【前端】HTML

文章目录

  • 前言
  • 1. HTML 概念
  • 2. HTML 常用标签
    • 2.1 段落与标题
    • 2.2 粗体与斜体
    • 2.3 删除线与下划线
    • 2.4 预格式与块
    • 2.5 图像与超链接
    • 2.6 列表与表格
    • 2.7 字体与内联窗口
    • 2.8 框
    • 2.9 按钮
    • 2.10 下拉选择与文本域
  • 3. 补充与总结
    • 3.1 如何理解“超文本标记语言”?
    • 3.2 总结
  • 参考教程

跟着大佬学前端之HTML

前言

随着时间的推移、科技的发展、社会的进步,各行业对工人的要求也越来越高。至于我们程序猿,越来越多的厂开始要求咱们具备全栈能力。最近咱大佬 @CaptinKoo 就玩上了嘛,承担起全栈的开发工作;我们单位也对前端有更多的需求,因此我决定今日起跟着@CaptinKoo学前端,一来在单位可以随时用上,二来拓宽技术栈,有空可以自己整点网站应用;拓宽技术栈总有好处滴。

学习目标

  • 学习 HTML 基础概念、常用标签
  • 学习常用标签的一些属性,用法。留个印象,用到再查,不必强记

工具选用
前端的常用集成工具有:VSCode、Hbuilder、IDEA、WebStorm等,无论是否初学,上述均可选用。

1. HTML 概念

HTML是什么
HTML (Hypertext Markup Language) 是用于创建网页的标记语言,称为超文本标记语言。

HTML基础结构
以下,我们用一个 HelloWorld 的例子来说明 HTML 的基础结构:

DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Hello Worldtitle>
head>
<body>
    
    <p>Hello World!p>
body>
html>

内容解析
我们先来解释一下上述例子的内容:

