css中的单冒号和双冒号以及伪类和伪元素

时间 2021-01-04

原文原文链接

单冒号(:)用于CSS3伪类，双冒号(::)用于CSS3伪元素。伪元素由双冒号和伪元素名称组成。双冒号是在css3规范中引入的，用于区分伪类和伪元素。但是伪类兼容现存样式，浏览器需要同时支持旧的伪类，比如:first-line、:first-letter、:before、:after 1、伪类与伪元素　　什么叫伪类呢？　　伪类是基于元素的特征而不是他们的id、class、属性或者内容。一般来

>>阅读原文<<

1. CSS中的单冒号和双冒号（伪类及伪元素）
2. css中的单冒号和双冒号
3. 关于伪类与伪元素及其前面的冒号和两个冒号的使用
4. CSS3:伪类前的冒号和两个冒号区别
5. CSS伪类和伪元素
6. 伪类和伪元素
7. css伪类和伪元素
8. 伪元素和伪类
9. css—伪类和伪元素
10. CSS中的伪类和伪元素
更多相关文章...
• MySQL的版本以及版本号 - MySQL教程
• RSS , <link>, 和 <description> 元素</a> - <a href="http://www.voidme.com/rss" target="_blank" title="RSS 教程"> RSS 教程</a></li> <li> • <a href="http://www.voidme.com/content/fykxkspdpu-bsx" target="_blank" title="TiDB 在摩拜单车在线数据业务的应用和实践"> TiDB 在摩拜单车在线数据业务的应用和实践</a> </li> <li> • <a href="http://www.voidme.com/content/kzhcgkljmp-bsx" target="_blank" title="适用于PHP初学者的学习线路和建议"> 适用于PHP初学者的学习线路和建议</a> </li> </ul> <div class="margin-top-20"></div> <div> <div></div> </div> <div class="margin-top-20"></div> <div class="relative">相关标签/搜索</div> <ul> <a target='_blank' href="http://www.javashuo.com/tag/%E5%86%92%E5%8F%B7" title="冒号"> <span class="new-label">冒号</span></a> <a target='_blank' href="http://www.javashuo.com/tag/%E5%86%92%E5%8F%B7%E8%AF%BE%E5%A0%82" title="冒号课堂"> <span class="new-label">冒号课堂</span></a> <a target='_blank' href="http://www.javashuo.com/tag/%E5%85%83%E7%B4%A0%E7%AC%A6%E5%8F%B7" title="元素符号"> <span class="new-label">元素符号</span></a> <a target='_blank' href="http://www.javashuo.com/tag/%E5%8F%8C%E5%8F%B7" title="双号"> <span class="new-label">双号</span></a> <a target='_blank' href="http://www.javashuo.com/tag/%E4%BC%AA%E7%B1%BB%2F%E5%85%83%E7%B4%A0%E9%80%89%E6%8B%A9%E5%99%A8" title="伪类/元素选择器"> <span class="new-label">伪类/元素选择器</span></a> <a target='_blank' href="http://www.javashuo.com/tag/%E5%8D%95%E5%8F%B7" title="单号"> <span class="new-label">单号</span></a> <a target='_blank' href="http://www.javashuo.com/tag/%E4%B8%AD%E5%92%8C" title="中和"> <span class="new-label">中和</span></a> <a target='_blank' href="http://www.javashuo.com/column/css " title="CSS"> <span class="new-label">CSS</span></a> <a href="http://www.voidme.com/xlink" target="_blank" title="XLink 和 XPointer 教程"> <span class="new-label">XLink 和 XPointer 教程</span></a> <a href="http://www.voidme.com/mybatis" target="_blank" title="MyBatis教程"> <span class="new-label">MyBatis教程</span></a> <a href="http://www.voidme.com/php7" target="_blank" title="PHP 7 新特性"> <span class="new-label">PHP 7 新特性</span></a> <a href="http://www.voidme.com/tag/注册中心" target="_blank" title="注册中心"> <span class="new-label">注册中心</span></a> </ul> </div> <div class="article_social"> <div class="article_like"> <div class="circle circle-like" id="my_zan" data_id="eEvIVb6"></div> </div> <div class="clear"></div> <div class="share"> <span class="share-left bdsharebuttonbox" data-tag="share_1"> <a href="#" class="bds_more icon-share" data-cmd="more"> <span class="bds_count" data-cmd="count" title="累计分享0次">0</span> </a> </span> <div class="share-right action action-share bdsharebuttonbox" data-tag="share_1"> <span class="bdshare"> <a href="#" class="bds_sinaweibo icon-weibo" data-cmd="tsina" title="分享到新浪微博">分享到微博</a> <a href="#" class="bds_weixin icon-wechat" data-cmd="weixin" title="分享到微信">分享到微信</a> <a href="#" class="bds_qq icon-qq" data-cmd="sqq" title="分享到QQ好友">分享到QQ</a> </span> </div> </div> <div class="clear"></div> <div class="bottom_plink huodong-detail-plink-banner clearfix"> </div> </div> <script> $(function () { $("#originfo").text("https://blog.csdn.net/dizaokui9121/article/details/101983138"); $("#originfo").hover(function () { $("#originfo").attr("href", "/link?url=https://blog.csdn.net/dizaokui9121/article/details/101983138"); }, function () { $("#originfo").attr("href", "javascript:void()"); }); }); </script> <script src="http://static2.javashuo.com/static/script/article.js?time=1735430479712" type="text/javascript"></script> </div> <div class="span3 article_right_side"> <div class="right_top"> <div id="right_site_articles" class="article_detail_bg"> <div class="article-part-title"> <span>每日一句</span> </div> <ul class="side_article_list"> 每一个你不满意的现在，都有一个你没有努力的曾经。 </ul> </div><script async src="https://pagead2.googlesyndication.com/pagead/js/adsbygoogle.js"></script>  <ins class="adsbygoogle" style="display:block" data-ad-client="ca-pub-6208739752673518" data-ad-slot="5830279121" data-ad-format="auto" data-full-width-responsive="true"></ins> <script> (adsbygoogle = window.adsbygoogle || []).push({}); </script> <div id="right_site_articles"> <div class="article-part-title"> <span>最新文章</span> </div> <ul class="side_article_list"> <li class="side_article_list_item">1. <a href="http://www.javashuo.com/article/p-xqgcpopz-xh.html" target="_blank" title="css 让chrome支持小于12px的文字"> css 让chrome支持小于12px的文字 </a> </li> <li class="side_article_list_item">2. <a href="http://www.javashuo.com/article/p-dmxpwqkh-xh.html" target="_blank" title="集合的一点小总结"> 集合的一点小总结 </a> </li> <li class="side_article_list_item">3. <a href="http://www.javashuo.com/article/p-obmvjmbx-xh.html" target="_blank" title="ejb"> ejb </a> </li> <li class="side_article_list_item">4. <a href="http://www.javashuo.com/article/p-umozhwfn-xh.html" target="_blank" title="Selenium WebDriver API"> Selenium WebDriver API </a> </li> <li class="side_article_list_item">5. <a href="http://www.javashuo.com/article/p-mjsvshlf-xh.html" target="_blank" title="人工智能基础，我的看法"> 人工智能基础，我的看法 </a> </li> <li class="side_article_list_item">6. <a href="http://www.javashuo.com/article/p-uoknizeq-xh.html" target="_blank" title="Non-local Neural及Self-attention"> Non-local Neural及Self-attention </a> </li> <li class="side_article_list_item">7. <a href="http://www.javashuo.com/article/p-amrpqjhz-xh.html" target="_blank" title="Hbuilder 打开iOS真机调试操作"> Hbuilder 打开iOS真机调试操作 </a> </li> <li class="side_article_list_item">8. <a href="http://www.javashuo.com/article/p-dofxfyww-xh.html" target="_blank" title="improved open set domain adaptation with backpropagation 学习笔记"> improved open set domain adaptation with backpropagation 学习笔记 </a> </li> <li class="side_article_list_item">9. <a href="http://www.javashuo.com/article/p-kopxrvsn-xh.html" target="_blank" title="Chrome插件 GitHub-Chart Commits3D直方图视图"> Chrome插件 GitHub-Chart Commits3D直方图视图 </a> </li> <li class="side_article_list_item">10. <a href="http://www.javashuo.com/article/p-wdxnmomp-xh.html" target="_blank" title="CISCO ASAv 9.15 - 体验思科上一代防火墙"> CISCO ASAv 9.15 - 体验思科上一代防火墙 </a> </li> </ul> </div> </div> <div class="operate_zone"> <div id="right_site_articles" class="article_detail_bg margin-top10"> <div class="article-part-title"> <span><a href="/contact" target="_blank">本站公众号</a></span> </div> <div class="side_article_list user-head"> <span style="color: #5ba607;font-size:14px;"> 欢迎关注本站公众号,获取更多信息</span><br/> <img src="http://open.weixin.qq.com/qr/code?username=develong"/> </div> </div> <div id="right_site_articles"> <div class="article-part-title"> <span>相关文章</span> </div> <ul class="side_article_list"> <li class="side_article_list_item">1. <a href="http://www.javashuo.com/article/p-crlkqtix-pr.html" target="_blank" title="CSS中的单冒号和双冒号（伪类及伪元素）"> CSS中的单冒号和双冒号（伪类及伪元素） </a> </li> <li class="side_article_list_item">2. <a href="http://www.javashuo.com/article/p-waclsowu-ds.html" target="_blank" title="css中的单冒号和双冒号"> css中的单冒号和双冒号 </a> </li> <li class="side_article_list_item">3. <a href="http://www.javashuo.com/article/p-dcsmvqyi-h.html" target="_blank" title="关于伪类与伪元素及其前面的冒号和两个冒号的使用"> 关于伪类与伪元素及其前面的冒号和两个冒号的使用 </a> </li> <li class="side_article_list_item">4. <a href="http://www.javashuo.com/article/p-uwgfjftw-db.html" target="_blank" title="CSS3:伪类前的冒号和两个冒号区别"> CSS3:伪类前的冒号和两个冒号区别 </a> </li> <li class="side_article_list_item">5. <a href="http://www.javashuo.com/article/p-fvmqmaah-rk.html" target="_blank" title="CSS伪类和伪元素"> CSS伪类和伪元素 </a> </li> <li class="side_article_list_item">6. <a href="http://www.javashuo.com/article/p-wbrfvoee-bg.html" target="_blank" title="伪类和伪元素"> 伪类和伪元素 </a> </li> <li class="side_article_list_item">7. <a