-
HTML页面
HTML页面
HTML5介绍
HTML5是用来描述网页的一种语言，被称为超文本标记语言。用HTML5编写的文件，后缀以
.html结尾HTML是一种标记语言，标记语言是一套标记标签。
标签是由尖括号包围的关键字。
标签有两种表现形式：
- 双标签，例如：
- 单标签，例如：
HTML5基本骨架
DOCTYPE是
document type(文档类型) 的缩写。是H5的声明位于文档的最前面，处于标签之前。他是网页必备的组成部分，避免浏览器的怪异模式。
DOCTYPE html>- 1
定义 HTML 文档，其它元素要包裹在它里面，标签限定了文档的开始点和结束点。
DOCTYPE html> <html> html>- 1
- 2
- 3
head标签用于定义文档的头部。
文档的头部描述了文档的各种属性和信息，包括文档的标题、在 Web 中的位置以及和其他文档的关系等。
绝大多数文档头部包含的数据都不会真正作为内容显示给读者。
DOCTYPE html> <html> <head> head> html>- 1
- 2
- 3
- 4
- 5
body 元素定义文档的主体。
body 元素包含文档的所有内容（比如文本、超链接、图像、表格和列表等等。）
它会直接在页面中显示出来，也就是用户可以直观看到的内容。
DOCTYPE html> <html> <head> head> <body> 我会显示在浏览器中 body> html>- 1
- 2
- 3
- 4
- 5
- 6
- 7
- 8
标签
title标签
- 可定义文档的标题。
- 它显示在浏览器窗口的标题栏或状态栏上。
</code> 标签是 <code><head></code> 标签中唯一必须要求包含的东西，就是说写head一定要写title</li><li><code><title></code>的增加有利于SEO优化</li></ol> <pre data-index="4" class="set-code-show prettyprint"><code class="prism language-java has-numbering" onclick="mdcp.signin(event)" style="position: unset;"><span class="token operator"><</span><span class="token operator">!</span><span class="token constant">DOCTYPE</span> html<span class="token operator">></span> <span class="token generics"><span class="token punctuation"><</span>html<span class="token punctuation">></span></span> <span class="token generics"><span class="token punctuation"><</span>head<span class="token punctuation">></span></span> <span class="token generics"><span class="token punctuation"><</span>title<span class="token punctuation">></span></span>第一个页面<span class="token operator"><</span><span class="token operator">/</span>title<span class="token operator">></span> <span class="token operator"><</span><span class="token operator">/</span>head<span class="token operator">></span> <span class="token generics"><span class="token punctuation"><</span>body<span class="token punctuation">></span></span> 我会显示在浏览器中 <span class="token operator"><</span><span class="token operator">/</span>body<span class="token operator">></span> <span class="token operator"><</span><span class="token operator">/</span>html<span class="token operator">></span> <div class="hljs-button signin active" data-title="登录复制" data-report-click="{"spm":"1001.2101.3001.4334"}"></div></code><ul class="pre-numbering" style=""><li style="color: rgb(153, 153, 153);">1</li><li style="color: rgb(153, 153, 153);">2</li><li style="color: rgb(153, 153, 153);">3</li><li style="color: rgb(153, 153, 153);">4</li><li style="color: rgb(153, 153, 153);">5</li><li style="color: rgb(153, 153, 153);">6</li><li style="color: rgb(153, 153, 153);">7</li><li style="color: rgb(153, 153, 153);">8</li><li style="color: rgb(153, 153, 153);">9</li></ul></pre> <h4><a name="t6"></a><a id="meta_88"></a>meta标签</h4> <p>meta标签用来描述一个HTML网页文档的属性，关键词等</p> <p>如：<code>charset="utf-8"</code>是说当前使用的是<code>utf-8</code>编码格式</p> <pre data-index="5" class="set-code-show prettyprint"><code class="prism language-java has-numbering" onclick="mdcp.signin(event)" style="position: unset;"><span class="token operator"><</span><span class="token operator">!</span><span class="token constant">DOCTYPE</span> html<span class="token operator">></span> <span class="token operator"><</span>html lang<span class="token operator">=</span><span class="token string">"en"</span><span class="token operator">></span> <span class="token generics"><span class="token punctuation"><</span>head<span class="token punctuation">></span></span> <span class="token operator"><</span>meta charset<span class="token operator">=</span><span class="token string">"UTF-8"</span><span class="token operator">></span> <span class="token generics"><span class="token punctuation"><</span>title<span class="token punctuation">></span></span>it<span class="token operator"><</span><span class="token operator">/</span>title<span class="token operator">></span> <span class="token operator"><</span><span class="token operator">/</span>head<span class="token operator">></span> <span class="token generics"><span class="token punctuation"><</span>body<span class="token punctuation">></span></span> <span class="token operator"><</span><span class="token operator">/</span>body<span class="token operator">></span> <span class="token operator"><</span><span class="token operator">/</span>html<span class="token operator">></span> <div class="hljs-button signin active" data-title="登录复制" data-report-click="{"spm":"1001.2101.3001.4334"}"></div></code><ul class="pre-numbering" style=""><li style="color: rgb(153, 153, 153);">1</li><li style="color: rgb(153, 153, 153);">2</li><li style="color: rgb(153, 153, 153);">3</li><li style="color: rgb(153, 153, 153);">4</li><li style="color: rgb(153, 153, 153);">5</li><li style="color: rgb(153, 153, 153);">6</li><li style="color: rgb(153, 153, 153);">7</li><li style="color: rgb(153, 153, 153);">8</li><li style="color: rgb(153, 153, 153);">9</li></ul></pre> <h4><a name="t7"></a><a id="_106"></a>标题</h4> <p>标题（Heading）是通过 <code><h1> - <h6> </code>标签进行定义的。