HTML中不熟的知识点

梳理一些HTML中不熟悉的知识点


HTML的文档结构

              
<html lang="en">             
<head>
	<meta charset="UTF-8">   
	<title>Documenttitle>  
head>
<body> 
	                         
body>
html>


基本常用标签

html总共有两种标签
单标签
单标签就是只用一个标签就可以使用了,不需要成对


等等…
双标签
双标签需要成对使用
<body> <table> <tr> <td> <span> <p></code> </dd> <dd> <code><form> <h1-h6> <style> <strong> <i> <div> <a> <script></code> <br> 等等… </dd> </dl> <p><br></p> <p><br></p> <h1>表单</h1> <dl> 什么是表单? <dd> 表单用于搜集不同类型的用户输入( 收集数据 ) </dd> 什么情况下使用表单? <dd> 登陆、注册 表格 需要提交的场景 都会用表单 <br> <br> </dd> </dl> <h5>表单标签</h5> <h6><code><form></code>标签的使用</h6> <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 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">=</span><span class="token punctuation">"</span><span class="token punctuation">"</span></span> <span class="token attr-name">method</span><span class="token attr-value"><span class="token punctuation">=</span><span class="token punctuation">"</span>GET<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> <span class="token tag"><span class="token tag"><span class="token punctuation"></</span>body</span><span class="token punctuation">></span></span> </code></pre> <dl> <code>action</code> 的作用 (" 这里面填写你想跳转的路径 ") <dd> 表单提交路径 </dd> <dd> 具有跳转的功能 </dd> <code>method</code> 属性 ( 提交方式 ) <dd> get方法 </dd> <dd> post方法 </dd> </dl> <br> <p><code>get</code> 方法实例:</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 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">=</span><span class="token punctuation">"</span><span class="token punctuation">"</span></span> <span class="token attr-name">method</span><span class="token attr-value"><span class="token punctuation">=</span><span class="token punctuation">"</span>GET<span class="token punctuation">"</span></span><span class="token punctuation">></span></span> 请输入你的名字:<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">=</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">=</span><span class="token punctuation">"</span>myname<span class="token punctuation">"</span></span> <span class="token attr-name">id</span><span class="token attr-value"><span class="token punctuation">=</span><span class="token punctuation">"</span>myname<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> 请输入你的密码:<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">=</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">=</span><span class="token punctuation">"</span>pwd<span class="token punctuation">"</span></span> <span class="token attr-name">id</span><span class="token attr-value"><span class="token punctuation">=</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>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">=</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">=</span><span class="token punctuation">"</span>提交<span class="token punctuation">"</span></span> <span class="token punctuation">/></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"></</span>form</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> <br> <p>这个方法在输入完用户信息之后,点击提交按钮,他会把你所输入的全部信息打印到地址栏上,如图:</p> <p><a href="http://img.e-com-net.com/image/info8/b5df4265d22740c18ed33ead31de4f8c.png" target="_blank"><img src="http://img.e-com-net.com/image/info8/b5df4265d22740c18ed33ead31de4f8c.png" alt="HTML中不熟的知识点_第1张图片" width="639" height="186" style="border:1px solid black;"></a><br> 从图片就可以看出,这种方法并不安全,会泄露你输入的信息,所以信息安全,一般使用 <code>post</code> 方法<br> <br><br> 这里再说一下地址栏上上的信息:<br> myname 前的 <strong>? 表示路径的跳转地址结束</strong><br> 王五 和 pwd之间的 <strong>& 表示属性之间的间隔</strong></p> <p><br></p> <p>下面展示一下 <code>post</code> 的地址栏:<br> <a href="http://img.e-com-net.com/image/info8/3b65a491438d4c34adc66ab16f860cb3.png" target="_blank"><img src="http://img.e-com-net.com/image/info8/3b65a491438d4c34adc66ab16f860cb3.png" alt="HTML中不熟的知识点_第2张图片" width="603" height="185" style="border:1px solid black;"></a><br> 点击提交后,地址栏没有任何信息。<br> <br><br> <br><br> <code>post</code> 和 <code>get</code> 的几个问题:</p> <p><em>问题1:</em><br> 表单提交时 什么情况下属于get请求 什么情况下属于post请求?<br> Get请求 默认情况下 和 method为get请求<br> Post请求 method为post 时</p> <br> <p><em>问题2:</em><br> Get请求和post请求有什么区别? 