css3选择器:read-write和:read-only是什么？如何使用？-css教程-PHP中文网

首页

web前端

css教程

css3选择器:read-write和:read-only是什么？如何使用？

青灯夜游

Nov 24, 2018 am 10:15 AM

css3 选择器

本篇文章给大家带来的内容是介绍css3选择器:read-write和:read-only是什么？如何使用，让大家了解css3的:read-write选择器和:read-only选择器是什么，有什么作用，又是如何使用的。有一定的参考价值，有需要的朋友可以参考一下，希望对你们有所帮助。

css3 :read-write

:read-write是CSS中的一个伪类选择器，它用于匹配用户可编辑的元素，即可读和可写的元素。

属于可编辑类别的元素包括：

1、不是只读且未禁用的元素（任何类型）。这意味着它们既没有设置readonly属性，也没有设置disabled属性。

2、既不是只读也不是禁用的元素（类似于input）。</p> <p>3、不是<input>或<textarea>，但具有contenteditable属性集的任何其他元素。</p> <p>注意: 目前, 在大多浏览器中, :read-write 选择器只使用于设置了input 和 textarea 元素。</p> <p><strong>css3 :read-only</strong></p> <p>:read-only同样也是CSS中的一个伪类选择器，匹配任何与:read-write选择器不匹配的元素。</p> <p>换句话说，:read-only伪类选择器匹配的是用户不可编辑的元素，即匹配任何不属于上面<span style="color: rgb(255, 0, 0);">↑</span>可编辑的任何元素。比如：设置了readonly，或disabled等属性的元素。</p> <p>以下是使用:read-write可以匹配的元素示例：</p><div class="code" style="position:relative; padding:0px; margin:0px;"><pre class='brush:php;toolbar:false;'>< input type = “text” > < input type = “number” > < textarea name = “nm” id = “id” cols = “30” rows = “10” > </ textarea > < div class = “random” contenteditable > </ div ></pre><div class="contentsignin">登录后复制</div></div><p>以下是使用:read-write不可以匹配的元素，即使用:read-only可以匹配的元素示例：<br/></p><div class="code" style="position:relative; padding:0px; margin:0px;"><pre class='brush:php;toolbar:false;'>< input type = “text” disabled > < input type = “number” disabled > < input type = “number” readonly > < textarea name = “nm” id = “id” cols = “30” rows = “10” readonly > </ textarea > < div class = “random” > </ div > <！ - 无法使用contenteditable编辑的常规元素 - ></pre><div class="contentsignin">登录后复制</div></div><p>尽管这是规范推荐的行为，但浏览器行为似乎有所不同：可能在一个浏览器中认为读写的内容在另一个浏览器中就会被认为是只读的，因此我们应用的:read-write样式可能不适用于某些浏览器。</p><p>就像其他伪类选择器一样，:read-write选择器和:read-only选择器都可以与其他选择器链接，比如:hover和伪元素::after。</p><p>例如，:read-write+:focus将为可编辑文本区域提供样式：</p><div class="code" style="position:relative; padding:0px; margin:0px;"><pre class='brush:php;toolbar:false;'>textarea:read-write:focus { box-shadow: 0 0 2px 1px rgba(0,0,0,0.2); } textarea:read-write:before { content: "Type here..."; color: #aaa; }</pre><div class="contentsignin">登录后复制</div></div><p>例如，:read-only + :hover将为页面上的div（常规）提供样式：</p><div class="code" style="position:relative; padding:0px; margin:0px;"><pre class='brush:php;toolbar:false;'>div:read-only:hover { background-color: #eee; } div:read-only:before { content: "?"; color: deepPink; }</pre><div class="contentsignin">登录后复制</div></div><p><strong><span style="font-size: 16px;">浏览器支持</span></strong></p> <p><img src="/static/imghw/default1.png" data-src="https://img.php.cn//upload/image/788/186/271/1543025190917158.jpg" class="lazy" title="1543025190917158.jpg" alt="2.jpg">表格中的数字表示支持该属性的第一个浏览器版本号。</p> <p>在Firefox浏览器中要使用前缀：-moz-read-write，-moz-read-only；且在Internet Explorer和Android上read-write选择器和read-only选择器无法被支持使用。</p> <p>总结：以上就是本篇文章的全部内容，希望能对大家的学习有所帮助。相关视频教程推荐：<a href="http://www.php.cn/course/list/14.html" target="_blank">CSS3教程</a>！</p><p>以上是css3选择器:read-write和:read-only是什么？如何使用？的详细内容。更多信息请关注PHP中文网其他相关文章！</p> </div> </div> <div class="wzconShengming_sp"> <div class="bzsmdiv_sp">本站声明</div> <div>本文内容由网友自发贡献，版权归原作者所有，本站不承担相应法律责任。