript"><span class="token function">alert</span><span class="token punctuation">(</span><span class="token string">'你好，世界!'</span><span class="token punctuation">)</span></span><span class="token punctuation">"</span></span></span><span class="token punctuation">></span></span>点我弹出信息提示!<span class="token tag"><span class="token tag"><span class="token punctuation"></</span>button</span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>br</span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>textarea</span> <span class="token attr-name">rows</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>10<span class="token punctuation">"</span></span> <span class="token attr-name">cols</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>30<span class="token punctuation">"</span></span> <span class="token attr-name">placeholder</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>在这里输入...<span class="token punctuation">"</span></span> <span class="token attr-name">id</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>name<span class="token punctuation">"</span></span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"></</span>textarea</span><span class="token punctuation">></span></span><span class="token tag"><span class="token tag"><span class="token punctuation"><</span>br</span><span class="token punctuation">></span></span> 班级<span class="token tag"><span class="token tag"><span class="token punctuation"><</span>select</span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>option</span> <span class="token attr-name">value</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>c301<span class="token punctuation">"</span></span><span class="token punctuation">></span></span>三年级1班<span class="token tag"><span class="token tag"><span class="token punctuation"></</span>option</span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>option</span> <span class="token attr-name">value</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>c302<span class="token punctuation">"</span></span><span class="token punctuation">></span></span>三年级2班<span class="token tag"><span class="token tag"><span class="token punctuation"></</span>option</span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>option</span> <span class="token attr-name">value</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>c303<span class="token punctuation">"</span></span><span class="token punctuation">></span></span>三年级3班<span class="token tag"><span class="token tag"><span class="token punctuation"></</span>option</span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>option</span> <span class="token attr-name">value</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>c304<span class="token punctuation">"</span></span><span class="token punctuation">></span></span>三年级4班<span class="token tag"><span class="token tag"><span class="token punctuation"></</span>option</span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"></</span>select</span><span class="token punctuation">></span></span><span class="token tag"><span class="token tag"><span class="token punctuation"><</span>br</span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>label</span> <span class="token attr-name">for</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>male<span class="token punctuation">"</span></span><span class="token punctuation">></span></span>Male<span class="token tag"><span class="token tag"><span class="token punctuation"></</span>label</span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>input</span> <span class="token attr-name">type</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>radio<span class="token punctuation">"</span></span> <span class="token attr-name">name</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>sex<span class="token punctuation">"</span></span> <span class="token attr-name">id</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>male<span class="token punctuation">"</span></span> <span class="token attr-name">value</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>male<span class="token punctuation">"</span></span><span class="token punctuation">></span></span><span class="token tag"><span class="token tag"><span class="token punctuation"><</span>br</span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>label</span> <span class="token attr-name">for</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>female<span class="token punctuation">"</span></span><span class="token punctuation">></span></span>Female<span class="token tag"><span class="token tag"><span class="token punctuation"></</span>label</span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>input</span> <span class="token