  • 标签告诉浏览器该文档是 HTML 文档。
  • 标签是 HTML 文档的根元素。它包含文档中的所有其他元素。
  • 标签包含有关文档的信息,例如标题、字符编码和元标签。
  • 标签指定文档的字符编码。
  • 标签告诉浏览器将文档缩放到适合设备屏幕宽度的大小。
  • </code>标签指定文档的标题。</li> <li><code><body></code>标签包含文档的主要内容。</li> <li><code><p></code>标签定义一个段落。接下来的学习中,我们会接触到更多不同功能的标签。</li> <li><code><p>Hello World!</p></code>标签包含文本“Hello World!”。</li> </ul> <p>一般情况下,我们学习与开发的过程中,主要关注<code><body></code>里的内容,及以后将要学习到的<code><style></code>、<code><script></code>等标签内容即可。关于上面解释的标签、属性等概念是什么,在下面的相关概念介绍:</p> <p><strong>相关概念</strong></p> <ul> <li><strong>标签</strong>:HTML由一套标记标签组成,通常就叫标签。一个标签通常由开始标签和结束标签组成。例如,这个示例的<code><body></code>是开始标签,<code></body></code>是结束标签,区别在于结束标签在标签名描述之前加了<code>/</code>。在接下来的学习中,我们会接触到自闭标签,意思是省略了结束标签的标签,例如,一个单独的<code><br></code>标签表示一个换行,省略了结束标签。有点混淆了?不用慌,常见的自闭标签只有几个,用到再查或者多练即可掌握。</li> <li><strong>注释</strong>:HTML 的注释由<code><!-- [注释内容] --></code>表示,和XML的注释格式是一致的,通常我们使用IDE工具快捷键生成即可。</li> <li><strong>元素</strong>:元素是指一个标签开始和结束之间的所有代码。例如,上述例子中的<code><p>Hello World!</p></code>,"Hello World!"就是<code><p></code>标签的元素。</li> <li><strong>属性</strong>:标签内的看似赋值的操作,称为属性。如上述例子的:<code><meta name="viewport" content="width=device-width, initial-scale=1.0"></code>," name=“viewport” " 就是一个属性。“name” 是属性名,“viewport” 是属性值,属性值应该用双引号括起来。</li> </ul> <h2>2. HTML 常用标签</h2> <p>这一小节介绍常见标签,篇幅关系,此处选用2个标签一组来学习。</p> <h3>2.1 段落与标题</h3> <p><strong>段落</strong><br> 在上文的 HelloWorld 示例中,我们的“Hello World!”文本是被p标签包裹的。p代表一个段落。段落会自动换行。</p> <p><strong>标题</strong><br> 标题会自动粗体,大写其中的内容,并且带有换行效果。<br> 一般会使用<code><h1></code>到 <code><h6></code>分别表示不同大小的标题,其中,数字越小,标题越大。</p> <p><strong>示例</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 punctuation">></span></span> <span class="token comment"><!-- normal text --></span> This is a normal text. This is a normal text. <span class="token comment"><!-- bold text --></span> <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>p</span><span class="token punctuation">></span></span>This is a p paragraph.<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>This is a p paragraph.<span class="token tag"><span class="token tag"><span class="token punctuation"></</span>p</span><span class="token punctuation">></span></span> <span class="token comment"><!-- h1 tag --></span> <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>h1</span><span class="token punctuation">></span></span>This is a h1 tag.<span class="token tag"><span class="token tag"><span class="token punctuation"></</span>h1</span><span class="token punctuation">></span></span> <span class="token comment"><!-- h2 tag --></span> <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>h2</span><span class="token punctuation">></span></span>This is a h2 tag.<span class="token tag"><span class="token tag"><span class="token punctuation"></</span>h2</span><span class="token punctuation">></span></span> <span class="token comment"><!-- h3 tag --></span> <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>h3</span><span class="token punctuation">></span></span>This is a h3 tag.<span class="token tag"><span class="token tag"><span class="token punctuation"></</span>h3</span><span class="token punctuation">></span></span> <span class="token comment"><!-- h4 tag --></span> <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>h4</span><span class="token punctuation">></span></span>This is a h4 tag.<span class="token tag"><span class="token tag"><span class="token punctuation"></</span>h4</span><span class="token punctuation">></span></span> <span class="token comment"><!-- h5 tag --></span> <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>h5</span><span class="token punctuation">></span></span>This is a h5 tag.<span class="token tag"><span class="token tag"><span class="token punctuation"></</span>h5</span><span class="token punctuation">></span></span> <span class="token comment"><!-- h6 tag --></span> <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>h6</span><span class="token punctuation">></span></span>This is a h6 tag.<span class="token tag"><span class="token tag"><span class="token punctuation"></</span>h6</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> <h3>2.2 粗体与斜体</h3> <p><strong>粗体</strong><br> 粗体主要由两个标签实现,b与strong标签。<br> b与strong标签粗体实现效果是一样的,但strong更多的是强调语义上的加重,提醒用户该文本的重要性。 在SEO(搜索引擎优化)的时候,也更加容易帮助用户找到重点的内容。一般情况下推荐使用strong。</p> <p><strong>斜体</strong><br> 斜体也主要由两个标签实现,i与em标签。<br> i是italic的缩写,仅仅表示该文本是斜体的,并不暗示这段文字的重要性。<br> em 是 Emphasized的缩写,虽然也是斜体,但是更多的是强调语义上的加重,提醒用户该文本的重要性。 常常用于引入新的术语的时候使用。</p> <p><strong>示例</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 punctuation">></span></span> <span class="token comment"><!-- b --></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>strong</span><span class="token punctuation">></span></span>This is a strong tag with strong text<span class="token tag"><span class="token tag"><span class="token punctuation"></</span>strong</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>p</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>This is a b tag with b text<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>p</span><span class="token punctuation">></span></span> <span class="token comment"><!-- i --></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>em</span><span class="token punctuation">></span></span>This is an em tag<span class="token tag"><span class="token tag"><span class="token punctuation"></</span>em</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>p</span><span class="token punctuation">></span></span><span class="token tag"><span class="token tag"><span class="token punctuation"><</span>i</span><span class="token punctuation">></span></span>This is an i tag<span class="token tag"><span class="token tag"><span class="token punctuation"></</span>i</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 comment"><!