如您发现有涉嫌抄袭侵权的内容，请联系admin@php.cn</div> </div> </div> <ins class="adsbygoogle" style="display:block" data-ad-format="autorelaxed" data-ad-client="ca-pub-5902227090019525" data-ad-slot="2507867629"></ins> <script> (adsbygoogle = window.adsbygoogle || []).push({}); </script> <div class="AI_ToolDetails_main4sR"> <ins class="adsbygoogle" style="display:block" data-ad-client="ca-pub-5902227090019525" data-ad-slot="3653428331" data-ad-format="auto" data-full-width-responsive="true"></ins> <script> (adsbygoogle = window.adsbygoogle || []).push({}); </script>  <div class="phpgenera_Details_mainR3"> <div class="phpmain1_4R_readrank"> <div class="phpmain1_4R_readrank_top"> <img onerror="this.onerror=''; this.src='/static/imghw/default1.png'" onerror="this.onerror=''; this.src='/static/imghw/default1.png'" src="/static/imghw/hottools2.png" alt="" /> <h2>热AI工具</h2> </div> <div class="phpgenera_Details_mainR3_bottom"> <div class="phpmain_tab2_mids_top"> <a href="https://www.php.cn/zh/ai/undresserai-undress" title="Undresser.AI Undress" class="phpmain_tab2_mids_top_img"> <img onerror="this.onerror=''; this.src='/static/imghw/default1.png'" onerror="this.onerror=''; this.src='/static/imghw/default1.png'" class="lazy" data-src="https://img.php.cn/upload/ai_manual/001/246/273/173411540686492.jpg?x-oss-process=image/resize,m_fill,h_50,w_50" src="/static/imghw/default1.png" alt="Undresser.AI Undress" /> </a> <div class="phpmain_tab2_mids_info"> <a href="https://www.php.cn/zh/ai/undresserai-undress" title="Undresser.AI Undress" class="phpmain_tab2_mids_title"> <h3>Undresser.AI Undress</h3> </a> <p>人工智能驱动的应用程序，用于创建逼真的裸体照片</p> </div> </div> <div class="phpmain_tab2_mids_top"> <a href="https://www.php.cn/zh/ai/ai-clothes-remover" title="AI Clothes Remover" class="phpmain_tab2_mids_top_img"> <img onerror="this.onerror=''; this.src='/static/imghw/default1.png'" onerror="this.onerror=''; this.src='/static/imghw/default1.png'" class="lazy" data-src="https://img.php.cn/upload/ai_manual/001/246/273/173411552797167.jpg?x-oss-process=image/resize,m_fill,h_50,w_50" src="/static/imghw/default1.png" alt="AI Clothes Remover" /> </a> <div class="phpmain_tab2_mids_info"> <a href="https://www.php.cn/zh/ai/ai-clothes-remover" title="AI Clothes Remover" class="phpmain_tab2_mids_title"> <h3>AI Clothes Remover</h3> </a> <p>用于从照片中去除衣服的在线人工智能工具。</p> </div> </div> <div class="phpmain_tab2_mids_top"> <a href="https://www.php.cn/zh/ai/undress-ai-tool" title="Undress AI Tool" class="phpmain_tab2_mids_top_img"> <img onerror="this.onerror=''; this.src='/static/imghw/default1.png'" onerror="this.onerror=''; this.src='/static/imghw/default1.png'" class="lazy" data-src="https://img.php.cn/upload/ai_manual/001/246/273/173410641626608.jpg?x-oss-process=image/resize,m_fill,h_50,w_50" src="/static/imghw/default1.png" alt="Undress AI Tool" /> </a> <div class="phpmain_tab2_mids_info"> <a href="https://www.php.cn/zh/ai/undress-ai-tool" title="Undress AI Tool" class="phpmain_tab2_mids_title"> <h3>Undress AI Tool</h3> </a> <p>免费脱衣服图片</p> </div> </div> <div class="phpmain_tab2_mids_top"> <a href="https://www.php.cn/zh/ai/clothoffio" title="Clothoff.io" class="phpmain_tab2_mids_top_img"> <img onerror="this.onerror=''; this.src='/static/imghw/default1.png'" onerror="this.onerror=''; this.src='/static/imghw/default1.png'" class="lazy" data-src="https://img.php.cn/upload/ai_manual/001/246/273/173411529149311.jpg?x-oss-process=image/resize,m_fill,h_50,w_50" src="/static/imghw/default1.png" alt="Clothoff.io" /> </a> <div class="phpmain_tab2_mids_info"> <a href="https://www.php.cn/zh/ai/clothoffio" title="Clothoff.io" class="phpmain_tab2_mids_title"> <h3>Clothoff.io</h3> </a> <p>AI脱衣机</p> </div> </div> <div class="phpmain_tab2_mids_top"> <a href="https://www.php.cn/zh/ai/ai-hentai-generator" title="AI Hentai