attr-name">type</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>radio<span class="token punctuation">"</span></span> <span class="token attr-name">name</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>sex<span class="token punctuation">"</span></span> <span class="token attr-name">id</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>female<span class="token punctuation">"</span></span> <span class="token attr-name">value</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>female<span class="token punctuation">"</span></span><span class="token punctuation">></span></span><span class="token tag"><span class="token tag"><span class="token punctuation"><</span>br</span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>button</span> <span class="token attr-name">type</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>submit<span class="token punctuation">"</span></span><span class="token punctuation">></span></span>提交<span class="token tag"><span class="token tag"><span class="token punctuation"></</span>button</span><span class="token punctuation">></span></span><span class="token tag"><span class="token tag"><span class="token punctuation"><</span>button</span> <span class="token attr-name">type</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>reset<span class="token punctuation">"</span></span><span class="token punctuation">></span></span>重置<span class="token tag"><span class="token tag"><span class="token punctuation"></</span>button</span><span class="token punctuation">></span></span><span class="token tag"><span class="token tag"><span class="token punctuation"><</span>br</span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>input</span> <span class="token attr-name">list</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>browsers<span class="token punctuation">"</span></span> <span class="token attr-name">name</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>browser<span class="token punctuation">"</span></span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>datalist</span> <span class="token attr-name">id</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>browsers<span class="token punctuation">"</span></span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>option</span> <span class="token attr-name">value</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>第一个输入选项<span class="token punctuation">"</span></span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>option</span> <span class="token attr-name">value</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>第二个输入选项<span class="token punctuation">"</span></span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>option</span> <span class="token attr-name">value</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>第三个输入选项<span class="token punctuation">"</span></span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>option</span> <span class="token attr-name">value</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>第四个输入选项<span class="token punctuation">"</span></span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>option</span> <span class="token attr-name">value</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>第五个输入选项<span class="token punctuation">"</span></span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"></</span>datalist</span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>input</span> <span class="token attr-name">type</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>submit<span class="token punctuation">"</span></span> <span class="token attr-name">value</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>input标签type值为'submit'，value默认值'提交'<span class="token punctuation">"</span></span><span class="token punctuation">></span></span><span class="token tag"><span class="token tag"><span class="token punctuation"><</span>br</span><span class="token punctuation">></span></span> 用户名: <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>input</span> <span class="token attr-name">type</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>text<span class="token punctuation">"</span></span> <span class="token attr-name">name</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>usr_name<span class="token punctuation">"</span></span> <span class="token attr-name">id</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>name<span class="token punctuation">"</span></span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>keygen</span> <span class="token attr-name">name</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>security<span class="token punctuation">"</span></span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>button</span> <span class="token attr-name">type</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>submit<span class="token punctuation">"</span></span><span class="token punctuation">></span></span>提交<span class="token tag"><span class="token tag"><span class="token punctuation"></</span>button</span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>p</span><span class="token punctuation">></span></span>点击"提交"按钮，表单数据将被发送到http://112.74.72.107:3333/try”。