-- strong and em --></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>strong</span><span class="token punctuation">></span></span><span class="token tag"><span class="token tag"><span class="token punctuation"><</span>em</span><span class="token punctuation">></span></span>This is a strong and em tag<span class="token tag"><span class="token tag"><span class="token punctuation"></</span>em</span><span class="token punctuation">></span></span><span class="token tag"><span class="token tag"><span class="token punctuation"></</span>strong</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>body</span><span class="token punctuation">></span></span> </code></pre> <p>小补充:若需要复合的效果,如斜体加粗的段落,就可像上述的例子一样进行组合。</p> <h3>2.3 删除线与下划线</h3> <p><strong>删除线</strong><br> 删除线也有两种标签实现,del和s,但一般情况下,由于一些浏览器不支持s标签,因此建议使用del标签。</p> <p><strong>下划线</strong><br> 下划线也有两种标签实现,ins和u,一般情况下,也是语义侧重的原因,不建议使用u,因此我们掌握ins即可。特别地,由于超链接的形式和下划线也很像,实际开发中,非特殊原因不建议使用下划线。</p> <p><strong>示例</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 punctuation">></span></span> <span class="token comment"><!-- del --></span> <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>del</span><span class="token punctuation">></span></span>This text has been deleted.<span class="token tag"><span class="token tag"><span class="token punctuation"></</span>del</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 comment"><!-- s --></span> <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>s</span><span class="token punctuation">></span></span>This text has been struck through.Not suggest to use this tag.<span class="token tag"><span class="token tag"><span class="token punctuation"></</span>s</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 comment"><!-- ins --></span> <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>ins</span><span class="token punctuation">></span></span>This text has been inserted.<span class="token tag"><span class="token tag"><span class="token punctuation"></</span>ins</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 comment"><!-- u --></span> <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>u</span><span class="token punctuation">></span></span>This text has been underlined. Not suggest to use this tag.<span class="token tag"><span class="token tag"><span class="token punctuation"></</span>u</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>body</span><span class="token punctuation">></span></span> </code></pre> <p>小补充:此处的示例,我用了br自闭标签来换行。是的,br是一个换行,且自闭标签既可以省略<code>/</code>,也可以将<code>/</code>放到标签名之后,如上述例子所示。</p> <h3>2.4 预格式与块</h3> <p>这一小节的预格式实际用到较少,了解一下即可。块是需要重点掌握的。</p> <p><strong>预格式</strong><br> 预格式使用的是pre标签。预格式包裹的内容,可以根据其内容自动换行,以达到“预先格式化”的效果。</p> <p><strong>块</strong><br> 块有两种:span 与 div。块通常结合样式进行布局。块包裹一段代码,使用同一的块样式布局即可统一布局,增加代码复用性。</p> <ul> <li>div : 块级元素,常见的块元素 h1,table,p等</li> <li>span : 行内元素,也称内联元素,常见的内联元素还有 img,a,strong等</li> </ul> <p>块级与行内元素的直接可见的区别在于,div 自动换行,span 则不会。</p> <p><strong>示例</strong></p> <ul> <li>代码示例:</li> </ul> <pre><code class="prism language-html"><span class="token tag"><span class="token tag"><span class="token punctuation"><</span>body</span><span class="token punctuation">></span></span> <span class="token comment"><!-- without pre tag --></span> This is a normal text without any tag. It won't have any formatting. <span class="token comment"><!-- pre tag --></span> <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>pre</span><span class="token punctuation">></span></span> This is a pre tag. It is used to display preformatted text. It preserves the spaces and line breaks. <span class="token tag"><span class="token tag"><span class="token punctuation"></</span>pre</span><span class="token punctuation">></span></span> <span class="token comment"><!-- div tag --></span> <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>div</span> <span class="token style-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 style language-css"><span class="token property">background-color</span><span class="token punctuation">:</span> yellow<span class="token punctuation">;</span> <span class="token property">margin-left</span><span class="token punctuation">:</span>150px</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>p</span><span class="token punctuation">></span></span> This is a div tag. It is used to group content. <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>It can be styled using CSS.<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> <span class="token comment"><!-- span tag --></span> <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>p</span><span class="token punctuation">></span></span>This is a paragraph with <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>span</span> <span class="token style-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 style language-css"><span class="token property">background-color</span><span class="token punctuation">:</span> green<span class="token punctuation">;</span> <span class="token property">margin-left</span><span class="token punctuation">:</span>150px</span><span class="token punctuation">"</span></span></span><span class="token punctuation">></span></span>a green span<span class="token tag"><span class="token tag"><span class="token punctuation"></</span>span</span><span class="token punctuation">></span></span> inside it.<span class="token tag"><span class="token tag"><span class="token punctuation"></</span>p</span><span class="token punctuation">></span></span> <span class="token comment"><!-- different of div and 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>p</span><span class="token punctuation">></span></span>This is a paragraph inside a div.