Generator" class="phpmain_tab2_mids_top_img"> <img onerror="this.onerror=''; this.src='/static/imghw/default1.png'" onerror="this.onerror=''; this.src='/static/imghw/default1.png'" class="lazy" data-src="https://img.php.cn/upload/ai_manual/001/246/273/173405034393877.jpg?x-oss-process=image/resize,m_fill,h_50,w_50" src="/static/imghw/default1.png" alt="AI Hentai Generator" /> </a> <div class="phpmain_tab2_mids_info"> <a href="https://www.php.cn/zh/ai/ai-hentai-generator" title="AI Hentai Generator" class="phpmain_tab2_mids_title"> <h3>AI Hentai Generator</h3> </a> <p>免费生成ai无尽的。</p> </div> </div> </div> <div class="phpgenera_Details_mainR3_more"> <a href="https://www.php.cn/zh/ai">显示更多</a> </div> </div> </div> <script src="https://sw.php.cn/hezuo/cac1399ab368127f9b113b14eb3316d0.js" type="text/javascript"></script> <div class="phpgenera_Details_mainR4"> <div class="phpmain1_4R_readrank"> <div class="phpmain1_4R_readrank_top"> <img onerror="this.onerror=''; this.src='/static/imghw/default1.png'" onerror="this.onerror=''; this.src='/static/imghw/default1.png'" src="/static/imghw/hotarticle2.png" alt="" /> <h2>热门文章</h2> </div> <div class="phpgenera_Details_mainR4_bottom"> <div class="phpgenera_Details_mainR4_bottoms"> <a href="https://www.php.cn/zh/faq/1796780570.html" title="R.E.P.O.能量晶体解释及其做什么（黄色晶体）" class="phpgenera_Details_mainR4_bottom_title">R.E.P.O.能量晶体解释及其做什么（黄色晶体）</a> <div class="phpgenera_Details_mainR4_bottoms_info"> <span>4 周前</span> <span>By 尊渡假赌尊渡假赌尊渡假赌</span> </div> </div> <div class="phpgenera_Details_mainR4_bottoms"> <a href="https://www.php.cn/zh/faq/1796780641.html" title="R.E.P.O.最佳图形设置" class="phpgenera_Details_mainR4_bottom_title">R.E.P.O.最佳图形设置</a> <div class="phpgenera_Details_mainR4_bottoms_info"> <span>4 周前</span> <span>By 尊渡假赌尊渡假赌尊渡假赌</span> </div> </div> <div class="phpgenera_Details_mainR4_bottoms"> <a href="https://www.php.cn/zh/faq/1796785841.html" title="刺客信条阴影：贝壳谜语解决方案" class="phpgenera_Details_mainR4_bottom_title">刺客信条阴影：贝壳谜语解决方案</a> <div class="phpgenera_Details_mainR4_bottoms_info"> <span>2 周前</span> <span>By DDD</span> </div> </div> <div class="phpgenera_Details_mainR4_bottoms"> <a href="https://www.php.cn/zh/faq/1796780520.html" title="R.E.P.O.如果您听不到任何人，如何修复音频" class="phpgenera_Details_mainR4_bottom_title">R.E.P.O.如果您听不到任何人，如何修复音频</a> <div class="phpgenera_Details_mainR4_bottoms_info"> <span>4 周前</span> <span>By 尊渡假赌尊渡假赌尊渡假赌</span> </div> </div> <div class="phpgenera_Details_mainR4_bottoms"> <a href="https://www.php.cn/zh/faq/1796780523.html" title="R.E.P.O.聊天命令以及如何使用它们" class="phpgenera_Details_mainR4_bottom_title">R.E.P.O.聊天命令以及如何使用它们</a> <div class="phpgenera_Details_mainR4_bottoms_info"> <span>4 周前</span> <span>By 尊渡假赌尊渡假赌尊渡假赌</span> </div> </div> </div> <div class="phpgenera_Details_mainR3_more"> <a href="https://www.php.cn/zh/article.html">显示更多</a> </div> </div> </div> <div class="phpgenera_Details_mainR3"> <div class="phpmain1_4R_readrank"> <div class="phpmain1_4R_readrank_top"> <img onerror="this.onerror=''; this.src='/static/imghw/default1.png'" onerror="this.onerror=''; this.src='/static/imghw/default1.png'" src="/static/imghw/hottools2.png" alt="" /> <h2>热工具</h2> </div> <div class="phpgenera_Details_mainR3_bottom"> <div class="phpmain_tab2_mids_top"> <a href="https://www.php.cn/zh/toolset/development-tools/92" title="记事本++7.3.1" class="phpmain_tab2_mids_top_img"> <img