<span class="token tag"><span class="token tag"><span class="token punctuation"></</span>p</span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"></</span>form</span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>form</span> <span class="token attr-name">oninput</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>x.value=parseInt(a.value)+parseInt(b.value)<span class="token punctuation">"</span></span><span class="token punctuation">></span></span>0 <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>input</span> <span class="token attr-name">type</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>range<span class="token punctuation">"</span></span> <span class="token attr-name">id</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>a<span class="token punctuation">"</span></span> <span class="token attr-name">value</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>50<span class="token punctuation">"</span></span><span class="token punctuation">></span></span>100 +<span class="token tag"><span class="token tag"><span class="token punctuation"><</span>input</span> <span class="token attr-name">type</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>number<span class="token punctuation">"</span></span> <span class="token attr-name">id</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>b<span class="token punctuation">"</span></span> <span class="token attr-name">value</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>50<span class="token punctuation">"</span></span><span class="token punctuation">></span></span> =<span class="token tag"><span class="token tag"><span class="token punctuation"><</span>output</span> <span class="token attr-name">name</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>x<span class="token punctuation">"</span></span> <span class="token attr-name">for</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>a b<span class="token punctuation">"</span></span><span class="token punctuation">></span></span><span class="token tag"><span class="token tag"><span class="token punctuation"></</span>output</span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"></</span>form</span><span class="token punctuation">></span></span> </code></pre> <p><code>显示结果：</code></p> <p>（功能标签把上述源码放在html中测试，这里仅展示效果。）</p> <blockquote> 账户: Username: <br> password: <br> 点我弹出信息提示! <br> <br> 班级 三年级1班 三年级2班 三年级3班 三年级4班 <br> Male <br> Female <br> 提交重置 <br> <br> 用户名: 提交 <p>点击"提交"按钮，表单数据将被发送到http://112.74.72.107:3333/try”。</p> 0 100 + = </blockquote> <h3>19、框架</h3> <p><strong>通过使用框架，你可以在同一个浏览器窗口中显示不止一个页面</strong>。</p> <h4>标签iframe</h4> <h5>属性height</h5> <h5>属性width</h5> <h5>属性src</h5> <h5>属性frameborder</h5> <p>设置属性值为 “0” 移除iframe的边框。</p> <p>示例：</p> <p><code>源代码：</code></p> <pre><code class="prism language-html"><span class="token tag"><span class="token tag"><span class="token punctuation"><</span>iframe</span> <span class="token attr-name">src</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>https://blog.csdn.net/m0_53297256<span class="token punctuation">"</span></span> <span class="token attr-name">width</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>200<span class="token punctuation">"</span></span> <span class="token attr-name">height</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>200<span class="token punctuation">"</span></span> <span class="token attr-name">name</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>iframe<span class="token punctuation">"</span></span> <span class="token attr-name">frameborder</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>5<span class="token punctuation">"</span></span><span class="token punctuation">></span></span><span class="token tag"><span class="token tag"><span class="token punctuation"></</span>iframe</span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>p</span><span class="token punctuation">></span></span><span class="token tag"><span class="token tag"><span class="token punctuation"><</span>a</span> <span class="token attr-name">href</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>https://blog.csdn.net/m0_53297256?type=download<span class="token punctuation">"</span></span> <span class="token attr-name">target</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>iframe<span class="token punctuation">"</span></span><span class="token punctuation">></span></span>点击这里查看我的资源<span class="token tag"><span class="token tag"><span class="token punctuation"></</span>a</span><span class="token punctuation">></span></span><span class="token tag"><span class="token tag"><span class="token punctuation"></</span>p</span><span class="token punctuation">></span></span> </code></pre> <p><code>显示效果：</code></p> <blockquote> <p>点击这里查看我的资源</p> </blockquote> <h3>20、颜色</h3> <p>HTML颜色由一个十六进制符号来定义，这个符号由红色、绿色和蓝色的值组成（RGB）。