<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> <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>span</span><span class="token punctuation">></span></span> This is a paragraph inside a span. <span class="token tag"><span class="token tag"><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>span</span><span class="token punctuation">></span></span> This is a paragraph inside a span. <span class="token tag"><span class="token tag"><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>body</span><span class="token punctuation">></span></span> </code></pre> <ul> <li>效果示例图:<br> <a href="http://img.e-com-net.com/image/info8/80ccc1017262455ea16298fff08c02b4.jpg" target="_blank"><img src="http://img.e-com-net.com/image/info8/80ccc1017262455ea16298fff08c02b4.jpg" alt="【前端】HTML_第1张图片" width="650" height="257" style="border:1px solid black;"></a></li> </ul> <h3>2.5 图像与超链接</h3> <p><strong>图像</strong><br> 图像的标签是img。具体显示什么图像,图像的大小、布局,替换文字等,均用图像的属性来指定。一般若要显示不同目录的图像,使用相对路径或绝对路径。</p> <p><strong>超链接</strong><br> 超链接的标签是a。跳转的链接也由属性指定。</p> <p><strong>示例</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 punctuation">></span></span> <span class="token comment"><!-- img --></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>../images/title.png<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>Image<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>p</span><span class="token punctuation">></span></span>This is a test image is a test image <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>img</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>200px<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">src</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>../images/title.png<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>Image<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>p</span><span class="token punctuation">></span></span>This is an image with alt attribute and width and height<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>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.png<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>Image<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>p</span><span class="token punctuation">></span></span>This is an image ,didn't find, display alt<span class="token tag"><span class="token tag"><span class="token punctuation"></</span>p</span><span class="token punctuation">></span></span> <span class="token comment"><!-- a --></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://www.baidu.com/<span class="token punctuation">"</span></span><span class="token punctuation">></span></span>百度一下,你就知道<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>body</span><span class="token punctuation">></span></span> </code></pre> <h3>2.6 列表与表格</h3> <p><strong>列表</strong><br> 列表分为有序列表和无序列表,用ol和ul标签分别表示。列表标签内用li标签表示每一行。</p> <p><strong>表格</strong><br> 表格标签为table,由border属性设置边框。表格里th为表头,每一行为td标签,每一列为tr标签。</p> <p><strong>举例</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 punctuation">></span></span> <span class="token comment"><!-- ul --></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>Java<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>Python<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 comment"><!-- ol --></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>Java<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>Python<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 comment"><!-- table --></span> <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>table</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>Name<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>Age<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>Gender<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>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>John<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>25<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>Male<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>Mary<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>30<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>Female<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> <span class="token comment"><!-- table with border --></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 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>Name<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>Age<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>Gender<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>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>John<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>25<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>Male<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>Mary<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>30<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>Female<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> <span class="token tag"><span class="token tag"><span class="token punctuation"></</span>body</span><span class="token punctuation">></span></span> </code></pre> <p>除了可以使用CSS对 table 内的元素进行样式指定,table本身的属性可提供合并单元格、自定义大小等。</p> <pre><code class="prism language-html"><span class="token comment"><!