</p> <p><code><h1></code>定义最大的标题 <code><h6></code>定义最小的标题</p> <pre data-index="6" class="set-code-show prettyprint"><code class="prism language-java has-numbering" onclick="mdcp.signin(event)" style="position: unset;"><span class="token generics"><span class="token punctuation"><</span>h1<span class="token punctuation">></span></span>一级标题<span class="token operator"><</span><span class="token operator">/</span>h1<span class="token operator">></span> <span class="token generics"><span class="token punctuation"><</span>h2<span class="token punctuation">></span></span>二级标题<span class="token operator"><</span><span class="token operator">/</span>h2<span class="token operator">></span> <span class="token generics"><span class="token punctuation"><</span>h3<span class="token punctuation">></span></span>三级标题<span class="token operator"><</span><span class="token operator">/</span>h3<span class="token operator">></span> <span class="token generics"><span class="token punctuation"><</span>h4<span class="token punctuation">></span></span>四级标题<span class="token operator"><</span><span class="token operator">/</span>h4<span class="token operator">></span> <span class="token generics"><span class="token punctuation"><</span>h5<span class="token punctuation">></span></span>五级标题<span class="token operator"><</span><span class="token operator">/</span>h5<span class="token operator">></span> <span class="token generics"><span class="token punctuation"><</span>h6<span class="token punctuation">></span></span>六级标题<span class="token operator"><</span><span class="token operator">/</span>h6<span class="token operator">></span> <div class="hljs-button signin active" data-title="登录复制" data-report-click="{"spm":"1001.2101.3001.4334"}"></div></code><ul class="pre-numbering" style=""><li style="color: rgb(153, 153, 153);">1</li><li style="color: rgb(153, 153, 153);">2</li><li style="color: rgb(153, 153, 153);">3</li><li style="color: rgb(153, 153, 153);">4</li><li style="color: rgb(153, 153, 153);">5</li><li style="color: rgb(153, 153, 153);">6</li></ul></pre> <p>在标签中添加属性：<code>align="left | center | right"</code> 默认居左</p> <h4><a name="t8"></a><a id="_123"></a>段落</h4> <p>段落是通过<code><p></code>标签定义的</p> <pre data-index="7" class="set-code-show prettyprint"><code class="prism language-html has-numbering" onclick="mdcp.signin(event)" style="position: unset;"><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> <div class="hljs-button signin active" data-title="登录复制" data-report-click="{"spm":"1001.2101.3001.4334"}"></div></code><ul class="pre-numbering" style=""><li style="color: rgb(153, 153, 153);">1</li><li style="color: rgb(153, 153, 153);">2</li></ul></pre> <h4><a name="t9"></a><a id="_132"></a>换行</h4> <p>如果您希望在不产生一个新段落的情况下进行换行（新行），请使用 <code><br></code></p> <p><code><br /></code> 元素是一个空的 HTML 元素。</p> <pre data-index="8" class="set-code-show prettyprint"><code class="prism language-html has-numbering" onclick="mdcp.signin(event)" style="position: unset;"><span class="token tag"><span class="token tag"><span class="token punctuation"><</span>p</span><span class="token punctuation">></span></span>这个<span class="token tag"><span class="token tag"><span class="token punctuation"><</span>br</span><span class="token punctuation">></span></span>段落<span class="token tag"><span class="token tag"><span class="token punctuation"><</span>br</span><span class="token punctuation">></span></span>演示了分行的效果<span class="token tag"><span class="token tag"><span class="token punctuation"></</span>p</span><span class="token punctuation">></span></span> <div class="hljs-button signin active" data-title="登录复制" data-report-click="{"spm":"1001.2101.3001.4334"}"></div></code><ul class="pre-numbering" style=""><li style="color: rgb(153, 153, 