p:first-child匹配的是某父元素的第一个子元素,可以说是结构上的第一个子元素。(注意和:first-of-type做区分) :first-of-type p:first-of-type匹配的是该类型的第一个,类型是指什么呢,就是冒号前面匹配到的东西,比如 p:first-of-type,就是指所有p元素中的第一个。这里不再限制是第一个子元素了,只要...
SelectorExampleExample description elementpSelects all <p> elements #id#firstnameSelects the element with id="firstname" **Selects all elements .class.intro p.introSelects all elements with class="intro" Selects all <p> elements with class="intro" ...
Multi-element selector This library also allows you to create selector targeting multiple elements at once. You do that by calling the same function, but you provide an array of elements instead of single element: <body><!-- firstElement --><divclass="aaa bbb"></div><!-- secondElement...
类选择器(Class Selector) 通过HTML元素的 class 属性来选取元素。 当使用类选择器时,您可以通过为HTML元素添加class属性来选择并应用样式。让我们通过一个实际的例子来说明: 假设我们有以下HTML代码,表示一个产品列表,每个产品都有标题和描述: <div class="product"> <h2 class="product-title">Product A</h2>...
scopes– groups of classes which never used with classes from other groups on the same element All sections are optional. Value oftags,idsandclassesshould be an array of a string, value ofscopesshould be an array of arrays of strings. Other values are ignoring. ...
The CSS rule below will be applied to the HTML element with id="para1": #para1{ text-align:center; color:red; } Try it Yourself » Note:An id name cannot start with a number! The CSS class Selector The class selector selects HTML elements with a specific class attribute. ...
functionescapeSelector(myid){ return"#"+ myid.replace(/(\/|:|\.|\[|\]|,|=|@)/g,"\\$1"); } The function can be used like so: 1 $( escapeSelector("some.id") ) How do I determine the state of a toggled element?
5.11 Pseudo-classes伪类5.11.1:first-child pseudo-class :first-child伪类The :first-child pseudo-class matches an element that is the first child element of some other element. :first-child伪类匹配某个元素的第一个子元素。 Example(s): In the following example, the selector matches any P ...
Only one pseudo-element may appear per selector, and if present it must appear after the sequence of simple selectors that represents the subjects of the selector. Note: A future version of this specification may allow multiple pseudo-elements per selector. ...
CSS loader with borders CodePen Embed Fallback Author: Jesgrapa This is a CSS loader with borders made without JavaScript. Single Element Rainbow Pen Loader CodePen Embed Fallback Author: Dario Corsi This is a nice HTML & CSS option for web browsers. The div class code creates a varicolored...