容易学：网页设计9-网页美化CSS 选取器
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">回顾之前css<span style="color: black;">基本</span><a style="color: black;"><span style="color: black;">容易</span>学：网页设计8-网页美化CSS<span style="color: black;">基本</span></a></p>
<div style="color: black; text-align: left; margin-bottom: 10px;"><img src="https://pic1.zhimg.com/80/v2-b1e36ea34735a2facd652e1f160b2ee4_720w.webp" style="width: 50%; margin-bottom: 20px;"></div>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">分组<span style="color: black;">选取</span>器<span style="color: black;">亦</span>叫并集<span style="color: black;">选取</span>器，是各个<span style="color: black;">选取</span>器<span style="color: black;">经过</span>逗号连接而成的：</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"> h2,h3,p{color:red; font-size:14px;} /*<span style="color: black;">区别</span>标记<span style="color: black;">构成</span>的并集<span style="color: black;">选取</span>器*/</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">h3,.special,#one{text-decoration:underline;} /*标记、类、id<span style="color: black;">构成</span>的的并集<span style="color: black;">选取</span>器*/</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">1.属性<span style="color: black;">选取</span>器</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">属性<span style="color: black;">选取</span>器<span style="color: black;">能够</span><span style="color: black;">按照</span>网页标签的属性及属性值来<span style="color: black;">选取</span>标签。属性<span style="color: black;">选取</span>器<span style="color: black;">通常</span>是一个标签后紧跟中括号“[]”，中括号内部是属性<span style="color: black;">或</span>属性表达式</p>
<div style="color: black; text-align: left; margin-bottom: 10px;"><img src="https://pic4.zhimg.com/80/v2-d0bca8c6c0ba6cdf7d61c5969044b867_720w.webp" style="width: 50%; margin-bottom: 20px;"></div>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">属性<span style="color: black;">选取</span>器<span style="color: black;">指的是</span><span style="color: black;">选取</span>名<span style="color: black;">叫作</span>为E的标记，且该标记定义了att属性，att属性值<span style="color: black;">包括</span>value的子字符串。<span style="color: black;">必须</span><span style="color: black;">重视</span>的是E是<span style="color: black;">能够</span>省略的，<span style="color: black;">倘若</span>省略则<span style="color: black;">暗示</span><span style="color: black;">能够</span>匹配满足<span style="color: black;">要求</span>的任意元素。</p>
<div style="color: black; text-align: left; margin-bottom: 10px;"><img src="https://pic2.zhimg.com/80/v2-a20d7d812336447112e126915d551fc5_720w.webp" style="width: 50%; margin-bottom: 20px;"></div>
<div style="color: black; text-align: left; margin-bottom: 10px;"><span style="color: black;"><</span><span style="color: black;">style</span> <span style="color: black;">type</span><span style="color: black;">=</span><span style="color: black;">"text/css"</span><span style="color: black;">></span>
<span style="color: black;">p</span><span style="color: black;">[</span><span style="color: black;">id</span><span style="color: black;">^=</span><span style="color: black;">one</span><span style="color: black;">]</span><span style="color: black;">{</span>
<span style="color: black;">color</span><span style="color: black;">:</span><span style="color: black;">pink</span><span style="color: black;">;</span>
<span style="color: black;">font-family</span><span style="color: black;">:</span> <span style="color: black;">"微软雅黑"</span><span style="color: black;">;</span>
<span style="color: black;">font-size</span><span style="color: black;">:</span> <span style="color: black;">20</span><span style="color: black;">px</span><span style="color: black;">;</span>
<span style="color: black;">}</span>
<span style="color: black;"></</span><span style="color: black;">style</span><span style="color: black;">></span>
</div>
<div style="color: black; text-align: left; margin-bottom: 10px;"><span style="color: black;"><</span><span style="color: black;">style</span> <span style="color: black;">type</span><span style="color: black;">=</span><span style="color: black;">"text/css"</span><span style="color: black;">></span>
<span style="color: black;">p</span><span style="color: black;">[</span><span style="color: black;">id</span><span style="color: black;">$=</span><span style="color: black;">main</span><span style="color: black;">]</span><span style="color: black;">{</span>
<span style="color: black;">color</span><span style="color: black;">:</span><span style="color: black;">#0cf</span><span style="color: black;">;</span>
<span style="color: black;">font-family</span><span style="color: black;">:</span> <span style="color: black;">"宋体"</span><span style="color: black;">;</span>
<span style="color: black;">font-size</span><span style="color: black;">:</span><span style="color: black;">20</span><span style="color: black;">px</span><span style="color: black;">;</span>
<span style="color: black;">}</span>
<span style="color: black;"></</span><span style="color: black;">style</span><span style="color: black;">></span>
</div>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">2.子代<span style="color: black;">选取</span>器<span style="color: black;">重点</span>用来<span style="color: black;">选取</span>某个元素的<span style="color: black;">第1</span>级子元素。</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><span style="color: black;">期盼</span><span style="color: black;">选取</span>只<span style="color: black;">做为</span> h1 元素子元素的 strong 元素，<span style="color: black;">能够</span><span style="color: black;">这般</span>写：h1 > strong。</p>
<div style="color: black; text-align: left; margin-bottom: 10px;"><span style="color: black;"><</span><span style="color: black;">style</span> <span style="color: black;">type</span><span style="color: black;">=</span><span style="color: black;">"text/css"</span><span style="color: black;">></span>
<span style="color: black;">h1</span><span style="color: black;">></span><span style="color: black;">strong</span><span style="color: black;">{</span>
<span style="color: black;">color</span><span style="color: black;">:</span><span style="color: black;">red</span><span style="color: black;">;</span>
<span style="color: black;">font-size</span><span style="color: black;">:</span><span style="color: black;">20</span><span style="color: black;">px</span><span style="color: black;">;</span>
<span style="color: black;">font-family</span><span style="color: black;">:</span><span style="color: black;">"微软雅黑"</span><span style="color: black;">;</span>
<span style="color: black;">}</span>
<span style="color: black;"></</span><span style="color: black;">style</span><span style="color: black;">></span>
</div>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">3.兄弟<span style="color: black;">选取</span>器用来<span style="color: black;">选取</span>与某元素<span style="color: black;">位置于</span>同一个父元素之中，且<span style="color: black;">位置于</span>该元素之后的兄弟元素。</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">临近兄弟<span style="color: black;">选取</span>器:该<span style="color: black;">选取</span>器<span style="color: black;">运用</span>加号“+”来链接前后两个<span style="color: black;">选取</span>器。<span style="color: black;">选取</span>器中的两个元素有同一个父亲，<span style="color: black;">况且</span>第二个元素<span style="color: black;">必要</span>紧跟<span style="color: black;">第1</span>个元素。</p>
<div style="color: black; text-align: left; margin-bottom: 10px;"><span style="color: black;"><</span><span style="color: black;">style</span> <span style="color: black;">type</span><span style="color: black;">=</span><span style="color: black;">"text/css</span></div>
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