本文介绍了不应用CSS样式,除非我指定了精确的选择器的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧! 问题描述 我有这种情况我认为很奇怪,其中 a:hover { color: FD5454; } 无效,但 #feed h3 a:hover { color:#FD5454; } 它已经有一段时间,因为我使用CSS广泛,所以我不知道为什么。有人可以解释这个给我吗?这肯定是一个愚蠢的问题,但我只是不能自己弄清楚。提前感谢! 编辑:以下是影响此刻的代码: < div id =feed> < h2>在Instagram上关注我们< / h2> < h3>< a href =http://www.instagram.com/johndoe> @ johndoe< / a>< / h3> < / div> 以下是完整的样式规则: a:link { text-decoration:none; color:white; } #feed { text-align:center; background:url(../ img / Feed_bg.jpg)center no-repeat; height:100vh; } #feed h2 { color:#789199; padding-top:5vh; } #feed h3 a { text-decoration:none; font-family:Lato Light; color:white; } / *这是工作* / #feed h3 a:hover { color:#FD5454; } / *这不是* / a:hover { color:#FD5454; } 解决方案 a href =https://developer.mozilla.org/en-US/docs/Web/CSS/Specificity> CSS特性。这里, a:hover 选择器不够具体,不能覆盖 #feed h3 a 规则。作为MDN的注释:正如您所发现的,在悬停选择器前添加 #feed ( #feed a:hover )增加了覆盖其他选择器的特异性。 jsFiddle示例 有很多 CSS特异性计算器,您可以看到 a:hover 特异性 0011 ,而 #feed a:hover 有 0111 。 I've got this situation I think is weird, where a:hover { color: #FD5454;}doesn't work, but#feed h3 a:hover { color: #FD5454;}does. It has been some time since I used CSS extensively, so I have no idea why. Could someone please explain this to me? It surely must be a stupid question, but I just couldn't figure it out myself. Thank you in advance!EDIT:Here's the code it is affecting at the moment:<div id="feed"> <h2>Follow us on instagram</h2> <h3><a href="http://www.instagram.com/johndoe">@johndoe</a></h3></div>And here are the complete style rules:a:link { text-decoration: none; color: white;}#feed { text-align: center; background: url("../img/Feed_bg.jpg") center no-repeat; height: 100vh;}#feed h2 { color: #789199; padding-top: 5vh;}#feed h3 a { text-decoration: none; font-family: "Lato Light"; color: white;}/* This is working */#feed h3 a:hover { color: #FD5454;}/* This is not */a:hover { color: #FD5454;} 解决方案 This is a case of CSS specificity. Here, your a:hover selector isn't specific enough to override the #feed h3 a rule. As MDN notes:And as you discovered, by adding #feed in front of your hover selector (#feed a:hover) increases the specificity to override the other selector.jsFiddle exampleThere are many CSS specificity calculators available online and you can see that a:hover has a specificity of 0011, while #feed a:hover has 0111. 这篇关于不应用CSS样式,除非我指定了精确的选择器的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持! 10-21 11:26