面试题<br> 安全: post请求提交时路径上没有属性的信息 相对安全<br> Get 请求提交路径上存在属性的信息 不安全</p> <p>get请求在路径的地址上存在属性值 url的地址是有限制的<br> 最大为64kb</p> <br> <p><em>问题3</em><br> 什么时候使用get请求 什么时候使用post请求?<br> 要根据数据性质 — 热数据 安全度不重要的数据 使用get和post都可以</p> <p>如果数据的性质需要安全性比较高时 那么一定要使用post<br> 在写文件上传的功能时 请求必须是post的提交方式</p> <p><br></p> <p><br></p> <h6><code><input></code> 中 <code>type</code> 的属性 ( 列举比较常用的几个 )</h6> <table> <thead> <tr> <th>值</th> <th>作用</th> </tr> </thead> <tbody> <tr> <td><code>text</code></td> <td>定义单行的输入字段,用户可在其中输入文本。默认宽度为 20 个字符。</td> </tr> <tr> <td><code>password</code></td> <td>定义密码字段。该字段中的字符被掩码。</td> </tr> <tr> <td><code>checkbox</code></td> <td>定义复选框。</td> </tr> <tr> <td><code>button</code></td> <td>定义可点击按钮(多数情况下,用于通过 JavaScript 启动脚本)。</td> </tr> <tr> <td><code>file</code></td> <td>文件上传。</td> </tr> <tr> <td><code>radio</code></td> <td>定义单选按钮。</td> </tr> <tr> <td><code>reset</code></td> <td>定义重置按钮。重置按钮会清除表单中的所有数据。</td> </tr> <tr> <td><code>submit</code></td> <td>定义提交按钮。提交按钮会把表单数据发送到服务器。</td> </tr> </tbody> </table> <br> <p><code><input></code> 中 <code>name</code> 和 <code>id</code> 的区别:</p> <p>表单提交的数据都用控件的 <code>name</code> 而不是 <code>id</code> 来控制。因为有许多 <code>name</code> 会同时对应多个控件,比如<code>checkbox</code>和<code>radio</code>,而id必须是全文档中唯一的。此外浏览器会根据name来设定发送到服务器的request。因此如果用id,服务器是无法得到数据的。</p> <br> <p><code>value</code> 属性的含义就是把用户选中的数据传给后台,如果你不写 <code>value</code>,后台是得不到用户选的是什么。<br> 下面举个例子:</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 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">=</span><span class="token punctuation">"</span><span class="token punctuation">"</span></span> <span class="token attr-name">method</span><span class="token attr-value"><span class="token punctuation">=</span><span class="token punctuation">"</span>get<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">=</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">=</span><span class="token punctuation">"</span>color<span class="token punctuation">"</span></span> <span class="token attr-name">value</span><span class="token attr-value"><span class="token punctuation">=</span><span class="token punctuation">"</span>red<span class="token punctuation">"</span></span> <span class="token punctuation">/></span></span>red <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">=</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">=</span><span class="token punctuation">"</span>color<span class="token punctuation">"</span></span> <span class="token attr-name">value</span><span class="token attr-value"><span class="token punctuation">=</span><span class="token punctuation">"</span>blue<span class="token punctuation">"</span></span> <span class="token punctuation">/></span></span>blue <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">=</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">=</span><span class="token punctuation">"</span>color<span class="token punctuation">"</span></span> <span class="token attr-name">value</span><span class="token attr-value"><span class="token punctuation">=</span><span class="token punctuation">"</span>green<span class="token punctuation">"</span></span> <span class="token punctuation">/></span></span>green <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>div</span> <span class="token attr-name">class</span><span class="token attr-value"><span class="token punctuation">=</span><span class="token punctuation">"</span>sex<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">=</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">=</span><span class="token punctuation">"</span>sex<span class="token punctuation">"</span></span> <span class="token attr-name">value</span><span class="token attr-value"><span class="token punctuation">=</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">=</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">=</span><span class="token punctuation">"</span>sex<span class="token punctuation">"</span></span> <span class="token attr-name">value</span><span class="token attr-value"><span class="token punctuation">=</span><span class="token punctuation">"</span>female<span class="token punctuation">"</span></span> <span class="token punctuation">/></span></span>female <span class="token tag"><span class="token tag"><span class="token punctuation"></</span>div</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">=</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">=</span><span class="token punctuation">"</span>提交<span class="token punctuation">"</span></span> <span class="token punctuation">/></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"></</span>form</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>运行结果如下:<br> <a href="http://img.e-com-net.com/image/info8/a274ffa686234d298ee2c672429391b1.jpg" target="_blank"><img src="http://img.e-com-net.com/image/info8/a274ffa686234d298ee2c672429391b1.jpg" alt="HTML中不熟的知识点_第3张图片" width="650" height="154" style="border:1px solid black;"></a><br> 当我选了几个选项之后:</p> <p><a href="http://img.e-com-net.com/image/info8/1113f4cca6db40bcaeb3c3b71a1c2142.jpg" target="_blank"><img src="http://img.e-com-net.com/image/info8/1113f4cca6db40bcaeb3c3b71a1c2142.jpg" alt="HTML中不熟的知识点_第4张图片" width="650" height="172" style="border:1px solid black;"></a><br> 地址栏上的 <code>color</code> 和 <code>sex</code> 都有对应的数据,这就是 <code>value</code> 的作用。<br> <br><br> 假如我没有写value,选完选项之后,地址栏就是这样的:<br> <a href="http://img.e-com-net.com/image/info8/4b9bf2c220cc4ddabdd1dad4d6b8bd47.jpg" target="_blank"><img src="http://img.e-com-net.com/image/info8/4b9bf2c220cc4ddabdd1dad4d6b8bd47.jpg" alt="HTML中不熟的知识点_第5张图片" width="637" height="184" style="border:1px solid black;"></a><br> 意思就是你只是选中了这个<strong>单选框</strong>和<strong>复选框</strong>,没有实际的数据。</p> <br> <br> <h6><code><lable></code>标签的使用</h6> <p>这个标签可以让用户点击文字时,把焦点自动转到输入栏,例如:</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> 请输入:<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">=</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 tag"><span class="token tag"><span class="token punctuation"><</span>label</span> <span class="token attr-name">for</span><span class="token attr-value"><span class="token punctuation">=</span><span class="token punctuation">"</span>lab<span class="token punctuation">"</span></span><span class="token punctuation">></span></span>请输入:<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">=</span><span class="token punctuation">"</span>text<span class="token punctuation">"</span></span> <span class="token attr-name">id</span><span class="token attr-value"><span class="token punctuation">=</span><span class="token punctuation">"</span>lab<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>body</span><span class="token punctuation">></span></span> </code></pre> <p>如果点击第一行的 请输入: 鼠标不会转移到输入框内<br> 点击第二行的 请输入: 焦点就会移到输入框内</p> <p><em>使用时的注意事项!!</em><br> <code><lable></code> 中的 <code>for</code> 一定要和你所想要绑定元素 的 <code>id</code>一致</p> <p><br></p> <p><br></p> <h1>a标签</h1> <dl> <code><a></code> 标签是什么,有什么用? <dd> 定义超链接,用于从一张页面链接到另一张页面。 </dd> </dl> <p>列举几个比较常用的属性:</p> <table> <thead> <tr> <th>属性</th> <th>作用</th> </tr> </thead> <tbody> <tr> <td><code>href</code></td> <td>规定链接指向的页面的 URL。</td> </tr> <tr> <td><code>target</code></td> <td>规定在何处打开链接文档。</td> </tr> <tr> <td><code>name</code></td> <td>锚点,可以让 <code><a></code> 标签在页面内跳转。</td> </tr> </tbody> </table> <p><code>target</code> 有一个值:<code>_blank</code> 比较常用,是在新窗口打开目标页。<br> <br><br> 其实锚点可以直接用一个 <code><a></code> 来实现的,配合 <code>id</code> 。</p> <pre><code class="prism language-html"><span class="token doctype"><!DOCTYPE html></span> <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>html</span> <span class="token attr-name">lang</span><span class="token attr-value"><span class="token punctuation">=</span><span class="token punctuation">"</span>en<span class="token punctuation">"</span></span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>head</span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>meta</span> <span class="token attr-name">charset</span><span class="token attr-value"><span class="token punctuation">=</span><span class="token punctuation">"</span>UTF-8<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>meta</span> <span class="token attr-name">name</span><span class="token attr-value"><span class="token punctuation">=</span><span class="token punctuation">"</span>viewport<span