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CSS的基本使用--笔记回顾

程序员文章站 2022-03-07 18:41:37
CSS的基本使用--笔记回顾1、CSS的引入_内联样式2、CSS引入文档样式表3、CSS外部样式表4、CSS选择器_通用选择器5、CSS选择器_元素选规器6、CSS选择器_类选择器7、CSS选择器_id选择器8、开发中结构和样式分离9、最常见的CSS属性10、颜色的设置方式1、CSS的引入_内联样式 ...</div> <div class="content"> <p> </p> <div class="toc"> <h3>CSS的基本使用--笔记回顾</h3> <ul> <li><a href="#1CSS__6">1、CSS的引入_内联样式</a></li> <li><a href="#2CSS_26">2、CSS引入文档样式表</a></li> <li><a href="#3CSS_68">3、CSS外部样式表</a></li> <li><a href="#4CSS__95">4、CSS选择器_通用选择器</a></li> <li><a href="#5CSS__129">5、CSS选择器_元素选规器</a></li> <li><a href="#6CSS__159">6、CSS选择器_类选择器</a></li> <li><a href="#7CSS_id_209">7、CSS选择器_id选择器</a></li> <li><a href="#8_243">8、开发中结构和样式分离</a></li> <li><a href="#9CSS_264">9、最常见的CSS属性</a></li> <li><a href="#10_326">10、颜色的设置方式</a></li> </ul> </div> <p> </p> <hr color="#000000" size='1"'> <h1> <a id="1CSS__6" target="_blank" rel="nofollow" href="/default/index/url?u=aHR0cHM6Ly93d3cuMTBxaWFud2FuLmNvbQ=="></a>1、CSS的引入_内联样式</h1> <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>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 comment"><!-- 1.内联样式:Inline --></span> <span class="token comment"><!-- <h1 style="属性名:属性值;属性名:属性值">网页的标题</h1> --></span> <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>h1</span><span class="token style-attr language-css"><span class="token attr-name"> <span class="token attr-name">style</span></span><span class="token punctuation">="</span><span class="token attr-value"><span class="token property">font-size</span><span class="token punctuation">:</span> 50px<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 class="token punctuation">></span></span>网页的标题<span class="token tag"><span class="token tag"><span class="token punctuation"></</span>h1</span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>p</span><span class="token punctuation">></span></span>网页的段落<span class="token tag"><span class="token tag"><span class="token punctuation"></</span>p</span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>a</span> <span class="token attr-name">href</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>百度一下<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>div</span><span class="token style-attr language-css"><span class="token attr-name"> <span class="token attr-name">style</span></span><span class="token punctuation">="</span><span class="token attr-value"><span class="token property">font-size</span><span class="token punctuation">:</span> 20px<span class="token punctuation">;</span><span class="token property">background-color</span><span class="token punctuation">:</span> red<span class="token punctuation">;</span></span><span class="token punctuation">"</span></span><span class="token punctuation">></span></span>哈哈哈<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> <h1> <a id="2CSS_26" target="_blank" rel="nofollow" href="/default/index/url?u=aHR0cHM6Ly93d3cuMTBxaWFud2FuLmNvbQ=="></a>2、CSS引入文档样式表</h1> <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>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 comment">/* 快捷键:ctrl+/ 选择器{ 属性名:属性值 } */</span> <span class="token comment">/* 单个元素选择器 */</span> <span class="token selector">h1</span><span class="token punctuation">{</span> <span class="token property">font-size</span><span class="token punctuation">:</span> 50px<span class="token punctuation">;</span> <span class="token property">color</span><span class="token punctuation">:</span> red<span class="token punctuation">;</span> <span class="token punctuation">}</span> <span class="token selector">div</span><span class="token punctuation">{</span> <span class="token property">font-size</span><span class="token punctuation">:</span> 20px<span class="token punctuation">;</span> <span class="token property">background-color</span><span class="token punctuation">:</span> red<span class="token punctuation">;</span> <span class="token punctuation">}</span> <span class="token comment">/* 类选择器 */</span> <span class="token selector">.red</span><span class="token punctuation">{</span> <span class="token property">color</span><span class="token punctuation">:</span> red<span class="token punctuation">;</span> <span class="token punctuation">}</span> <span class="token comment">/* 并集选择器 */</span> <span class="token comment">/* h1,p,a{ color: red; } */</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 comment"><!-- 文档样式表:document style sheet --></span> <span class="token comment"><!-- 开发网页特性:结构和样式分离 --></span> <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>h1</span><span class="token punctuation">></span></span>网页的标题<span class="token tag"><span class="token tag"><span class="token punctuation"></</span>h1</span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>p</span> <span class="token attr-name">class</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>段落内容<span class="token tag"><span class="token tag"><span class="token punctuation"></</span>p</span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>a</span> <span class="token attr-name">class</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 attr-name">href</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>百度一下<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>div</span><span class="token punctuation">></span></span>呵呵呵<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> <h1> <a id="3CSS_68" target="_blank" rel="nofollow" href="/default/index/url?u=aHR0cHM6Ly93d3cuMTBxaWFud2FuLmNvbQ=="></a>3、CSS外部样式表</h1> <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>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 comment"><!