href="http://www.javashuo.com/article/p-nufyzvnv-h.html" target="_blank" title="css伪类和伪元素"> css伪类和伪元素 </a> </li> <li class="side_article_list_item">8. <a href="http://www.javashuo.com/article/p-ptsvtish-bh.html" target="_blank" title="伪元素和伪类"> 伪元素和伪类 </a> </li> <li class="side_article_list_item">9. <a href="http://www.javashuo.com/article/p-dkigfuhy-br.html" target="_blank" title="css—伪类和伪元素"> css—伪类和伪元素 </a> </li> <li class="side_article_list_item">10. <a href="http://www.javashuo.com/article/p-hgmxfmul-bd.html" target="_blank" title="CSS中的伪类和伪元素"> CSS中的伪类和伪元素 </a> </li> </ul> <div style='padding-left:10px;font-size:14px;padding-bottom:10px;'> <a href='http://www.javashuo.com/relative/p-eabszieu-qy.html' target='_blank' title="css中的单冒号和双冒号以及伪类和伪元素的相关文章"> >>更多相关文章<< </a> </div> </div> </div> </div> </div> <script type="text/javascript"> $('table').each(function (i) { var size = $(this).children().size(); if (size > 1) { $(this).attr('class', "table table-bordered"); } else if (size == 1) { var e11 = $(this).children(":first"); var e1 = e11[0]; var name = e1.nodeName.toLowerCase(); if ("tbody" == name) { if (e1.children.length > 1) { $(this).attr('class', "table table-bordered"); } else if (e1.children.length == 1) { var e12 = e1.children[0]; var name2 = e12.nodeName.toLowerCase(); if ("tr" == name2) { if (e12.children.length > 1) { $(this).attr('class', "table table-bordered"); } } } } } }); window.page = 0; window.last = 0; window.first = true; resize_article_image('#nei', 550); + (function($){ window._bd_share_config = { common: { "bdText": "【" + $("title").text() + "】" + $(".post-content p:lt(2)").text(), "bdMini": "2", "bdMiniList": false, "bdPic": $(".post-content img:first") ? $(".post-content img:first").attr("src") : "", "bdStyle": "0", "bdSize": "24" }, share: [{ bdCustomStyle: 'http://static2.javashuo.com/static/css/share.css' }], }; with(document) 0[(getElementsByTagName("head")[0] || body).appendChild(createElement("script")).src = "http://bdimg.share.baidu.com/static/api/js/share.js?cdnversion=" + ~ ( - new Date() / 36e5)]; })(window.jQuery); </script> </div> <script type="text/javascript" src="http://static2.javashuo.com/static/plugin/highlight/highlight.pack.js"></script> <link href="http://static2.javashuo.com/static/plugin/highlight/styles/docco.css" media="screen" rel="stylesheet" type="text/css" /> <script type="text/javascript"> $('pre').each(function(i, e) { hljs.highlightBlock(e, "<span class='indent'> </span>", false) }); </script> <div class="footer"> <div class="footer-inner" style="padding-top: 50px;padding-bottom: 50px"> <a href="http://www.javashuo.com/contact" target="_blank">联系我们</a> <a href="http://www.javashuo.com/search">最近搜索</a> <a href="http://www.javashuo.com/recent">最新文章</a> <script type="text/javascript" src="https://v1.cnzz.com/z_stat.php?id=1279585947&web_id=1279585947"></script> <a href="https://beian.miit.gov.cn/" target="_blank">沪ICP备13005482号-10</a> <a href="http://www.voidme.com/mybatis" target="_blank">MyBatis教程</a> <a href="http://www.voidme.com/sql" target="_blank">SQL 教程</a> <a href="http://www.voidme.com/mysql" target="_blank">MySQL教程</a> <a href="http://www.voidme.com/java" target="_blank">Java 教程</a> <a href="http://www.voidme.com/thymeleaf" target="_blank">Thymeleaf 教程</a> <a href="http://www.voidme.com/hibernate" target="_blank">Hibernate教程</a> <a href="http://www.voidme.com/spring" target="_blank">Spring教程 </a> <a href="http://www.voidme.com/redis" target="_blank">Redis教程 </a> </div> <div style="display:none;"> <script> var _hmt = _hmt || []; (function() { var hm = document.createElement("script"); hm.src = "https://hm.baidu.com/hm.js?2936bf9a19a3d5abb5c9c726af070b7c"; var s = document.getElementsByTagName("script")[0]; s.parentNode.insertBefore(hm, s); })(); </script> </div> </div> <script type="text/javascript" src="http://static2.javashuo.com/static/script/tip.js?time=1735430479712" async></script> </body> </html>

css中的单冒号和双冒号 以及 伪类和伪元素

css中的单冒号和双冒号以及伪类和伪元素