class="token punctuation">"</span></span> <span class="token attr-name">content</span><span class="token attr-value"><span class="token punctuation">=</span><span class="token punctuation">"</span>width=device-width, initial-scale=1.0<span class="token punctuation">"</span></span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>title</span><span class="token punctuation">></span></span>Document<span class="token tag"><span class="token tag"><span class="token punctuation"></</span>title</span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>style</span><span class="token punctuation">></span></span><span class="token style language-css"> <span class="token selector">*</span><span class="token punctuation">{ </span> <span class="token property">margin</span><span class="token punctuation">:</span> 0<span class="token punctuation">;</span><span class="token property">padding</span><span class="token punctuation">:</span> 0<span class="token punctuation">;</span> <span class="token punctuation">}</span> <span class="token selector">a</span><span class="token punctuation">{ </span> <span class="token property">text-decoration</span><span class="token punctuation">:</span> none<span class="token punctuation">;</span> <span class="token punctuation">}</span> <span class="token selector">ul</span><span class="token punctuation">{ </span> <span class="token property">padding-top</span><span class="token punctuation">:</span> 10px<span class="token punctuation">;</span> <span class="token property">padding-bottom</span><span class="token punctuation">:</span> 10px<span class="token punctuation">;</span> <span class="token punctuation">}</span> <span class="token selector">li</span><span class="token punctuation">{ </span> <span class="token property">list-style</span><span class="token punctuation">:</span> none<span class="token punctuation">;</span> <span class="token property">text-align</span><span class="token punctuation">:</span> center<span class="token punctuation">;</span> <span class="token property">width</span><span class="token punctuation">:</span> 50px<span class="token punctuation">;</span> <span class="token property">margin</span><span class="token punctuation">:</span> 0px auto<span class="token punctuation">;</span> <span class="token punctuation">}</span> <span class="token selector">.daohang</span><span class="token punctuation">{ </span> <span class="token property">position</span><span class="token punctuation">:</span> fixed<span class="token punctuation">;</span><span class="token property">left</span><span class="token punctuation">:</span> 80%<span class="token punctuation">;</span><span class="token property">top</span><span class="token punctuation">:</span> 80%<span class="token punctuation">;</span> <span class="token property">width</span><span class="token punctuation">:</span> 100px<span class="token punctuation">;</span><span class="token property">height</span><span class="token punctuation">:</span> 83px<span class="token punctuation">;</span> <span class="token property">border-radius</span><span class="token punctuation">:</span> 15px<span class="token punctuation">;</span> <span class="token property">background-color</span><span class="token punctuation">:</span> aquamarine<span class="token punctuation">;</span> <span class="token punctuation">}</span> </span><span class="token tag"><span class="token tag"><span class="token punctuation"></</span>style</span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"></</span>head</span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>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 attr-name">id</span><span class="token attr-value"><span class="token punctuation">=</span><span class="token punctuation">"</span>main<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>h2</span> <span class="token attr-name">id</span><span class="token attr-value"><span class="token punctuation">=</span><span class="token punctuation">"</span>one<span class="token punctuation">"</span></span><span class="token punctuation">></span></span>第一<span class="token tag"><span class="token tag"><span