</p> <ul> <li> <p>每种颜色的最小值是0（十六进制：#00）。最大值是255（十六进制：#FF）。</p> </li> <li> <p>17标准颜色：黑色，蓝色，水，紫红色，灰色，绿色，石灰，栗色，海军，橄榄，橙，紫，红，白，银，蓝绿色，黄色。</p> </li> <li> <p>十六进制值的写法为 # 号后跟三个或六个十六进制字符。</p> <p>三位数表示法为：#RGB，转换为6位数表示为：#RRGGBB。</p> </li> </ul> <h4>属性rgba</h4> <p>RGBA 的意思是（Red-Green-Blue-Alpha）它是在 RGB 上扩展包括了 <strong>“alpha”</strong> 通道，运行对颜色值设置透明度。相对于使用 rgb(255,255,0)，使用 rgba(255,255,0,0.5) 可以实现设置颜色透明度的功能，这里的 0.5 表示透明度，范围 0~1，0 表示全透明。</p> <h3>21、脚本</h3> <p>JavaScript 使 HTML 页面具有更强的动态和交互性。</p> <h4>标签script</h4> <p><strong>用于定义客户端脚本</strong>，比如 JavaScript。script元素既可包含脚本语句，也可通过 src 属性指向外部脚本文件。</p> <ul> <li>JavaScript 最常用于图片操作、表单验证以及内容动态更新。</li> </ul> <h4>标签noscript</h4> <p><strong>提供无法使用脚本时的替代内容</strong>，比方在浏览器禁用脚本时，或浏览器不支持客户端脚本时。noscript元素可包含普通HTML页面的body元素中能够找到的所有元素。</p> <ul> <li>只有在浏览器不支持脚本或者禁用脚本时，才会显示 元素中的内容。</li> </ul> <p>示例：</p> <p><code>源代码：</code></p> <pre><code class="prism language-html"><span class="token tag"><span class="token tag"><span class="token punctuation"><</span>p</span> <span class="token attr-name">id</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>demo<span class="token punctuation">"</span></span><span class="token punctuation">></span></span> JavaScript 可以触发事件，就像按钮点击。<span class="token tag"><span class="token tag"><span class="token punctuation"></</span>p</span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>script</span><span class="token punctuation">></span></span><span class="token script"><span class="token language-javascript"> <span class="token keyword">function</span> <span class="token function">myFunction</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token punctuation">{</span> document<span class="token punctuation">.</span><span class="token function">getElementById</span><span class="token punctuation">(</span><span class="token string">"demo"</span><span class="token punctuation">)</span><span class="token punctuation">.</span>innerHTML<span class="token operator">=</span><span class="token string">"Hello JavaScript!"</span><span class="token punctuation">;</span> <span class="token punctuation">}</span> </span></span><span class="token tag"><span class="token tag"><span class="token punctuation"></</span>script</span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>button</span> <span class="token attr-name">type</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>button<span class="token punctuation">"</span></span> <span class="token special-attr"><span class="token attr-name">onclick</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span><span class="token value javascript language-javascript"><span class="token function">myFunction</span><span class="token punctuation">(</span><span class="token punctuation">)</span></span><span class="token punctuation">"</span></span></span><span class="token punctuation">></span></span>点我<span class="token tag"><span class="token tag"><span class="token punctuation"></</span>button</span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>noscript</span><span class="token punctuation">></span></span>抱歉，你的浏览器不支持 JavaScript!<span class="token tag"><span class="token tag"><span class="token punctuation"></</span>noscript</span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>p</span><span class="token punctuation">></span></span>不支持 JavaScript 的浏览器会使用 `<span class="token entity named-entity"><</span>noscript`<span class="token entity named-entity">></span> 元素中定义的内容（文本）来替代。<span class="token tag"><span class="token tag"><span class="token punctuation"></</span>p</span><span class="token punctuation">></span></span> </code></pre> <p><code>显示效果：</code></p> <blockquote> <p id="demo"> JavaScript 可以触发事件，就像按钮点击。</p> 抱歉，你的浏览器不支持 JavaScript! <p>不支持 JavaScript 的浏览器会使用 <noscript> 元素中定义的内容（文本）来替代。</p> <p>点我</p> </blockquote> <h3>22、字符实体</h3> <p>在 HTML 中，某些字符是预留的。在 HTML 中不能使用小于号（<）和大于号（>），这是因为浏览器会误认为它们是标签。</p> <p>如果希望正确地显示预留字符，我们必须在 HTML 源代码中使用字符实体（character entities）。 字符实体类似这样：</p> <p>如需显示小于号，我们必须这样写：<code>≪</code> 或 <code><</code> 或 <code><</code></p> <ul> <li> <p>使用实体名而不是数字的好处是，名称易于记忆。不过坏处是，浏览器也许并不支持所有实体名称（对实体数字的支持却很好）。</p> </li> <li> <p>实体名称对大小写敏感。