153);">1</li></ul></pre> <h4><a name="t10"></a><a id="_142"></a>水平线</h4> <p><code><hr/></code>标签在 HTML 页面中创建水平线</p> <pre data-index="9" class="set-code-show prettyprint"><code class="prism language-html has-numbering" onclick="mdcp.signin(event)" style="position: unset;"><span class="token tag"><span class="token tag"><span class="token punctuation"><</span>hr</span> <span class="token attr-name">color</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">width</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">size</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">align</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 punctuation">/></span></span> <div class="hljs-button signin active" data-title="登录复制" data-report-click="{"spm":"1001.2101.3001.4334"}"></div></code><ul class="pre-numbering" style=""><li style="color: rgb(153, 153, 153);">1</li></ul></pre> <p>属性：</p> <ol><li>color：设置水平线的颜色</li><li>width：设置水平线的宽度</li><li>size：设置水平线的高度</li><li>align：设置水平线的对齐方式（默认居中），可取值left|right</li></ol> <h4><a name="t11"></a><a id="_157"></a>图片</h4> <p><code><img></code> 标签定义 HTML 页面中的图像，<code><img></code>是单标签</p> <pre data-index="10" class="set-code-show prettyprint"><code class="prism language-html has-numbering" onclick="mdcp.signin(event)" style="position: unset;"><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><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><span class="token punctuation">"</span></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><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><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><span class="token punctuation">"</span></span><span class="token punctuation">></span></span> <div class="hljs-button signin active" data-title="登录复制" data-report-click="{"spm":"1001.2101.3001.4334"}"></div></code><ul class="pre-numbering" style=""><li style="color: rgb(153, 153, 153);">1</li></ul></pre> <p>属性：</p> <ol><li>src：路径（图片地址与名字）</li><li>alt：规定图像的替代文本(图片显示不了时)</li><li>width：规定图像的宽度</li><li>height：规定图像的高度</li><li>title：鼠标悬停在图片上给予提示</li></ol> <p>图片路径支持：绝对路径，相对路径，网络路径</p> <h4><a name="t12"></a><a id="_175"></a>超链接</h4> <p>HTML使用标签 <code><a></code>来设置超文本链接</p> <p>超链接可以是一个字，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</p> <pre data-index="11" class="set-code-show prettyprint"><code class="prism language-html has-numbering" onclick="mdcp.signin(event)" style="position: unset;"><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>url<span class="token punctuation">"</span></span><span class="token punctuation">></span></span>链接文本<span class="token tag"><span class="token tag"><span class="token punctuation"></</span>a</span><span class="token punctuation">></span></span> <div class="hljs-button signin active" data-title="登录复制" data-report-click="{"spm":"1001.2101.3001.4334"}"></div></code><ul class="pre-numbering" style=""><li style="color: rgb(153, 153, 153);">1</li></ul></pre> <p>在标签<code><a> </code>中使用了<code>href</code>属性来描述链接的地址</p> <p>默认情况下，链接将以，以下形式出现在浏览器中：</p> <ol><li> <p>一个未访问过的链接显示为蓝色字体并带有下划线。</p> </li><li> <p>访问过的链接显示为紫色并带有下划线。</p> </li><li> <p>点击链接时，链接显示为红色并带有下划线。</p> </li></ol> <p>指定页面上的一个锚点进行滚动：</p> <pre data-index="12" class="set-code-show prettyprint"><code class="prism language-html has-numbering" onclick="mdcp.signin(event)" style="position: unset;"><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>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>#test<span class="token punctuation">"</span></span><span class="token punctuation">></span></span>跳转锚点<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>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>image.jpeg<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>500<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>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>image.jpeg<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>500<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>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>image.jpeg<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>500<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>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>image.jpeg<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>500<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>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>test<span class="token