class="token punctuation"></</span>h2</span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>p</span><span class="token punctuation">></span></span>阿吧阿巴巴巴阿吧阿巴巴巴<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>阿吧阿巴巴巴阿吧阿巴巴巴<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>阿吧阿巴巴巴阿吧阿巴巴巴<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>阿吧阿巴巴巴阿吧阿巴巴巴<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>阿吧阿巴巴巴阿吧阿巴巴巴<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>阿吧阿巴巴巴阿吧阿巴巴巴<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>阿吧阿巴巴巴阿吧阿巴巴巴<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>阿吧阿巴巴巴阿吧阿巴巴巴<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>阿吧阿巴巴巴阿吧阿巴巴巴<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>阿吧阿巴巴巴阿吧阿巴巴巴<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>阿吧阿巴巴巴阿吧阿巴巴巴<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>阿吧阿巴巴巴阿吧阿巴巴巴<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>阿吧阿巴巴巴阿吧阿巴巴巴<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>阿吧阿巴巴巴阿吧阿巴巴巴<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>h2</span> <span class="token attr-name">id</span><span class="token attr-value"><span class="token punctuation">=</span><span class="token punctuation">"</span>two<span class="token punctuation">"</span></span><span class="token punctuation">></span></span>第二<span class="token tag"><span class="token tag"><span class="token punctuation"></</span>h2</span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>p</span><span class="token punctuation">></span></span>阿吧阿巴巴巴阿吧阿巴巴巴<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>阿吧阿巴巴巴阿吧阿巴巴巴<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>阿吧阿巴巴巴阿吧阿巴巴巴<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>阿吧阿巴巴巴阿吧阿巴巴巴<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>阿吧阿巴巴巴阿吧阿巴巴巴<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>阿吧阿巴巴巴阿吧阿巴巴巴<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>阿吧阿巴巴巴阿吧阿巴巴巴<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>阿吧阿巴巴巴阿吧阿巴巴巴<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>阿吧阿巴巴巴阿吧阿巴巴巴<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>阿吧阿巴巴巴阿吧阿巴巴巴<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>阿吧阿巴巴巴阿吧阿巴巴巴<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>阿吧阿巴巴巴阿吧阿巴巴巴<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>阿吧阿巴巴巴阿吧阿巴巴巴<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>阿吧阿巴巴巴阿吧阿巴巴巴<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>h2</span> <span class="token attr-name">id</span><span class="token attr-value"><span class="token punctuation">=</span><span class="token punctuation">"</span>three<span class="token punctuation">"</span></span><span class="token punctuation">></span></span>第三<span class="token tag"><span class="token tag"><span class="token punctuation"></</span>h2</span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>p</span><span class="token punctuation">></span></span>阿吧阿巴巴巴阿吧阿巴巴巴<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>阿吧阿巴巴巴阿吧阿巴巴巴<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>阿吧阿巴巴巴阿吧阿巴巴巴<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>阿吧阿巴巴巴阿吧阿巴巴巴<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>阿吧阿巴巴巴阿吧阿巴巴巴<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>阿吧阿巴巴巴阿吧阿巴巴巴<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>阿吧阿巴巴巴阿吧阿巴巴巴<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>阿吧阿巴巴巴阿吧阿巴巴巴<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>阿吧阿巴巴巴阿吧阿巴巴巴<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>阿吧阿巴巴巴阿吧阿巴巴巴<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>阿吧阿巴巴巴阿吧阿巴巴巴<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>阿吧阿巴巴巴阿吧阿巴巴巴<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>阿吧阿巴巴巴阿吧阿巴巴巴<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>阿吧阿巴巴巴阿吧阿巴巴巴<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 attr-name">class</span><span class="token attr-value"><span class="token punctuation">=</span><span class="token punctuation">"</span>daohang<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>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>a</span> <span