</p> </li> </ul> <table> <thead> <tr> <th align="left">显示结果</th> <th align="left">描述</th> <th align="left">实体名称</th> <th align="left">实体编号</th> </tr> </thead> <tbody> <tr> <td align="left"></td> <td align="left">空格</td> <td align="left"><code> </code></td> <td align="left"><code> </code></td> </tr> <tr> <td align="left"><</td> <td align="left">小于号</td> <td align="left"><code><</code></td> <td align="left"><code><</code></td> </tr> <tr> <td align="left">></td> <td align="left">大于号</td> <td align="left"><code>></code></td> <td align="left"><code>></code></td> </tr> <tr> <td align="left">`&</td> <td align="left">和号</td> <td align="left"><code>&</code></td> <td align="left"><code>&</code></td> </tr> <tr> <td align="left">"</td> <td align="left">引号</td> <td align="left"><code>quot;</code></td> <td align="left"><code>"</code></td> </tr> <tr> <td align="left">’</td> <td align="left">撇号</td> <td align="left"><code>'</code> (IE不支持)</td> <td align="left"><code>'</code></td> </tr> <tr> <td align="left">￠</td> <td align="left">分</td> <td align="left"><code>¢</code></td> <td align="left"><code>¢</code></td> </tr> <tr> <td align="left">£</td> <td align="left">镑</td> <td align="left"><code>£</code></td> <td align="left"><code>£</code></td> </tr> <tr> <td align="left">¥</td> <td align="left">人民币/日元</td> <td align="left"><code>¥</code></td> <td align="left"><code>¥</code></td> </tr> <tr> <td align="left">€</td> <td align="left">欧元</td> <td align="left"><code>€</code></td> <td align="left"><code>€</code></td> </tr> <tr> <td align="left">§</td> <td align="left">小节</td> <td align="left"><code>§</code></td> <td align="left"><code>§</code></td> </tr> <tr> <td align="left">©</td> <td align="left">版权</td> <td align="left"><code>©</code></td> <td align="left"><code>©</code></td> </tr> <tr> <td align="left">®</td> <td align="left">注册商标</td> <td align="left"><code>®</code></td> <td align="left"><code>®</code></td> </tr> <tr> <td align="left">™</td> <td align="left">商标</td> <td align="left"><code>™</code></td> <td align="left"><code>™</code></td> </tr> <tr> <td align="left">×</td> <td align="left">乘号</td> <td align="left"><code>×</code></td> <td align="left"><code>×</code></td> </tr> <tr> <td align="left">÷</td> <td align="left">除号</td> <td align="left"><code>÷</code></td> <td align="left"><code>÷</code></td> </tr> </tbody> </table> <h3>23、URL</h3> <p>统一资源定位器(Uniform Resource Locators)URL。URL 是一个网页地址。</p> <ul> <li>URL可以由字母组成，如"runoob.com"，或互联网协议（IP）地址： 192.68.20.50。</li> <li>Web浏览器通过URL从Web服务器请求页面。</li> <li>当您点击 HTML 页面中的某个链接时，对应的 <code><a> </code>标签指向万维网上的一个地址。</li> </ul> <p></p> <div class="toc"> <h4>文章目录</h4> <ul> <li>02html基础详解</li> <li> <ul> <li>1、HTML编辑器</li> <li>2、标签</li> <li> <ul> <li>html常用标签</li> </ul> </li> <li>3、元素</li> <li>4、属性</li> <li> <ul> <li>常用属性</li> </ul> </li> <li>5、标题</li> <li> <ul> <li>水平线</li> <li>注释</li> </ul> </li> <li>6、段落</li> <li> <ul> <li>折行</li> </ul> </li> <li>7、格式化标签</li> <li> <ul> <li>属性dir</li> </ul> </li> <li>8、链接</li> <li> <ul> <li>属性target</li> <li>属性id</li> </ul> </li> <li>9、头部</li> <li> <ul> <li>标签head</li> <li>标签title</li> <li>标签base</li> <li>标签link</li> <li>标签style</li> <li>标签meta</li> <li>script元素</li> </ul> </li> <li>10、CSS</li> <li> <ul> <li>背景色属性background-color</li> <li>字体相关属性</li> <li>属性text-align</li> <li>内部样式表</li> <li>外部样式表</li> </ul> </li> <li>11、图像</li> <li> <ul> <li>标签image</li> <li>源属性src</li> <li>属性alt</li> <li>属性height和width</li> <li>属性float</li> <li>属性usemap</li> <li>属性title(image)</li> <li>属性border</li> </ul> </li> <li>12、标签map</li> <li>13、标签area</li> <li> <ul> <li>属性coords</li> <li>属性shape</li> <li>属性name（map）</li> </ul> </li> <li>14、表格</li> <li>15、列表</li> <li>16、区块</li> <li> <ul> <li>标签div</li> <li>标签span</li> </ul> </li> <li>17、布局</li> <li>18、表单</li> <li>19、框架</li> <li> <ul> <li>标签iframe</li> <li> <ul> <li>属性height</li> <li>属性width</li> <li>属性src</li> <li>属性frameborder</li> </ul> </li> </ul> </li> <li>20、颜色</li> <li> <ul> <li>属性rgba</li> </ul> </li> <li>21、脚本</li> <li> <ul> <li>标签script</li> <li>标签noscript</li> </ul> </li> <li>22、字符实体</li> <li>23、URL</li> </ul> </li> </ul> </div> <p></p> </div> </div> </div> </div> </div> <!--PC和WAP自适应版--> <div id="SOHUCS" sid="1720600844128301056"></div> <script type="text/javascript" src="/views/front/js/chanyan.js"></script> <!-- 文章页-底部 动态广告位 --> <div class="youdao-fixed-ad" id="detail_ad_bottom"></div> </div> <div class="col-md-3"> <div class="row" id="ad"> <!-- 文章页-右侧1 动态广告位 --> <div id="right-1" class="col-lg-12 col-md-12 col-sm-4 col-xs-4 ad"> <div class="youdao-fixed-ad" id="detail_ad_1"> </div> </div> <!-- 文章页-右侧2 动态广告位 --> <div id="right-2" class="col-lg-12 col-md-12 col-sm-4 col-xs-4 ad"> <div class="youdao-fixed-ad" id="detail_ad_2"></div> </div> <!-- 文章页-右侧3 动态广告位 --> <div id="right-3" class="col-lg-12 col-md-12 col-sm-4 col-xs-4 ad"> <div class="youdao-fixed-ad" id="detail_ad_3"></div> </div> </div> </div> </div> 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