punctuation">"</span></span><span class="token punctuation">></span></span>我是锚点<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>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>image.jpeg<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>500<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>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>image.jpeg<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>500<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>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>image.jpeg<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>500<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>body</span><span class="token punctuation">></span></span> <div class="hljs-button signin active" data-title="登录复制" data-report-click="{"spm":"1001.2101.3001.4334"}"></div></code><ul class="pre-numbering" style=""><li style="color: rgb(153, 153, 153);">1</li><li style="color: rgb(153, 153, 153);">2</li><li style="color: rgb(153, 153, 153);">3</li><li style="color: rgb(153, 153, 153);">4</li><li style="color: rgb(153, 153, 153);">5</li><li style="color: rgb(153, 153, 153);">6</li><li style="color: rgb(153, 153, 153);">7</li><li style="color: rgb(153, 153, 153);">8</li><li style="color: rgb(153, 153, 153);">9</li><li style="color: rgb(153, 153, 153);">10</li><li style="color: rgb(153, 153, 153);">11</li></ul></pre> <h4><a name="t13"></a><a id="_213"></a>常用文本标签</h4> <div class="table-box"><table><thead><tr><th align="center">标签</th><th align="center">描述</th></tr></thead><tbody><tr><td align="center"><code><em></code></td><td align="center">定义着重文字</td></tr><tr><td align="center"><code><b></code></td><td align="center">定义粗体文本</td></tr><tr><td align="center"><code><i></code></td><td align="center">定义斜体字</td></tr><tr><td align="center"><code><strong></code></td><td align="center">定义加重语气</td></tr><tr><td align="center"><code><del></code></td><td align="center">定义删除字</td></tr><tr><td align="center"><code><span></code></td><td align="center">元素没有特定的含义</td></tr></tbody></table></div> <p>常用文本标签和段落是不同的，段落代表一段文本，而文本标签一般表示文本词汇</p> <h4><a name="t14"></a><a id="_226"></a>有序列表</h4> <p>有序列表是一列项目，列表项目使用数字进行标记。</p> <p>有序列表始于<code> <ol></code> 标签。每个列表项始于 <code><li> </code>标签。</p> <p>列表是可以进行嵌套的</p> <pre data-index="13" class="set-code-show prettyprint"><code class="prism language-html has-numbering" onclick="mdcp.signin(event)" style="position: unset;"><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><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><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> <div class="hljs-button signin active" data-title="登录复制" data-report-click="{"spm":"1001.2101.3001.4334"}"></div></code><ul class="pre-numbering" style=""><li style="color: rgb(153, 153, 153);">1</li><li style="color: rgb(153, 153, 153);">2</li><li style="color: rgb(153, 153, 153);">3</li><li style="color: rgb(153, 153, 153);">4</li></ul></pre> <p><code><ol></code>的属性type 拥有的选项</p> <ol><li>1 表示列表项目用数字标号（1,2,3…）</li><li>a 表示列表项目用小写字母标号（a,b,c…）</li><li>A 表示列表项目用大写字母标号（A,B,C…）</li><li>i 表示列表项目用小写罗马数字标号（i,ii,iii…）</li><li>I 表示列表项目用大写罗马数字标号（I,II,III…）</li></ol> <h4><a name="t15"></a><a id="_249"></a>无序列表</h4> <p>无序列表是一个项目的列表，此列项目使用粗体圆点（典型的小黑圆圈）进行标记。</p> <p>无序列表始于 <code><ul></code> 标签。每个列表项始于<code> <li></code> 标签。</p> <p>列表是可以进行嵌套的。</p> <pre data-index="14" class="set-code-show prettyprint"><code class="prism language-html has-numbering" onclick="mdcp.signin(event)" style="position: unset;"><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> <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> <span class="token tag"><span class="token tag"><span class="token punctuation"></</span>ul</span><span class="token punctuation">></span></span> <div class="hljs-button signin active" data-title="登录复制" data-report-click="{"spm":"1001.2101.3001.4334"}"></div></code><ul class="pre-numbering" style=""><li style="color: rgb(153, 153, 153);">1</li><li style="color: rgb(153, 153, 153);">2</li><li style="color: rgb(153, 153, 153);">3</li><li style="color: rgb(153, 153, 153);">4</li></ul></pre> <p><code><ul></code>的属性type 拥有的选项</p> <ul><li> <p>disc 默认实心圆</p> </li><li> <p>circle 空心圆</p> </li><li> <p>square 小方块</p> </li><li> <p>none 不显示</p> </li></ul> <h4><a name="t16"></a><a