class="token attr-name">href</span><span class="token attr-value"><span class="token punctuation">=</span><span class="token punctuation">"</span>#one<span class="token punctuation">"</span></span><span class="token punctuation">></span></span>第一<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>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>a</span> <span class="token attr-name">href</span><span class="token attr-value"><span class="token punctuation">=</span><span class="token punctuation">"</span>#two<span class="token punctuation">"</span></span><span class="token punctuation">></span></span>第二<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>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>a</span> <span class="token attr-name">href</span><span class="token attr-value"><span class="token punctuation">=</span><span class="token punctuation">"</span>#three<span class="token punctuation">"</span></span><span class="token punctuation">></span></span>第三<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>li</span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"></</span>ul</span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"></</span>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>body</span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"></</span>html</span><span class="token punctuation">></span></span> </code></pre> <p>就是:<code><a href="# 加上 想要转到的内容的id"> 内容 </a></code></p> <br> <br> <h1>img标签中的usemap</h1> <p>举个例子:</p> <pre><code class="prism language-html"><span class="token doctype"><!DOCTYPE html></span> <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>html</span> <span class="token attr-name">lang</span><span class="token attr-value"><span class="token punctuation">=</span><span class="token punctuation">"</span>en<span class="token punctuation">"</span></span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>head</span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>meta</span> <span class="token attr-name">charset</span><span class="token attr-value"><span class="token punctuation">=</span><span class="token punctuation">"</span>UTF-8<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>meta</span> <span class="token attr-name">http-equiv</span><span class="token attr-value"><span class="token punctuation">=</span><span class="token punctuation">"</span>X-UA-Compatible<span class="token punctuation">"</span></span> <span class="token attr-name">content</span><span class="token attr-value"><span class="token punctuation">=</span><span class="token punctuation">"</span>IE=edge<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>meta</span> <span class="token attr-name">name</span><span class="token attr-value"><span class="token punctuation">=</span><span class="token punctuation">"</span>viewport<span class="token punctuation">"</span></span> <span class="token attr-name">content</span><span class="token attr-value"><span class="token punctuation">=</span><span class="token punctuation">"</span>width=device-width, initial-scale=1.0<span class="token punctuation">"</span></span> <span class="token punctuation">/></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>title</span><span class="token punctuation">></span></span>Document<span class="token tag"><span class="token tag"><span class="token punctuation"></</span>title</span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"></</span>head</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> <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">=</span><span class="token punctuation">"</span>./image/1.jpeg<span class="token punctuation">"</span></span> <span class="token attr-name">alt</span><span class="token attr-value"><span class="token punctuation">=</span><span class="token punctuation">"</span><span class="token punctuation">"</span></span> <span class="token attr-name">usemap</span><span class="token attr-value"><span class="token punctuation">=</span><span class="token punctuation">"</span>#fff<span class="token punctuation">"</span></span> <span class="token punctuation">/></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>map</span> <span