onerror="this.onerror=''; this.src='/static/imghw/default1.png'" onerror="this.onerror=''; this.src='/static/imghw/default1.png'" class="lazy" data-src="https://img.php.cn/upload/manual/000/000/001/58ab96f0f39f7357.jpg?x-oss-process=image/resize,m_fill,h_50,w_72" src="/static/imghw/default1.png" alt="记事本++7.3.1" /> </a> <div class="phpmain_tab2_mids_info"> <a href="https://www.php.cn/zh/toolset/development-tools/92" title="记事本++7.3.1" class="phpmain_tab2_mids_title"> <h3>记事本++7.3.1</h3> </a> <p>好用且免费的代码编辑器</p> </div> </div> <div class="phpmain_tab2_mids_top"> <a href="https://www.php.cn/zh/toolset/development-tools/93" title="SublimeText3汉化版" class="phpmain_tab2_mids_top_img"> <img onerror="this.onerror=''; this.src='/static/imghw/default1.png'" onerror="this.onerror=''; this.src='/static/imghw/default1.png'" class="lazy" data-src="https://img.php.cn/upload/manual/000/000/001/58ab97a3baad9677.jpg?x-oss-process=image/resize,m_fill,h_50,w_72" src="/static/imghw/default1.png" alt="SublimeText3汉化版" /> </a> <div class="phpmain_tab2_mids_info"> <a href="https://www.php.cn/zh/toolset/development-tools/93" title="SublimeText3汉化版" class="phpmain_tab2_mids_title"> <h3>SublimeText3汉化版</h3> </a> <p>中文版，非常好用</p> </div> </div> <div class="phpmain_tab2_mids_top"> <a href="https://www.php.cn/zh/toolset/development-tools/121" title="禅工作室 13.0.1" class="phpmain_tab2_mids_top_img"> <img onerror="this.onerror=''; this.src='/static/imghw/default1.png'" onerror="this.onerror=''; this.src='/static/imghw/default1.png'" class="lazy" data-src="https://img.php.cn/upload/manual/000/000/001/58ab97ecd1ab2670.jpg?x-oss-process=image/resize,m_fill,h_50,w_72" src="/static/imghw/default1.png" alt="禅工作室 13.0.1" /> </a> <div class="phpmain_tab2_mids_info"> <a href="https://www.php.cn/zh/toolset/development-tools/121" title="禅工作室 13.0.1" class="phpmain_tab2_mids_title"> <h3>禅工作室 13.0.1</h3> </a> <p>功能强大的PHP集成开发环境</p> </div> </div> <div class="phpmain_tab2_mids_top"> <a href="https://www.php.cn/zh/toolset/development-tools/469" title="Dreamweaver CS6" class="phpmain_tab2_mids_top_img"> <img onerror="this.onerror=''; this.src='/static/imghw/default1.png'" onerror="this.onerror=''; this.src='/static/imghw/default1.png'" class="lazy" data-src="https://img.php.cn/upload/manual/000/000/001/58d0e0fc74683535.jpg?x-oss-process=image/resize,m_fill,h_50,w_72" src="/static/imghw/default1.png" alt="Dreamweaver CS6" /> </a> <div class="phpmain_tab2_mids_info"> <a href="https://www.php.cn/zh/toolset/development-tools/469" title="Dreamweaver CS6" class="phpmain_tab2_mids_title"> <h3>Dreamweaver CS6</h3> </a> <p>视觉化网页开发工具</p> </div> </div> <div class="phpmain_tab2_mids_top"> <a href="https://www.php.cn/zh/toolset/development-tools/500" title="SublimeText3 Mac版" class="phpmain_tab2_mids_top_img"> <img onerror="this.onerror=''; this.src='/static/imghw/default1.png'" onerror="this.onerror=''; this.src='/static/imghw/default1.png'" class="lazy" data-src="https://img.php.cn/upload/manual/000/000/001/58d34035e2757995.png?x-oss-process=image/resize,m_fill,h_50,w_72" src="/static/imghw/default1.png" alt="SublimeText3 Mac版" /> </a> <div class="phpmain_tab2_mids_info"> <a href="https://www.php.cn/zh/toolset/development-tools/500" title="SublimeText3 Mac版" class="phpmain_tab2_mids_title"> <h3>SublimeText3 Mac版</h3> </a> <p>神级代码编辑软件(SublimeText3)</p> </div> </div> </div> <div class="phpgenera_Details_mainR3_more"> <a href="https://www.php.cn/zh/ai">显示更多</a> </div> </div> </div> <div class="phpgenera_Details_mainR4"> <div class="phpmain1_4R_readrank"> <div class="phpmain1_4R_readrank_top"> <img