id="_274"></a>表格</h4> <p>表格：<code><table></code></p> <p>行：<code><tr></code></p> <p>单元格(列)：<code><td></code></p> <p>表格属性：</p> <ol><li>border：设置表格的边框</li><li>width：设置表格的宽度</li><li>height：设置表格的高度</li></ol> <p>单元格合并属性：</p> <ul><li>水平合并：colspan</li><li>垂直合并：rowspan</li></ul> <pre data-index="15" class="set-code-hide prettyprint"><code class="prism language-html has-numbering" onclick="mdcp.signin(event)" style="position: unset;"><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">width</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>500px<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>200px<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>3<span class="token punctuation">"</span></span><span class="token punctuation">></span></span>单元格1单元格2单元格3<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>单元格4<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>单元格5<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">rowspan</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 punctuation">></span></span>单元格6-11<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>单元格7<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>单元格81318<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">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 attr-name">rowspan</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 punctuation">></span></span>单元格9101415<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>单元格12<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>单元格16<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>单元格17<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>单元格19<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>单元格20<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> <div class="hljs-button signin active" data-title="登录复制" data-report-click="{"spm":"1001.2101.3001.4334"}"></div></code><div class="hide-preCode-box"><span class="hide-preCode-bt" data-report-view="{"spm":"1001.2101.3001.7365"}"><img class="look-more-preCode contentImg-no-view" src="https://1000bd.com/contentImg/2022/06/27/191644837.png" alt="" title=""></span></div><ul class="pre-numbering" style=""><li style="color: rgb(153, 153, 153);">1</li><li style="color: rgb(153, 153, 153);">2</li><li style="color: rgb(153, 153, 153);">3</li><li style="color: rgb(153, 153, 153);">4</li><li style="color: rgb(153, 153, 153);">5</li><li style="color: rgb(153, 153, 153);">6</li><li style="color: rgb(153, 153, 153);">7</li><li style="color: rgb(153, 153, 153);">8</li><li style="color: rgb(153, 153, 153);">9</li><li style="color: rgb(153, 153, 153);">10</li><li style="color: rgb(153, 153, 153);">11</li><li style="color: rgb(153, 153, 153);">12</li><li style="color: rgb(153, 153, 153);">13</li><li style="color: rgb(153, 153, 153);">14</li><li style="color: rgb(153, 153, 153);">15</li><li style="color: rgb(153, 153, 153);">16</li><li style="color: rgb(153, 153, 153);">17</li><li style="color: rgb(153, 153, 153);">18</li><li style="color: rgb(153, 153, 153);">19</li><li style="color: rgb(153, 153, 153);">20</li><li style="color: rgb(153, 153, 153);">21</li><li style="color: rgb(153, 153, 153);">22</li></ul></pre> <h4><a name="t17"></a><a id="Form_318"></a>Form表单</h4> <p>对于一个输入框，我们一般会将其包括在一个<code>lable</code>标签中，它和span效果一样，但是我们点击前面文字也能快速获取输入框焦点。</p> <pre data-index="16" class="set-code-hide prettyprint"><code class="prism language-html has-numbering" onclick="mdcp.signin(event)" style="position: unset;"><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>div</span><span class="token punctuation">></span></span>登陆我们的网站<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>hr</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>label</span><span class="token punctuation">></span></span> 账号： <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 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>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> <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>label</span><span class="token punctuation">></span></span> 密码： <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>password<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>div</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> <div class="hljs-button signin active" data-title="登录复制" data-report-click="{"spm":"1001.2101.3001.4334"}"></div></code><div class="hide-preCode-box"><span class="hide-preCode-bt" data-report-view="{"spm":"1001.2101.3001.7365"}"><img class="look-more-preCode