class="token attr-name">name</span><span class="token attr-value"><span class="token punctuation">=</span><span class="token punctuation">"</span>fff<span class="token punctuation">"</span></span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>area</span> <span class="token attr-name">shape</span><span class="token attr-value"><span class="token punctuation">=</span><span class="token punctuation">"</span>rect<span class="token punctuation">"</span></span> <span class="token attr-name">coords</span><span class="token attr-value"><span class="token punctuation">=</span><span class="token punctuation">"</span>215,27,434,120<span class="token punctuation">"</span></span> <span class="token attr-name">href</span><span class="token attr-value"><span class="token punctuation">=</span><span class="token punctuation">"</span>https://store.99box.com/preferential/smzh17bzb?channel=360gh01&plan=A100-sj-smzh17&unit=smzh17&kw=%E4%BD%BF%E5%91%BD%E5%8F%AC%E5%94%A417<span class="token punctuation">"</span></span> <span class="token attr-name">alt</span><span class="token attr-value"><span class="token punctuation">=</span><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>map</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> <span class="token tag"><span class="token tag"><span class="token punctuation"></</span>html</span><span class="token punctuation">></span></span> </code></pre> <p><code><area></code> 里的几个属性:</p> <dl> <code>shape</code> <dd> <code>rect</code>-----矩形 </dd> <dd> <code>circ</code>-----圆形 </dd> <dd> <code>poly</code>-----多边形 </dd> <code>coords</code> <dd> 矩形 ----- 记录矩形左上角和右下角的两点坐标( x轴,y轴,x轴,y轴 ) </dd> <dd> 圆形 ----- 记录圆心坐标和半径 </dd> <dd> 多边形 ----- 记录每个端点的坐标 </dd> </dl> <h1>语义化标签</h1> <dl> 什么是语义化标签 <dd> 语义化标签就是尽量使用有相对应的结构的含义的 HTML 的标签(就相当于代替了一些div标签) </dd> <dd> 代码结构清晰,方便阅读,有利于团队合作开发。 </dd> <dd> 方便其他设备解析(如屏幕阅读器、盲人阅读器、移动设备)以语义的方式来渲染网页。 </dd> <dd> 有利于搜索引擎优化(SEO)。 </dd> </dl> <h5>以下几个比较常用</h5> <table> <thead> <tr> <th>标签</th> <th>描述</th> </tr> </thead> <tbody> <tr> <td><code><header></code></td> <td>规定文档或节的页眉。</td> </tr> <tr> <td><code><nav></code></td> <td>定义导航链接。</td> </tr> <tr> <td><code><main></code></td> <td>规定文档的主内容。</td> </tr> <tr> <td><code><aside></code></td> <td>定义页面内容以外的内容。</td> </tr> <tr> <td><code><article></code></td> <td>定义文章。</td> </tr> <tr> <td><code><section></code></td> <td>定义文档中的节。</td> </tr> <tr> <td><code><footer></code></td> <td>定义文档或节的页脚。</td> </tr> <tr> <td><code><figure></code></td> <td>规定自包含内容,比如图示、图表、照片、代码清单等。</td> </tr> <tr> <td><code><figcaption></code></td> <td>定义 <code><figure></code> 元素的标题。</td> </tr> <tr> <td><code><hgroup></code></td> <td>标题组合。</td> </tr> </tbody> </table> <h1>其他</h1> <p><strong>结构层</strong>:html5—XHTML HTML4.0版本 超文本标记语言</p> <p><strong>表现层</strong>:css3.0 -css2.0版本 层叠样式表</p> <p><strong>行为层</strong>:javascript 脚本语言 用于定义整个网站的行为</p> <p><strong>W3C</strong> -----万维网联盟定义一系列的标准 ----Web标准</p> <p>符合HTTP协议 面向连接 符合Web通信的标准</p> <p>我们所有的web项目都要尊崇W3C所提供的标准和HTTP协议。</p> <p><strong>HTML 英文全称</strong>:<mark>Hyper Text Markup Language</mark></p> <h5>HTML 与 XML的区别:</h5> <dl> HTML <dd> 超文本标记语言—展示数据 </dd> <dd> 有固定的标签,例如:html,body,title等等… </dd> XML <dd> 可扩展标记语言 ----存储数据 配置文件 </dd> <dd> 没有固定的标签。 </dd> </dl> <p><strong>标签</strong>—<mark>Tag</mark></p> </div> </div> </div> </div> </div> <!--PC和WAP自适应版--> <div id="SOHUCS" sid="1386956460595957760"></div> <script type="text/javascript" src="/views/front/js/chanyan.js"></script> <!-- 文章页-底部 动态广告位 --> <div class="youdao-fixed-ad" id="detail_ad_bottom"></div> </div> <div class="col-md-3"> <div class="row" id="ad"> <!-- 文章页-右侧1 动态广告位 --> <div id="right-1" class="col-lg-12 col-md-12 col-sm-4 col-xs-4 ad"> <div class="youdao-fixed-ad" id="detail_ad_1"> </div> </div> <!-- 文章页-右侧2 动态广告位 --> <div id="right-2" class="col-lg-12 col-md-12 col-sm-4 col-xs-4 ad"> <div class="youdao-fixed-ad" id="detail_ad_2"></div> </div> <!-- 文章页-右侧3 动态广告位 --> <div id="right-3" class="col-lg-12 col-md-12 col-sm-4 col-xs-4 ad"> <div class="youdao-fixed-ad" id="detail_ad_3"></div> </div> </div> </div> </div> </div> </div> <div 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