onerror="this.onerror=''; this.src='/static/imghw/default1.png'" onerror="this.onerror=''; this.src='/static/imghw/default1.png'" src="/static/imghw/hotarticle2.png" alt="" /> <h2>热门话题</h2> </div> <div class="phpgenera_Details_mainR4_bottom"> <div class="phpgenera_Details_mainR4_bottoms"> <a href="https://www.php.cn/zh/faq/gmailyxdlrkzn" title="gmail邮箱登陆入口在哪里" class="phpgenera_Details_mainR4_bottom_title">gmail邮箱登陆入口在哪里</a> <div class="phpgenera_Details_mainR4_bottoms_info"> <div class="phpgenera_Details_mainR4_bottoms_infos"> <img src="/static/imghw/eyess.png" alt="" /> <span>7523</span> </div> <div class="phpgenera_Details_mainR4_bottoms_infos"> <img src="/static/imghw/tiezi.png" alt="" /> <span>15</span> </div> </div> </div> <div class="phpgenera_Details_mainR4_bottoms"> <a href="https://www.php.cn/zh/faq/cakephp-tutor" title="CakePHP 教程" class="phpgenera_Details_mainR4_bottom_title">CakePHP 教程</a> <div class="phpgenera_Details_mainR4_bottoms_info"> <div class="phpgenera_Details_mainR4_bottoms_infos"> <img src="/static/imghw/eyess.png" alt="" /> <span>1378</span> </div> <div class="phpgenera_Details_mainR4_bottoms_infos"> <img src="/static/imghw/tiezi.png" alt="" /> <span>52</span> </div> </div> </div> <div class="phpgenera_Details_mainR4_bottoms"> <a href="https://www.php.cn/zh/faq/steamdzhmcssmgs" title="steam的账户名称是什么格式" class="phpgenera_Details_mainR4_bottom_title">steam的账户名称是什么格式</a> <div class="phpgenera_Details_mainR4_bottoms_info"> <div class="phpgenera_Details_mainR4_bottoms_infos"> <img src="/static/imghw/eyess.png" alt="" /> <span>81</span> </div> <div class="phpgenera_Details_mainR4_bottoms_infos"> <img src="/static/imghw/tiezi.png" alt="" /> <span>11</span> </div> </div> </div> <div class="phpgenera_Details_mainR4_bottoms"> <a href="https://www.php.cn/zh/faq/winactivationkeyper" title="win11激活密钥永久" class="phpgenera_Details_mainR4_bottom_title">win11激活密钥永久</a> <div class="phpgenera_Details_mainR4_bottoms_info"> <div class="phpgenera_Details_mainR4_bottoms_infos"> <img src="/static/imghw/eyess.png" alt="" /> <span>54</span> </div> <div class="phpgenera_Details_mainR4_bottoms_infos"> <img src="/static/imghw/tiezi.png" alt="" /> <span>19</span> </div> </div> </div> <div class="phpgenera_Details_mainR4_bottoms"> <a href="https://www.php.cn/zh/faq/newyorktimesdailybrief" title="NYT连接提示和答案" class="phpgenera_Details_mainR4_bottom_title">NYT连接提示和答案</a> <div class="phpgenera_Details_mainR4_bottoms_info"> <div class="phpgenera_Details_mainR4_bottoms_infos"> <img src="/static/imghw/eyess.png" alt="" /> <span>21</span> </div> <div class="phpgenera_Details_mainR4_bottoms_infos"> <img src="/static/imghw/tiezi.png" alt="" /> <span>74</span> </div> </div> </div> </div> <div class="phpgenera_Details_mainR3_more"> <a href="https://www.php.cn/zh/faq/zt">显示更多</a> </div> </div> </div> </div> </div> <div class="Article_Details_main2"> <div class="phpgenera_Details_mainL4"> <div class="phpmain1_2_top"> <a href="javascript:void(0);" class="phpmain1_2_top_title">Related knowledge<img src="/static/imghw/index2_title2.png" alt="" /></a> </div> <div class="phpgenera_Details_mainL4_info"> <div class="phphistorical_Version2_mids"> <a href="https://www.php.cn/zh/faq/496068.html" title="css3怎么实现花边边框" class="phphistorical_Version2_mids_img"> <img onerror="this.onerror=''; this.src='/static/imghw/default1.png'" src="/static/imghw/default1.png" class="lazy" data-src="https://img.php.cn/upload/article/000/000/024/6324593180439447.jpg?x-oss-process=image/resize,m_fill,h_207,w_330" alt="css3怎么实现花边边框" /> </a> <a href="https://www.php.cn/zh/faq/496068.html" title="css3怎么实现花边边框" class="phphistorical_Version2_mids_title">css3怎么实现花边边框</a> <span class="Articlelist_txts_time">Sep 16, 2022 pm 07:11 PM</span> <p class="Articlelist_txts_p">在css中，可以利用border-image属性来实现花边边框。