contentImg-no-view" src="https://1000bd.com/contentImg/2022/06/27/191644837.png" alt="" title=""></span></div><ul class="pre-numbering" style=""><li style="color: rgb(153, 153, 153);">1</li><li style="color: rgb(153, 153, 153);">2</li><li style="color: rgb(153, 153, 153);">3</li><li style="color: rgb(153, 153, 153);">4</li><li style="color: rgb(153, 153, 153);">5</li><li style="color: rgb(153, 153, 153);">6</li><li style="color: rgb(153, 153, 153);">7</li><li style="color: rgb(153, 153, 153);">8</li><li style="color: rgb(153, 153, 153);">9</li><li style="color: rgb(153, 153, 153);">10</li><li style="color: rgb(153, 153, 153);">11</li><li style="color: rgb(153, 153, 153);">12</li><li style="color: rgb(153, 153, 153);">13</li><li style="color: rgb(153, 153, 153);">14</li><li style="color: rgb(153, 153, 153);">15</li><li style="color: rgb(153, 153, 153);">16</li></ul></pre> <p>表单是由容器和控件组成的，一个表单一般应该包含用户填写信息的输入框,按钮等</p> <pre data-index="17" class="set-code-show prettyprint"><code class="prism language-html has-numbering" onclick="mdcp.signin(event)" style="position: unset;"><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>url<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>get|post<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>myform<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>form</span><span class="token punctuation">></span></span> <div class="hljs-button signin active" data-title="登录复制" data-report-click="{"spm":"1001.2101.3001.4334"}"></div></code><ul class="pre-numbering" style=""><li style="color: rgb(153, 153, 153);">1</li></ul></pre> <blockquote> <p><strong>属性说明</strong></p> <p>action服务器地址</p> <p>name表单名称</p> <p><strong>method中Get和Post的区别</strong></p> <ol><li>数据提交方式，get把提交的数据url可以看到，post看不到</li><li>get一般用于提交少量数据，post用来提交大量数据</li></ol> </blockquote> <p>一个完整的表单包含三个基本组成部分：表单标签、表单域、表单按钮</p> <ol><li>表单标签</li><li>表单域</li><li>表单按钮</li></ol> <pre data-index="18" class="set-code-show prettyprint"><code class="prism language-html has-numbering" onclick="mdcp.signin(event)" style="position: unset;"><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>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 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 punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"></</span>form</span><span class="token punctuation">></span></span> <div class="hljs-button signin active" data-title="登录复制" data-report-click="{"spm":"1001.2101.3001.4334"}"></div></code><ul class="pre-numbering" style=""><li style="color: rgb(153, 153, 153);">1</li><li style="color: rgb(153, 153, 153);">2</li><li style="color: rgb(153, 153, 153);">3</li><li style="color: rgb(153, 153, 153);">4</li></ul></pre> <p>文本域通过<code><input type="text"></code> 标签来设定，当用户要在表单中键入字母、数字等内容时，就会用到文本域</p> <pre data-index="19" class="set-code-show prettyprint"><code class="prism language-html has-numbering" onclick="mdcp.signin(event)" style="position: unset;"><span class="token tag"><span class="token tag"><span class="token punctuation"><</span>form</span><span class="token punctuation">></span></span> First name: <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>firstname<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> Last name: <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>lastname<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>form</span><span class="token punctuation">></span></span> <div class="hljs-button signin active" data-title="登录复制" data-report-click="{"spm":"1001.2101.3001.4334"}"></div></code><ul class="pre-numbering" style=""><li style="color: rgb(153, 153, 153);">1</li><li style="color: rgb(153, 153, 153);">2</li><li style="color: rgb(153, 153, 153);">3</li><li style="color: rgb(153, 153, 153);">4</li><li style="color: rgb(153, 153, 153);">5</li></ul></pre> <p>密码字段通过标签<code><input type="password"></code> 来定义</p> <p>密码字段字符不会明文显示，而是以星号或圆点替代</p> <pre data-index="20" class="set-code-show prettyprint"><code class="prism language-html has-numbering" onclick="mdcp.signin(event)" style="position: unset;"><span class="token tag"><span class="token tag"><span class="token punctuation"><</span>form</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>password<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>pwd<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>form</span><span class="token punctuation">></span></span> <div class="hljs-button signin active" data-title="登录复制" data-report-click="{"spm":"1001.2101.3001.4334"}"></div></code><ul class="pre-numbering" style=""><li style="color: rgb(153, 153, 153);">1</li><li style="color: rgb(153, 153, 153);">2</li><li style="color: rgb(153, 153, 153);">3</li></ul></pre> <p>用户单击确认按钮时，表单的内容会被传送到另一个文件。