-- 1.link引入样式:rel="stylesheet" --></span> <span class="token comment"><!-- 不太重要的放上面,因为下面的会覆盖上面的 --></span> <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>link</span> <span class="token attr-name">rel</span><span class="token attr-value"><span class="token punctuation">=</span><span class="token punctuation">"</span>stylesheet<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>./css/base.css<span class="token punctuation">"</span></span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>link</span> <span class="token attr-name">rel</span><span class="token attr-value"><span class="token punctuation">=</span><span class="token punctuation">"</span>stylesheet<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>./css/style.css<span class="token punctuation">"</span></span><span class="token punctuation">></span></span> <span class="token comment"><!-- 2.style -> @import --></span> <span class="token comment"><!-- 不建议使用import引入css文件 --></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 atrule"><span class="token rule">@import</span> <span class="token url">url(./css/base.css)</span><span class="token punctuation">;</span></span> <span class="token atrule"><span class="token rule">@import</span> <span class="token url">url(./css/style.css)</span><span class="token punctuation">;</span></span> </span><span class="token tag"><span class="token tag"><span class="token punctuation"></</span>style</span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"></</span>head</span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>body</span><span class="token punctuation">></span></span> <span class="token comment"><!-- 外部样式表:external style sheet --></span> <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>h1</span><span class="token punctuation">></span></span>网页标题<span class="token tag"><span class="token tag"><span class="token punctuation"></</span>h1</span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>p</span><span class="token punctuation">></span></span>段落内容<span class="token tag"><span class="token tag"><span class="token punctuation"></</span>p</span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>a</span> <span class="token attr-name">href</span><span class="token attr-value"><span class="token punctuation">=</span><span class="token punctuation">"</span>#<span class="token punctuation">"</span></span><span class="token punctuation">></span></span>百度一下<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>div</span><span class="token punctuation">></span></span>呵呵呵<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> <h1> <a id="4CSS__95" target="_blank" rel="nofollow" href="/default/index/url?u=aHR0cHM6Ly93d3cuMTBxaWFud2FuLmNvbQ=="></a>4、CSS选择器_通用选择器</h1> <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>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 comment">/* 通配选择器 */</span> <span class="token comment">/* 尽量不用,影响效率 */</span> <span class="token comment">/* *{ color: red; background-color: red; } */</span> <span class="token selector">div,p,span,strong</span><span class="token punctuation">{</span> <span class="token property">background-color</span><span class="token punctuation">:</span> red<span class="token punctuation">;</span> <span class="token punctuation">}</span> <span class="token selector">*</span><span class="token punctuation">{</span> <span class="token property">background-color</span><span class="token punctuation">:</span> white<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><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 punctuation">></span></span>div<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>p<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>span</span><span class="token punctuation">></span></span>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>strong</span><span class="token punctuation">></span></span>strong<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>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><img onerror="this.src='/statics/superweb999/images/image_error.jpg'"src="/default/index/img?u=aHR0cDovL2ltYWdlczUuMTBxaWFud2FuLmNvbS8xMHFpYW53YW4vMjAyMDEwMjYvYl8wXzIwMjAxMDI2MTAwOTMyMzU1OC5wbmc=" alt="CSS的基本使用--笔记回顾" title="CSS的基本使用--笔记回顾"></p> <h1> <a id="5CSS__129" target="_blank" rel="nofollow" href="/default/index/url?u=aHR0cHM6Ly93d3cuMTBxaWFud2FuLmNvbQ=="></a>5、CSS选择器_元素选规器</h1> <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>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>style</span><span class="token punctuation">></span></span><span class="token style language-css"> <span class="token selector">div</span><span class="token punctuation">{</span> <span class="token property">color</span><span class="token punctuation">:</span> pink<span class="token punctuation">;</span> <span class="token punctuation">}</span> <span class="token selector">p</span><span class="token punctuation">{</span> <span class="token property">color</span><span class="token punctuation">:</span>yellow<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">color</span><span class="token punctuation">:</span> green<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>body</span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>div</span><span