important(infinite)>id(1000)>class(100)>伪类选择器(:first-of-type)>伪元素选择器(::after)元素选择器(div) 如果优先级相同,选择最后出现的样式 3. css3新增伪类 p:first-of-type 选择属于父元素的首个p元素 p:last-of-type 选择属于父元素的最后一个p元素 p:only-of-type 选择属于父元素的唯一p元素...
CSS:last-of-type伪类选择器用于匹配属于其父元素的特定类型的最后一个子元素的每个元素。 换句话来说,:last-of-type伪类选择器匹配父元素中最后一次出现的某类子元素,例如: <article> <h1>标题</h1> <p> 第一个段落... </p> <p> 第二个段落... </p> </article> 如果使用下面的CSS规则来添加样式...
initial-scale=1.0"/><title>清明节祭祖</title><style type="text/css">body{font-family:Arial;}.container{padding:20px;background-color:white;margin:100px auto;border:1px solid black;border-radius:4px;box-shadow:0px 10px 5pxrgba(0,0,0,0.2);}table{width:100%;...
:nth-child() :nth-last-child() :only-child :last-child :nth-of-type() :only-of-type() :empty :target 这个伪类允许我们选择基于URL的元素,如果这个元素有一个识别器(比如跟着一个#),那么:target会对使用这个ID识别器的元素增加样式。 :enabled :disabled :checked :not...
The difference is the proliferation of HTML5 polyfills in the last year. What Makes a Polyfill? For a concrete example of what I’m talking about, take a look at json2.js. Specifically, here is the first line of code in its JSON.parse implementation: JavaScript Copy if (typeof JSON....
even if you don’t plan to add support for older browsers. If you do want to “polyfill” placeholder support, Modernizr can help. As I mentioned in my last article, the good folks at Modernizr try to keep a running list of every polyfill and fallback you could possibly want for a gi...
Last modified: 22 November 2024 WebStorm brings powerful support for HTML that includes syntax and error highlighting, formatting according to the code style, structure validation, code completion, on-the-fly preview during a debugging session (Live Edit) or in the dedicated preview tab in the ...
Last modified: 22 November 2024 WebStorm brings powerful support for HTML that includes syntax and error highlighting, formatting according to the code style, structure validation, code completion, on-the-fly preview during a debugging session (Live Edit) or in the dedicated preview tab in the ...
.app>div { display: none; } .app>*:last-child { display: block; } 第一个选择器隐藏 div 标记与应用程序的类,而第二个选择器,具有更高的优先级,确保显示的最后一个子级的所有即时的儿童。 这些位置中的 CSS 规则,Twitter 搜索应用程序是完全功能和通航。 管理Back 堆栈 与当前 ...