</p> <p>表单的动作属性定义了目的文件的文件名。</p> <p>由动作属性定义的这个文件通常会对接收到的输入数据进行相关的处理。</p> <pre data-index="21" class="set-code-show prettyprint"><code class="prism language-html has-numbering" onclick="mdcp.signin(event)" style="position: unset;"><span class="token tag"><span class="token tag"><span class="token punctuation"><</span>form</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>input<span class="token punctuation">"</span></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>url<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>get<span class="token punctuation">"</span></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>user<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>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>Submit<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>form</span><span class="token punctuation">></span></span> <div class="hljs-button signin active" data-title="登录复制" data-report-click="{"spm":"1001.2101.3001.4334"}"></div></code><ul class="pre-numbering" style=""><li style="color: rgb(153, 153, 153);">1</li><li style="color: rgb(153, 153, 153);">2</li><li style="color: rgb(153, 153, 153);">3</li><li style="color: rgb(153, 153, 153);">4</li></ul></pre> <h4><a name="t18"></a><a id="_404"></a>框</h4> <p>在页面中添加勾选框：</p> <pre data-index="22" class="set-code-show prettyprint"><code class="prism language-html has-numbering" onclick="mdcp.signin(event)" style="position: unset;"><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>checkbox<span class="token punctuation">"</span></span><span class="token punctuation">></span></span> 我同意本网站的隐私政策 <span class="token tag"><span class="token tag"><span class="token punctuation"></</span>label</span><span class="token punctuation">></span></span> <div class="hljs-button signin active" data-title="登录复制" data-report-click="{"spm":"1001.2101.3001.4334"}"></div></code><ul class="pre-numbering" style=""><li style="color: rgb(153, 153, 153);">1</li><li style="color: rgb(153, 153, 153);">2</li><li style="color: rgb(153, 153, 153);">3</li><li style="color: rgb(153, 153, 153);">4</li></ul></pre> <p>单选框：</p> <pre data-index="23" class="set-code-show prettyprint"><code class="prism language-html has-numbering" onclick="mdcp.signin(event)" style="position: unset;"><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>role<span class="token punctuation">"</span></span><span class="token punctuation">></span></span> 学生 <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>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>role<span class="token punctuation">"</span></span><span class="token punctuation">></span></span> 教师 <span class="token tag"><span class="token tag"><span class="token punctuation"></</span>label</span><span class="token punctuation">></span></span> <div class="hljs-button signin active" data-title="登录复制" data-report-click="{"spm":"1001.2101.3001.4334"}"></div></code><ul class="pre-numbering" style=""><li style="color: rgb(153, 153, 153);">1</li><li style="color: rgb(153, 153, 153);">2</li><li style="color: rgb(153, 153, 153);">3</li><li style="color: rgb(153, 153, 153);">4</li><li style="color: rgb(153, 153, 153);">5</li><li style="color: rgb(153, 153, 153);">6</li><li style="color: rgb(153, 153, 153);">7</li><li style="color: rgb(153, 153, 153);">8</li></ul></pre> <p>使用name属性进行分组，同一个组内的选项只能选择一个。</p> <p>下拉列表：</p> <pre data-index="24" class="set-code-show prettyprint"><code class="prism language-html has-numbering" onclick="mdcp.signin(event)" style="position: unset;"><span class="token tag"><span class="token tag"><span class="token punctuation"><</span>label</span><span class="token punctuation">></span></span> 登陆身份： <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 punctuation">></span></span>学生<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 punctuation">></span></span>教师<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>label</span><span class="token punctuation">></span></span> <div class="hljs-button signin active" data-title="登录复制" data-report-click="{"spm":"1001.2101.3001.4334"}"></div></code><ul class="pre-numbering" style=""><li style="color: rgb(153, 153, 153);">1</li><li style="color: rgb(153, 153, 153);">2</li><li style="color: rgb(153, 153, 153);">3</li><li style="color: rgb(153, 153, 153);">4</li><li style="color: rgb(153, 153, 153);">5</li><li style="color: rgb(153, 153, 153);">6</li><li style="color: rgb(153, 153, 153);">7</li></ul></pre> <p>默认选取的是第一个选项，我们可以通过<code>selected</code>属性来决定默认使用的是哪个选项。