class="token punctuation">></span></span>div1<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>p<span class="token tag"><span class="token tag"><span class="token punctuation"></</span>p</span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>a</span> <span class="token attr-name">href</span><span class="token attr-value"><span class="token punctuation">=</span><span class="token punctuation">"</span>#<span class="token punctuation">"</span></span><span class="token punctuation">></span></span>a<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>div</span><span class="token punctuation">></span></span>div2<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>div3<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><img onerror="this.src='/statics/superweb999/images/image_error.jpg'"src="/default/index/img?u=aHR0cDovL2ltYWdlczUuMTBxaWFud2FuLmNvbS8xMHFpYW53YW4vMjAyMDEwMjYvYl8wXzIwMjAxMDI2MTAwOTMzMTI0Mi5qcGc=" alt="CSS的基本使用--笔记回顾" title="CSS的基本使用--笔记回顾"></p> <h1> <a id="6CSS__159" target="_blank" rel="nofollow" href="/default/index/url?u=aHR0cHM6Ly93d3cuMTBxaWFud2FuLmNvbQ=="></a>6、CSS选择器_类选择器</h1> <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>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>style</span><span class="token punctuation">></span></span><span class="token style language-css"> <span class="token selector">.box1</span><span class="token punctuation">{</span> <span class="token property">color</span><span class="token punctuation">:</span> pink<span class="token punctuation">;</span> <span class="token punctuation">}</span> <span class="token selector">.box2</span><span class="token punctuation">{</span> <span class="token property">color</span><span class="token punctuation">:</span> green<span class="token punctuation">;</span> <span class="token punctuation">}</span> <span class="token selector">.box3</span><span class="token punctuation">{</span> <span class="token property">color</span><span class="token punctuation">:</span> purple<span class="token punctuation">;</span> <span class="token punctuation">}</span> <span class="token selector">.large-font</span><span class="token punctuation">{</span> <span class="token property">font-size</span><span class="token punctuation">:</span> 25px<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>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">class</span><span class="token attr-value"><span class="token punctuation">=</span><span class="token punctuation">"</span>box1<span class="token punctuation">"</span></span><span class="token punctuation">></span></span>div1<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 attr-name">class</span><span class="token attr-value"><span class="token punctuation">=</span><span class="token punctuation">"</span>large-font<span class="token punctuation">"</span></span><span class="token punctuation">></span></span>p1<span class="token tag"><span class="token tag"><span class="token punctuation"></</span>p</span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>a</span> <span class="token attr-name">href</span><span class="token attr-value"><span class="token punctuation">=</span><span class="token punctuation">"</span>#<span class="token punctuation">"</span></span><span class="token punctuation">></span></span>a<span class="token tag"><span class="token tag"><span class="token punctuation"></</span>a</span><span class="token punctuation">></span></span> <span class="token comment"><!-- 强调:一个元素是可以有多个类的,多个类以空格进行分割 --></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>box2 large-font<span class="token punctuation">"</span></span><span class="token punctuation">></span></span>div2<span class="token tag"><span class="token tag"><span class="token punctuation"></</span>div</span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>div</span> <span class="token attr-name">class</span><span class="token attr-value"><span class="token punctuation">=</span><span class="token punctuation">"</span>box3<span class="token punctuation">"</span></span><span class="token punctuation">></span></span>div3<span class="token tag"><span class="token tag"><span class="token punctuation"></</span>div</span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>div</span> <span class="token attr-name">class</span><span class="token attr-value"><span class="token punctuation">=</span><span class="token punctuation">"</span>box2<span class="token punctuation">"</span></span><span class="token punctuation">></span></span>div4<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>p2<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"><!-- 类的名字的规范 1.尽量见名知意 2.当多个单词时,以什么样方式连接 - 连接:中划线(连字符) large-font _ 连接:下划线 large_font 驼峰连接 laegeFont --></span> <span class="token comment"><!