border-image属性可以使用图片来创建边框，即给边框加上背景图片，只需要将背景图片指定为花边样式即可；语法“border-image: url(图片路径) 向内偏移值图像边界宽度 outset 是否重复;”。</p> </div> <div class="phphistorical_Version2_mids"> <a href="https://www.php.cn/zh/faq/496167.html" title="css中id选择符的标识是什么" class="phphistorical_Version2_mids_img"> <img onerror="this.onerror=''; this.src='/static/imghw/default1.png'" src="/static/imghw/default1.png" class="lazy" data-src="https://img.php.cn/upload/article/202209/22/2022092215382122250.jpg?x-oss-process=image/resize,m_fill,h_207,w_330" alt="css中id选择符的标识是什么" /> </a> <a href="https://www.php.cn/zh/faq/496167.html" title="css中id选择符的标识是什么" class="phphistorical_Version2_mids_title">css中id选择符的标识是什么</a> <span class="Articlelist_txts_time">Sep 22, 2022 pm 03:57 PM</span> <p class="Articlelist_txts_p">在css中，id选择符的标识是“#”，可以为标有特定id属性值的HTML元素指定特定的样式，语法结构“#ID值 {属性 : 属性值;}”。ID属性在整个页面中是唯一不可重复的；ID属性值不要以数字开头，数字开头的ID在Mozilla/Firefox浏览器中不起作用。</p> </div> <div class="phphistorical_Version2_mids"> <a href="https://www.php.cn/zh/faq/629094.html" title="使用:nth-child(n+3)伪类选择器选择位置大于等于3的子元素的样式" class="phphistorical_Version2_mids_img"> <img onerror="this.onerror=''; this.src='/static/imghw/default1.png'" src="/static/imghw/default1.png" class="lazy" data-src="https://img.php.cn/upload/article/000/465/014/170045044029480.jpg?x-oss-process=image/resize,m_fill,h_207,w_330" alt="使用:nth-child(n+3)伪类选择器选择位置大于等于3的子元素的样式" /> </a> <a href="https://www.php.cn/zh/faq/629094.html" title="使用:nth-child(n+3)伪类选择器选择位置大于等于3的子元素的样式" class="phphistorical_Version2_mids_title">使用:nth-child(n+3)伪类选择器选择位置大于等于3的子元素的样式</a> <span class="Articlelist_txts_time">Nov 20, 2023 am 11:20 AM</span> <p class="Articlelist_txts_p">使用:nth-child(n+3)伪类选择器选择位置大于等于3的子元素的样式，具体代码示例如下：HTML代码：<divid="container"><divclass="item">第一个子元素</div><divclass="item"&</p> </div> <div class="phphistorical_Version2_mids"> <a href="https://www.php.cn/zh/faq/500827.html" title="javascript选择器失效怎么办" class="phphistorical_Version2_mids_img"> <img onerror="this.onerror=''; this.src='/static/imghw/default1.png'" src="/static/imghw/default1.png" class="lazy" data-src="https://img.php.cn/upload/article/202302/10/2023021010132241285.jpg?x-oss-process=image/resize,m_fill,h_207,w_330" alt="javascript选择器失效怎么办" /> </a> <a href="https://www.php.cn/zh/faq/500827.html" title="javascript选择器失效怎么办" class="phphistorical_Version2_mids_title">javascript选择器失效怎么办</a> <span class="Articlelist_txts_time">Feb 10, 2023 am 10:15 AM</span> <p class="Articlelist_txts_p">javascript选择器失效是因为代码不规范导致的，其解决办法：1、把引入的JS代码去掉，ID选择器方法即可有效；2、在引入“jquery.js”之前引入指定JS代码即可。</p> </div> <div class="phphistorical_Version2_mids"> <a href="https://www.php.cn/zh/faq/496457.html" title="CSS新特性学习：方向裁切overflow:clip" class="phphistorical_Version2_mids_img"> <img onerror="this.onerror=''; this.src='/static/imghw/default1.png'" src="/static/imghw/default1.png" class="lazy" data-src="https://img.php.cn/upload/article/000/000/024/63454f463d47c423.jpg?x-oss-process=image/resize,m_fill,h_207,w_330" alt="CSS新特性学习：方向裁切overflow:clip" /> </a> <a href="https://www.php.cn/zh/faq/496457.html" title="CSS新特性学习：方向裁切overflow:clip" class="phphistorical_Version2_mids_title">CSS新特性学习：方向裁切overflow:clip</a> <span class="Articlelist_txts_time">Oct 11, 2022 pm 07:12 PM</span> <p class="Articlelist_txts_p">本篇文章将介绍一个新特性，从 Chrome 90 开始，overflow 新增的一个新特性 -- overflow: clip，使用它，轻松的对溢出方向进行控制。