-- table with attributes --></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">width</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>100%<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>100%<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>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>Table Title<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>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">bgcolor</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>#FF0000<span class="token punctuation">"</span></span><span class="token punctuation">></span></span>First Name<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>Last Name<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>Age<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>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>John<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>Doe<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>25<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>Jane<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>30<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">width</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>Mike<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>Johnson<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>40<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> <h3>2.7 字体与内联窗口</h3> <p>这一小节的内容实际用得相比其它标签用得不算太多,现阶段了解一下即可。</p> <p><strong>字体</strong><br> 字体用font标签描述,一般结合属性和样式使用。</p> <p><strong>内联窗口</strong><br> 内联窗口是iframe,表示一个独立窗口显示外部网页。</p> <p><strong>示例</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 punctuation">></span></span> <span class="token comment"><!-- font --></span> <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>p</span> <span class="token style-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 style language-css"><span class="token property">font-family</span><span class="token punctuation">:</span> Arial<span class="token punctuation">,</span> sans-serif<span class="token punctuation">;</span> <span class="token property">color</span><span class="token punctuation">:</span> blue<span class="token punctuation">;</span></span><span class="token punctuation">"</span></span></span><span class="token punctuation">></span></span>This is a paragraph with Arial font.<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 style-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 style language-css"><span class="token property">font-family</span><span class="token punctuation">:</span> Verdana<span class="token punctuation">,</span> sans-serif<span class="token punctuation">;</span> <span class="token property">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>This is a paragraph with Verdana font.<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 style-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 style language-css"><span class="token property">font-family</span><span class="token punctuation">:</span> Georgia<span class="token punctuation">,</span> serif<span class="token punctuation">;</span></span><span class="token punctuation">"</span></span></span><span class="token punctuation">></span></span>This is a paragraph with Georgia font.<span class="token tag"><span class="token tag"><span class="token punctuation"></</span>p</span><span class="token punctuation">></span></span> <span class="token comment"><!-- iframe --></span> <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://www.baidu.com<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 attr-name">height</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>300<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>body</span><span class="token punctuation">></span></span> </code></pre> <h3>2.8 框</h3> <p>框有文本、密码、单选、复选、时间、邮件等框。框用的是input标签,通过type属性指定类型,可以通过其它属性设置样式。input同时也是一个自闭标签,一般我们不需要写input的结束标签</p> <p>常见的框 对应的 type:</p> <table> <thead> <tr> <th>框</th> <th>type</th> </tr> </thead> <tbody> <tr> <td>文本框</td> <td>text</td> </tr> <tr> <td>密码框</td> <td>password</td> </tr> <tr> <td>单选框</td> <td>radio</td> </tr> <tr> <td>多选框</td> <td>checkbox</td> </tr> <tr> <td>时间框</td> <td>time</td> </tr> <tr> <td>邮件框</td> <td>email</td> </tr> <tr> <td>数字框</td> <td>number</td> </tr> </tbody> </table> <p><strong>举例</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 punctuation">></span></span> <span class="token comment"><!-- input type: text --></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>br</span><span class="token punctuation">></span></span> <span class="token comment"><!-- input type: text with placeholder --></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 attr-name">placeholder</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>Enter your 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 comment"><!-- input type: password --></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>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>br</span><span class="token punctuation">></span></span> <span class="token comment"><!-- input type: email --></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>email<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 comment"><!-- input type: number --></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>number<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 comment"><!-- input type: date --></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>date<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 comment"><!-- input type: time --></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>time<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 comment"><!-- input type: datetime-local --></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>datetime-local<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 comment"><!-- input type: file --></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>file<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 comment"><!-- input type: radio --></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">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>gender<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>Male <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>gender<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>Female <span class="token comment"><!