-- 驼峰标识 小驼峰:第一个单词第一个字母小写,后面遇到单词首字母就大写 html->class js函数名 大驼峰:所有单词首字母都大写 js中定义类的名字 --></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><img onerror="this.src='/statics/superweb999/images/image_error.jpg'"src="/default/index/img?u=aHR0cDovL2ltYWdlczUuMTBxaWFud2FuLmNvbS8xMHFpYW53YW4vMjAyMDEwMjYvYl8wXzIwMjAxMDI2MTAwOTMzMTE4Mi5qcGc=" alt="CSS的基本使用--笔记回顾" title="CSS的基本使用--笔记回顾"></p> <h1> <a id="7CSS_id_209" target="_blank" rel="nofollow" href="/default/index/url?u=aHR0cHM6Ly93d3cuMTBxaWFud2FuLmNvbQ=="></a>7、CSS选择器_id选择器</h1> <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>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">#header</span><span class="token punctuation">{</span> <span class="token property">color</span><span class="token punctuation">:</span> red<span class="token punctuation">;</span> <span class="token punctuation">}</span> <span class="token selector">#content</span><span class="token punctuation">{</span> <span class="token property">color</span><span class="token punctuation">:</span> blue<span class="token punctuation">;</span> <span class="token punctuation">}</span> <span class="token selector">#product</span><span class="token punctuation">{</span> <span class="token property">color</span><span class="token punctuation">:</span> yellow <span class="token punctuation">;</span> <span class="token punctuation">}</span> <span class="token selector">#footer</span><span class="token punctuation">{</span> <span class="token property">color</span><span class="token punctuation">:</span> brown<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 comment"><!-- id用大门类划分 --></span> <span class="token comment"><!-- 强调:id不要重复 --></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>header<span class="token punctuation">"</span></span><span class="token punctuation">></span></span>头部<span class="token tag"><span class="token tag"><span class="token punctuation"></</span>div</span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>div</span> <span class="token attr-name">id</span><span class="token attr-value"><span class="token punctuation">=</span><span class="token punctuation">"</span>contene<span class="token punctuation">"</span></span><span class="token punctuation">></span></span>内容<span class="token tag"><span class="token tag"><span class="token punctuation"></</span>div</span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>div</span> <span class="token attr-name">id</span><span class="token attr-value"><span class="token punctuation">=</span><span class="token punctuation">"</span>product<span class="token punctuation">"</span></span><span class="token punctuation">></span></span>商品<span class="token tag"><span class="token tag"><span class="token punctuation"></</span>div</span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>div</span> <span class="token attr-name">id</span><span class="token attr-value"><span class="token punctuation">=</span><span class="token punctuation">"</span>footer<span class="token punctuation">"</span></span><span class="token punctuation">></span></span><span class="token tag"><span class="token tag"><span class="token punctuation"></</span>div</span><span class="token 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><img onerror="this.src='/statics/superweb999/images/image_error.jpg'"src="/default/index/img?u=aHR0cDovL2ltYWdlczUuMTBxaWFud2FuLmNvbS8xMHFpYW53YW4vMjAyMDEwMjYvYl8wXzIwMjAxMDI2MTAwOTM0Nzg5NC5qcGc=" alt="CSS的基本使用--笔记回顾" title="CSS的基本使用--笔记回顾"></p> <h1> <a id="8_243" target="_blank" rel="nofollow" href="/default/index/url?u=aHR0cHM6Ly93d3cuMTBxaWFud2FuLmNvbQ=="></a>8、开发中结构和样式分离</h1> <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>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">.product-item</span><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 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 comment"><!-- 注意:网页图标支持的图片格式是ico、png --></span> <span class="token comment"><!-- 16*16 24*24 32*32 --></span> <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>img</span> <span class="token attr-name">class</span><span class="token attr-value"><span class="token punctuation">=</span><span class="token punctuation">"</span>product-item<span class="token punctuation">"</span></span> <span class="token attr-name">src</span><span class="token attr-value"><span class="token punctuation">=</span><span class="token punctuation">"</span>../img/test.webp<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>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> <h1> <a id="9CSS_264" target="_blank" rel="nofollow" href="/default/index/url?u=aHR0cHM6Ly93d3cuMTBxaWFud2FuLmNvbQ=="></a>9、最常见的CSS属性</h1> <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>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 comment">/* 1.color:前景色 */</span> <span class="token selector">.box1</span><span class="token punctuation">{</span> <span class="token property">color</span><span class="token punctuation">:</span> green<span class="token punctuation">;</span> <span class="token property">text-decoration</span><span class="token punctuation">:</span>underlin <span class="token punctuation">;</span> <span class="token comment">/* border: 5px soild; */</span> <span class="token property">border-width</span><span class="token punctuation">:</span> 10px<span class="token punctuation">;</span> <span class="token property">border-style</span><span class="token punctuation">:</span> solid<span class="token punctuation">;</span> <span class="token punctuation">}</span> <span class="token comment">/* 2.font-size:文字的大小 */</span> <span class="token selector">.box2</span><span class="token punctuation">{</span> <span class="token property">font-size</span><span class="token punctuation">:</span> 30px<span class="token punctuation">;</span> <span class="token punctuation">}</span> <span class="token comment">/* 3.background-color:背景颜色 */</span> <span class="token selector">.box3</span><span class="token