9q13nh 发表于 2024-6-30 04:55:29

css选取器的功效是什么?


    <p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><span style="color: black;">非常多</span>自学编程的<span style="color: black;">朋友</span>还不住地css<span style="color: black;">选取</span>器是什么,<span style="color: black;">通常</span>要<span style="color: black;">运用</span>css对HTML页面中的元素实现一对一,一对多<span style="color: black;">或</span>多对一的<span style="color: black;">掌控</span>,这就<span style="color: black;">必须</span>用到CSS<span style="color: black;">选取</span>器。HTML页面中的元素<span style="color: black;">便是</span><span style="color: black;">经过</span>CSS<span style="color: black;">选取</span>器进行<span style="color: black;">掌控</span>的。每一条css样式定义由两部分<span style="color: black;">构成</span>,形式如下: <span style="color: black;">选取</span>器{样式} 在{}之前的部分<span style="color: black;">便是</span>“<span style="color: black;">选取</span>器”。“<span style="color: black;">选取</span>器”指明了{}中的“样式”的<span style="color: black;">功效</span>对象,<span style="color: black;">亦</span><span style="color: black;">便是</span>“样式”<span style="color: black;">功效</span>于网页中的<span style="color: black;">那些</span>元素。</p>
    <p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">css<span style="color: black;">选取</span>器<span style="color: black;">重点</span>有:ID<span style="color: black;">选取</span>器、后代<span style="color: black;">选取</span>器、子<span style="color: black;">选取</span>器、伪类<span style="color: black;">选取</span>器、通用<span style="color: black;">选取</span>器、群组<span style="color: black;">选取</span>器、相邻同胞<span style="color: black;">选取</span>器、属性<span style="color: black;">选取</span>器、伪元素<span style="color: black;">选取</span>器、结构性伪类<span style="color: black;">选取</span>、UI元素状态伪类<span style="color: black;">选取</span>器。<span style="color: black;">那样</span>css<span style="color: black;">选取</span>器的<span style="color: black;">功效</span>是什么呢?下面是我的回答,<span style="color: black;">期盼</span>能够<span style="color: black;">帮忙</span>到你。</p>
    <div style="color: black; text-align: left; margin-bottom: 10px;"><img src="https://pic3.zhimg.com/80/v2-e54717d4630302bac41a5cd5b04962de_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;"><span style="color: black;">构成</span>,形式如下: <span style="color: black;">选取</span>器{样式} 在{}之前的部分<span style="color: black;">便是</span>“<span style="color: black;">选取</span>器”。 “<span style="color: black;">选取</span>器”指明了{}中的“样式”的<span style="color: black;">功效</span>对象,<span style="color: black;">亦</span><span style="color: black;">便是</span>“样式”<span style="color: black;">功效</span>于网页中的<span style="color: black;">那些</span>元素。</p>
    <p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">要<span style="color: black;">运用</span>css对HTML页面中的元素实现一对一,一对多<span style="color: black;">或</span>多对一的<span style="color: black;">掌控</span>,这就<span style="color: black;">必须</span>用到CSS<span style="color: black;">选取</span>器。HTML页面中的元素<span style="color: black;">便是</span><span style="color: black;">经过</span>CSS<span style="color: black;">选取</span>器进行<span style="color: black;">掌控</span>的。</p>
    <p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">A<span style="color: black;">表率</span>:标签名<span style="color: black;">叫作</span>为 A 的元素</p>
    <p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">#A<span style="color: black;">表率</span>:id 属性值为 A 的元素</p>
    <p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">.A<span style="color: black;">表率</span>:class 属性(脚本<span style="color: black;">拜访</span>时此属性名为 className)值<span style="color: black;">包含</span> A的元素</p>




nqkk58 发表于 2024-10-5 21:28:17

网站建设seio论坛http://www.fok120.com/

4zhvml8 发表于 2024-11-8 20:10:01

“沙发”(SF,第一个回帖的人)‌

1fy07h 发表于 2024-11-12 05:25:59

感谢您的精彩评论,为我带来了新的思考角度。

b1gc8v 发表于 前天 04:35

网站建设seio论坛http://www.fok120.com/
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