-- input type: checkbox --></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">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 attr-name">name</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>interest<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>sports<span class="token punctuation">"</span></span><span class="token punctuation">></span></span>Sports <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 attr-name">name</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>interest<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>music<span class="token punctuation">"</span></span><span class="token punctuation">></span></span>Music <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 attr-name">name</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>interest<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>reading<span class="token punctuation">"</span></span><span class="token punctuation">></span></span>Reading <span class="token tag"><span class="token tag"><span class="token punctuation"></</span>body</span><span class="token punctuation">></span></span> </code></pre> <h3>2.9 按钮</h3> <p>按钮的标签也可以是 input ,不同的按钮也用不同的 type 表示。</p> <p>常见的 input 按钮 对应的 type:</p> <table> <thead> <tr> <th>按钮</th> <th>type</th> </tr> </thead> <tbody> <tr> <td>普通按钮</td> <td>button</td> </tr> <tr> <td>提交按钮</td> <td>submit</td> </tr> <tr> <td>重置按钮</td> <td>reset</td> </tr> </tbody> </table> <p>除了 input 按钮之外, button 标签也是 按钮。其中,button 标签的功能更加丰富。 input通常用于表单中,button 则用type=“submit”属性也可使其拥有提交能力。</p> <p><strong>示例</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 punctuation">></span></span> <span class="token comment"><!-- input type="button" value="Click Me" οnclick="alert('Hello World!')" --></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>button<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>Click Me<span class="token punctuation">"</span></span> <span class="token attr-name">onclick</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>location.href=<span class="token punctuation">'</span>https://www.baidu.com<span class="token punctuation">'</span><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>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>button<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>Reset<span class="token punctuation">"</span></span> <span class="token attr-name">onclick</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>location.href=<span class="token punctuation">'</span>https://www.baidu.com<span class="token punctuation">'</span><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>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>button<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 attr-name">onclick</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>location.href=<span class="token punctuation">'</span>https://www.baidu.com<span class="token punctuation">'</span><span class="token punctuation">"</span></span> <span class="token punctuation">/></span></span> <span class="token comment"><!-- button type="button" οnclick="alert('Hello World!')">Click Me</button> --></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 attr-name">onclick</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>location.href=<span class="token punctuation">'</span>https://www.baidu.com<span class="token punctuation">'</span><span class="token punctuation">"</span></span><span class="token punctuation">></span></span>Click Me<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>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 attr-name">onclick</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>location.href=<span class="token punctuation">'</span>https://www.baidu.com<span class="token punctuation">'</span><span class="token punctuation">"</span></span><span class="token punctuation">></span></span>Click Me<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>body</span><span class="token punctuation">></span></span> </code></pre> <h3>2.10 下拉选择与文本域</h3> <p><strong>下拉选择</strong><br> 下拉选择的标签是 select ,提供选择的元素用 option 标签包裹。</p> <p><strong>文本域</strong><br> 文本域的标签是 textarea 。</p> <p><strong>示例</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 punctuation">></span></span> <span class="token comment"><!-- select --></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>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>1<span class="token punctuation">"</span></span><span class="token punctuation">></span></span>Option 1<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>2<span class="token punctuation">"</span></span><span class="token punctuation">></span></span>Option 2<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>3<span class="token punctuation">"</span></span><span class="token punctuation">></span></span>Option 3<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 comment"><!-- textarea --></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>4<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>50<span class="token punctuation">"</span></span><span class="token punctuation">></span></span>Enter your text here<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>body</span><span class="token punctuation">></span></span> </code></pre> <h2>3. 补充与总结</h2> <h3>3.1 如何理解“超文本标记语言”?</h3> <ul> <li> <p>“超文本”(HyperText)指的是文本中包含的链接,可以通过点击链接跳转到其他页面或文档。</p> </li> <li> <p>“标记语言”(Markup Language)指的是用标记(标签)来定义文本的结构和样式。<br> 因此,HTML被称为超文本标记语言,是因为它可以创建包含链接的文本,并使用标记来定义文本的结构和样式。</p> </li> </ul> <p><em>上述解释来自</em> ——IT干货网</p> <h3>3.2 总结</h3> <p>本文我们学习了HTML 基础概念、基本结构 以及 常见HTML标签。HTML是网页的骨架,是前端的基础。后续CSS、JavaScript的学习都要基于HTML。</p> <p>对于标签的学习,我们一是要了解常见的标签及其功能,要留个印象。通常,都是用到再查,查其详细用法,以及常用属性。</p> <h2>参考教程</h2> <ul> <li>菜鸟教程</li> <li>how2j-优秀全栈教程</li> <li>IT干货网</li> <li>微软教程</li> </ul> </div> </div> </div> </div> </div> <!--PC和WAP自适应版--> <div id="SOHUCS" sid="1755829686715301888"></div> 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