</p> </div> <div class="phphistorical_Version2_mids"> <a href="https://www.php.cn/zh/faq/495587.html" title="css中的选择器包括超文本标记选择器吗" class="phphistorical_Version2_mids_img"> <img onerror="this.onerror=''; this.src='/static/imghw/default1.png'" src="/static/imghw/default1.png" class="lazy" data-src="https://img.php.cn/upload/article/000/000/024/631079bcbb711256.jpg?x-oss-process=image/resize,m_fill,h_207,w_330" alt="css中的选择器包括超文本标记选择器吗" /> </a> <a href="https://www.php.cn/zh/faq/495587.html" title="css中的选择器包括超文本标记选择器吗" class="phphistorical_Version2_mids_title">css中的选择器包括超文本标记选择器吗</a> <span class="Articlelist_txts_time">Sep 01, 2022 pm 05:25 PM</span> <p class="Articlelist_txts_p">不包括。css选择器有：1、标签选择器，是通过HTML页面的元素名定位具体HTML元素；2、类选择器，是通过HTML元素的class属性的值定位具体HTML元素；3、ID选择器，是通过HTML元素的id属性的值定位具体HTML元素；4、通配符选择器“*”，可以指代所有类型的标签元素，包括自定义元素；5、属性选择器，是通过HTML元素已经存在属性名或属性值来定位具体HTML元素。</p> </div> <div class="phphistorical_Version2_mids"> <a href="https://www.php.cn/zh/faq/604716.html" title="深度解析is与where选择器：提升CSS编程水平" class="phphistorical_Version2_mids_img"> <img onerror="this.onerror=''; this.src='/static/imghw/default1.png'" src="/static/imghw/default1.png" class="lazy" data-src="https://img.php.cn/upload/article/000/000/164/169417577128346.jpg?x-oss-process=image/resize,m_fill,h_207,w_330" alt="深度解析is与where选择器：提升CSS编程水平" /> </a> <a href="https://www.php.cn/zh/faq/604716.html" title="深度解析is与where选择器：提升CSS编程水平" class="phphistorical_Version2_mids_title">深度解析is与where选择器：提升CSS编程水平</a> <span class="Articlelist_txts_time">Sep 08, 2023 pm 08:22 PM</span> <p class="Articlelist_txts_p">深度解析is与where选择器：提升CSS编程水平引言：在CSS编程过程中，选择器是必不可少的元素。它们允许我们根据特定的条件选择HTML文档中的元素并对其进行样式化。在这篇文章中，我们将深入探讨两个常用的选择器，即：is选择器和where选择器。通过了解它们的工作原理和使用场景，我们可以大大提升CSS编程的水平。一、is选择器is选择器是一个非常强大的选择</p> </div> <div class="phphistorical_Version2_mids"> <a href="https://www.php.cn/zh/faq/604045.html" title="从入门到精通：掌握is与where选择器的使用技巧" class="phphistorical_Version2_mids_img"> <img onerror="this.onerror=''; this.src='/static/imghw/default1.png'" src="/static/imghw/default1.png" class="lazy" data-src="https://img.php.cn/upload/article/000/887/227/169413573489834.jpg?x-oss-process=image/resize,m_fill,h_207,w_330" alt="从入门到精通：掌握is与where选择器的使用技巧" /> </a> <a href="https://www.php.cn/zh/faq/604045.html" title="从入门到精通：掌握is与where选择器的使用技巧" class="phphistorical_Version2_mids_title">从入门到精通：掌握is与where选择器的使用技巧</a> <span class="Articlelist_txts_time">Sep 08, 2023 am 09:15 AM</span> <p class="Articlelist_txts_p">从入门到精通：掌握is与where选择器的使用技巧引言：在进行数据处理和分析的过程中，选择器（selector）是一项非常重要的工具。通过选择器，我们可以按照特定的条件从数据集中提取所需的数据。本文将介绍is和where选择器的使用技巧，帮助读者快速掌握这两个选择器的强大功能。一、is选择器的使用is选择器是一种基本的选择器，它允许我们根据给定条件对数据集进</p> </div> </div> <a href="https://www.php.cn/zh/web-designer.html" class="phpgenera_Details_mainL4_botton"> <span>See all articles</span> <img src="/static/imghw/down_right.png" alt="" /> </a> </div> </div> </div> </main> <footer> <div class="footer"> <div class="footertop"> <img src="/static/imghw/logo.png" alt=""> <p>公益在线PHP培训，帮助PHP学习者快速成长！