</p> </div> </div> </li> <li class="list-group-item ul-li"> <b>相关阅读:</b><br> <nobr> <a href="/Article/Index/1412295">CLion更改大括号位置</a> <br /> <a href="/Article/Index/663308">Leetcode 137. Single Number II (Python)</a> <br /> <a href="/Article/Index/751258">手撕SparkSQL五大JOIN的底层机制</a> <br /> <a href="/Article/Index/857352">彻底搞懂vertical-align 底线、基线、中线的含义</a> <br /> <a href="/Article/Index/797923">AutoSAR EcuM系列03- Flex EcuM的状态管理</a> <br /> <a href="/Article/Index/1093748">洛谷P4549 裴蜀定理模板</a> <br /> <a href="/Article/Index/1656422">Java Stream流</a> <br /> <a href="/Article/Index/959234">[Spring Boot 2]整合持久层技术</a> <br /> <a href="/Article/Index/922057">记某同事的两次误操作导致Linux瘫痪</a> <br /> <a href="/Article/Index/1495827">Python 潮流周刊#39：Rust 开发的性能超快的打包工具</a> <br /> </nobr> </li> <li class="list-group-item from-a mb-2"> 原文地址：https://blog.csdn.net/CS_z_jun/article/details/133965583 </li> </ul> </div> <div class="col-lg-4 col-sm-12"> <ul class="list-group" style="word-break:break-all;"> <li class="list-group-item ul-li-bg" aria-current="true"> 最新文章 </li> <li class="list-group-item ul-li"> <nobr> <a href="/Article/Index/1484446">攻防演习之三天拿下官网站群</a> <br /> <a href="/Article/Index/1515268">数据安全治理学习——前期安全规划和安全管理体系建设</a> <br /> <a href="/Article/Index/1759065">企业安全 | 企业内一次钓鱼演练准备过程</a> <br /> <a href="/Article/Index/1485036">内网渗透测试 | Kerberos协议及其部分攻击手法</a> <br /> <a href="/Article/Index/1877332">0day的产生 | 不懂代码的"代码审计"</a> <br /> <a href="/Article/Index/1887576">安装scrcpy-client模块av模块异常，环境问题解决方案</a> <br /> <a href="/Article/Index/1887578">leetcode hot100【LeetCode 279. 完全平方数】java实现</a> <br /> <a href="/Article/Index/1887512">OpenWrt下安装Mosquitto</a> <br /> <a href="/Article/Index/1887520">AnatoMask论文汇总</a> <br /> <a href="/Article/Index/1887496">【AI日记】24.11.01 LangChain、openai api和github copilot</a> <br /> </nobr> </li> </ul> <ul class="list-group pt-2" style="word-break:break-all;"> <li class="list-group-item ul-li-bg" aria-current="true"> 热门文章 </li> <li class="list-group-item ul-li"> <nobr> <a href="/Article/Index/888177">十款代码表白小特效 一个比一个浪漫 赶紧收藏起来吧！！！</a> <br /> <a href="/Article/Index/797680">奉劝各位学弟学妹们，该打造你的技术影响力了！</a> <br /> <a href="/Article/Index/888183">五年了，我在 CSDN 的两个一百万。</a> <br /> <a href="/Article/Index/888179">Java俄罗斯方块，老程序员花了一个周末，连接中学年代！</a> <br /> <a href="/Article/Index/797730">面试官都震惊，你这网络基础可以啊！</a> <br /> <a href="/Article/Index/797725">你真的会用百度吗？我不信 — 那些不为人知的搜索引擎语法</a> <br /> <a href="/Article/Index/797702">心情不好的时候，用 Python 画棵樱花树送给自己吧</a> <br /> <a href="/Article/Index/797709">通宵一晚做出来的一款类似CS的第一人称射击游戏Demo！原来做游戏也不是很难，连憨憨学妹都学会了！</a> <br /> <a href="/Article/Index/797716">13 万字 C 语言从入门到精通保姆级教程2021 年版</a> <br /> <a href="/Article/Index/888192">10行代码集2000张美女图，Python爬虫120例，再上征途</a> <br /> </nobr> </li> </ul> </div> </div> </div> <!-- 主体 --> <!--body结束--> <!--这里是footer模板--> <!--footer--> <nav class="navbar navbar-inverse navbar-fixed-bottom"> <div class="container"> <div class="row"> <div class="col-md-12"> <div class="text-muted center foot-height"> Copyright © 2022 侵权请联系<a href="mailto:2656653265@qq.com">2656653265@qq.com</a> <a href="https://beian.miit.gov.cn/" target="_blank">京ICP备2022015340号-1</a> </div> <div style="width:300px;margin:0 auto; padding:0px 5px;"> <a href="/regex.html">正则表达式工具</a> <a href="/cron.html">cron表达式工具</a> <a href="/pwdcreator.html">密码生成工具</a> </div> <div style="width:300px;margin:0 auto; padding:5px 0;"> <a target="_blank" href="http://www.beian.gov.cn/portal/registerSystemInfo?recordcode=11010502049817" style="display:inline-block;text-decoration:none;height:20px;line-height:20px;"> <img src="" style="float:left;" /><p style="float:left;height:20px;line-height:20px;margin: 0px 0px 0px 5px; color:#939393;">京公网安备 11010502049817号</p></a> </div> </div> </div> </div> </nav> <!--footer--> <!--footer模板结束--> <script src="/js/plugins/jquery/jquery.js"></script> <script src="/js/bootstrap.min.js"></script> <!--这里是scripts模板--> <!--scripts模板结束--> </body> </html>
- 双标签，例如：