punctuation">{</span> <span class="token property">background-color</span><span class="token punctuation">:</span> greenyellow<span class="token punctuation">;</span> <span class="token punctuation">}</span> <span class="token selector">.tiltle3</span><span class="token punctuation">{</span> <span class="token property">background-color</span><span class="token punctuation">:</span> skyblue<span class="token punctuation">;</span> <span class="token punctuation">}</span> <span class="token comment">/* 4.width/height:宽度和高度 */</span> <span class="token selector">.box4</span><span class="token punctuation">{</span> <span class="token property">background-color</span><span class="token punctuation">:</span> orange<span class="token punctuation">;</span> <span class="token property">width</span><span class="token punctuation">:</span> 300px<span class="token punctuation">;</span> <span class="token property">height</span><span class="token punctuation">:</span> 300px<span class="token punctuation">;</span> <span class="token punctuation">}</span> <span class="token selector">.title4</span><span class="token punctuation">{</span> <span class="token property">background-color</span><span class="token punctuation">:</span> purple<span class="token punctuation">;</span> <span class="token comment">/* 无效的:宽度和高度不适用于非替换行内元素 */</span> <span class="token property">width</span><span class="token punctuation">:</span> 300px<span class="token punctuation">;</span> <span class="token property">height</span><span class="token punctuation">:</span> 300px<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 comment"><!-- 1.color:前景色 --></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>box1<span class="token punctuation">"</span></span><span class="token punctuation">></span></span>hahahahaha<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"><!-- 2.font-size:文字的大小 --></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>box2<span class="token punctuation">"</span></span><span class="token punctuation">></span></span>hehehhehehehe<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"><!-- 3.background-color:背景颜色 --></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>box3<span class="token punctuation">"</span></span><span class="token punctuation">></span></span>hihiiihihihihi<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 attr-name">class</span><span class="token attr-value"><span class="token punctuation">=</span><span class="token punctuation">"</span>title3<span class="token punctuation">"</span></span><span class="token punctuation">></span></span>hehiehiehiehiehei<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 attr-name">class</span><span class="token attr-value"><span class="token punctuation">=</span><span class="token punctuation">"</span>title<span class="token punctuation">"</span></span><span class="token punctuation">></span></span>aaaa<span class="token tag"><span class="token tag"><span class="token punctuation"></</span>span</span><span class="token punctuation">></span></span> <span class="token comment"><!-- 4.width/height:宽度和高度 --></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>box4<span class="token punctuation">"</span></span><span class="token punctuation">></span></span>xiixixixixiix<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 attr-name">class</span><span class="token attr-value"><span class="token punctuation">=</span><span class="token punctuation">"</span>title4<span class="token punctuation">"</span></span><span class="token punctuation">></span></span>bbbb<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> <span class="token tag"><span class="token tag"><span class="token punctuation"></</span>html</span><span class="token punctuation">></span></span> </code></pre> <p><img onerror="this.src='/statics/superweb999/images/image_error.jpg'"src="/default/index/img?u=aHR0cDovL2ltYWdlczUuMTBxaWFud2FuLmNvbS8xMHFpYW53YW4vMjAyMDEwMjYvYl8wXzIwMjAxMDI2MTAwOTM0MzM1MC5qcGc=" alt="CSS的基本使用--笔记回顾" title="CSS的基本使用--笔记回顾"></p> <h1> <a id="10_326" target="_blank" rel="nofollow" href="/default/index/url?u=aHR0cHM6Ly93d3cuMTBxaWFud2FuLmNvbQ=="></a>10、颜色的设置方式</h1> <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>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">div</span><span class="token punctuation">{</span> <span class="token property">width</span><span class="token punctuation">:</span> 200px<span class="token punctuation">;</span> <span class="token property">height</span><span class="token punctuation">:</span> 200px<span class="token punctuation">;</span> <span class="token comment">/* background-color: rgb(0,0,0); */</span> <span class="token comment">/* alpha:0~1 */</span> <span class="token property">background-color</span><span class="token punctuation">:</span> <span class="token function">rgba</span><span class="token punctuation">(</span>0,255,0,0.5<span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">/* 转成十六进制 */</span> <span class="token comment">/* background-color: #00ff00; */</span> <span class="token comment">/* background-color: transparent;等价于rgba(0,0,0,0) ,完全透明*/</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 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>本文地址:https://blog.csdn.net/qq_47000934/article/details/109273745</p> </div> <div class="tags"> 相关标签: <a 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