</p> </div> <div class="footermid"> <a href="https://www.php.cn/zh/about/us.html">关于我们</a> <a href="https://www.php.cn/zh/about/disclaimer.html">免责声明</a> <a href="https://www.php.cn/zh/update/article_0_1.html">Sitemap</a> </div> <div class="footerbottom"> <p> © php.cn All rights reserved </p> </div> </div> </footer> <input type="hidden" id="verifycode" value="/captcha.html"> <script>layui.use(['element', 'carousel'], function () {var element = layui.element;$ = layui.jquery;var carousel = layui.carousel;carousel.render({elem: '#test1', width: '100%', height: '330px', arrow: 'always'});$.getScript('/static/js/jquery.lazyload.min.js', function () {$("img").lazyload({placeholder: "/static/images/load.jpg", effect: "fadeIn", threshold: 200, skip_invisible: false});});});</script> <script src="/static/js/common_new.js"></script> <script type="text/javascript" src="/static/js/jquery.cookie.js?1744777015"></script> <script src="https://vdse.bdstatic.com//search-video.v1.min.js"></script> <link rel='stylesheet' id='_main-css' href='/static/css/viewer.min.css?2' type='text/css' media='all' /> <script type='text/javascript' src='/static/js/viewer.min.js?1'></script> <script type='text/javascript' src='/static/js/jquery-viewer.min.js'></script> <script type="text/javascript" src="/static/js/global.min.js?5.5.53"></script> <script> var _paq = window._paq = window._paq || []; /* tracker methods like "setCustomDimension" should be called before "trackPageView" */ _paq.push(['trackPageView']); _paq.push(['enableLinkTracking']); (function () { var u = "https://tongji.php.cn/"; _paq.push(['setTrackerUrl', u + 'matomo.php']); _paq.push(['setSiteId', '9']); var d = document, g = d.createElement('script'), s = d.getElementsByTagName('script')[0]; g.async = true; g.src = u + 'matomo.js'; s.parentNode.insertBefore(g, s); })(); </script> <script> // top layui.use(function () { var util = layui.util; util.fixbar({ on: { mouseenter: function (type) { layer.tips(type, this, { tips: 4, fixed: true, }); }, mouseleave: function (type) { layer.closeAll("tips"); }, }, }); }); document.addEventListener("DOMContentLoaded", (event) => { // 定义一个函数来处理滚动链接的点击事件 function setupScrollLink(scrollLinkId, targetElementId) { const scrollLink = document.getElementById(scrollLinkId); const targetElement = document.getElementById(targetElementId); if (scrollLink && targetElement) { scrollLink.addEventListener("click", (e) => { e.preventDefault(); // 阻止默认链接行为 targetElement.scrollIntoView({ behavior: "smooth" }); // 平滑滚动到目标元素 }); } else { console.warn( `Either scroll link with ID '${scrollLinkId}' or target element with ID '${targetElementId}' not found.` ); } } // 使用该函数设置多个滚动链接 setupScrollLink("Article_Details_main1L2s_1", "article_main_title1"); setupScrollLink("Article_Details_main1L2s_2", "article_main_title2"); setupScrollLink("Article_Details_main1L2s_3", "article_main_title3"); setupScrollLink("Article_Details_main1L2s_4", "article_main_title4"); setupScrollLink("Article_Details_main1L2s_5", "article_main_title5"); setupScrollLink("Article_Details_main1L2s_6", "article_main_title6"); // 可以继续添加更多的滚动链接设置 }); window.addEventListener("scroll", function () { var fixedElement = document.getElementById("Article_Details_main1Lmain"); var scrollTop = window.scrollY || document.documentElement.scrollTop; // 兼容不同浏览器 var clientHeight = window.innerHeight || document.documentElement.clientHeight; // 视口高度 var scrollHeight = document.documentElement.scrollHeight; // 页面总高度 // 计算距离底部的距离 var distanceToBottom = scrollHeight - scrollTop - clientHeight; // 当距离底部小于或等于300px时，取消固定定位 if (distanceToBottom <= 980) { fixedElement.classList.remove("Article_Details_main1Lmain"); fixedElement.classList.add("Article_Details_main1Lmain_relative"); } else { // 否则，保持固定定位 fixedElement.classList.remove("Article_Details_main1Lmain_relative"); fixedElement.classList.add("Article_Details_main1Lmain"); } }); </script> </body> </html>