CSS: pseudo-classes and pseudo-elements 1.Definition: pseudo-classes The pseudo-class concept is introduced to permit selection based on information that lies outside of the document tree or that cannot be expressed using the other simple selectors. In Chinese:引入伪类概念是为了允许基于文档树之外的...
CSS - The :lang Pseudo-class The :lang pseudo-class allows you to define special rules for different languages. In the example below, :lang defines the quotation marks for elements with lang="no": Example <!DOCTYPE html> q:lang(no) { quotes: "~" "~"; } Some text A quot...
CSS - The :lang Pseudo-class The:langpseudo-class allows you to define special rules for different languages. In the example below,:langdefines the quotation marks for elements with lang="no": Example q:lang(no) { quotes: "~" "~"; } Some text A quote in a paragraph Some ...
ega::after { … }, to set them apart from pseudo-classes. You may see this sometimes in CSS. CSS3 however also still allows for single colon pseudo-elements, for the sake of backwards compatibility, and we would advise that you stick with this syntax for the time being." ...
CSSPseudo-elements 伪元素是一个附加至选择器末的关键词,允许对被选择元素的特定部分修改样式。CSS伪元素是一种样式化文档元素的方法,这些元素没有由文档树中的位置明确定义。 一、什么是伪元素? CSS伪元素允许设置元素或元素部分的样式,而无需向其添加任何ID或类。当只想为段落的第一个字母设置样式以创建首字下...
The single-colon syntax was used for both pseudo-classes and pseudo-elements in CSS2 and CSS1. For backward compatibility, the single-colon syntax is acceptable for CSS2 and CSS1 pseudo-elements. The ::first-letter Pseudo-element The::first-letterpseudo-element is used to add a special styl...
CSS 2.1 Selectors, Pseudo-Classes, and Pseudo-Elements: Appendix C - CSS Cookbook, Third EditionChristopher Schmitt
cssCopy to Clipboard /* The first line of every element. */ p::first-line { color: blue; text-transform: uppercase; } Double colons (::) are used for pseudo-elements. This distinguishes pseudo-elements from pseudo-classes that use a single colon (:) in their notation. Note, browse...
Pseudo-class keywords are added to the selectors and preceded by a colon (:). Types of Pseudo-Classes There are the following types of pseudo-classes in CSS: Structural pseudo-class: Selects elements based on their position in document such as:first-child,:last-child, etc. ...
CSS Pseudo-elements 伪元素是一个附加至选择器末的关键词,允许对被选择元素的特定部分修改样式。CSS伪元素是一种样式化文档元素的方法,这些元素没有由文档树中的位置明确定义。 CSS Pseudo-elements 伪元素是一个附加至选择器末的关键词,允许对被选择元素的特定部分修改样式。CSS伪元素是一种样式化文档元素的方法,...