pseudo-elements Pseudo-elements create abstractions about the document tree beyond those specified by the document language. In Chinese:伪元素在文档语言指定的树之外创建关于文档树的抽象。 2.Grammer(CSS3): pseudo-classes:begin with " :: " pseudo-elements:begin with " : " 3.The list of pseudo-...
The double colon replaced the single-colon notation for pseudo-elements in CSS3. This was an attempt from W3C to distinguish betweenpseudo-classesandpseudo-elements. The single-colon syntax was used for both pseudo-classes and pseudo-elements in CSS2 and CSS1. For backward compatibility, the si...
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...
CSS进阶篇——伪元素 (pseudo elements) 伪元素(pseudo elements)和伪类(pseudo classes)非常相像,都是依附在选择器上使用 selector:pseudoelement { property: value; }。 首字母 & 首行 first-letter 作用于盒模型元素的第一个字母,first-line 作用于最顶部的...
CSS 伪元素 (Pseudo-elements)CSS 伪元素用于向某些选择器设置特殊效果。语法 伪元素的语法: selector:pseudo-element {property:value;} CSS 类也可以与伪元素配合使用: selector.class:pseudo-element {property:value;}:first-line 伪元素 "first-line" 伪元素用于向文本的首行设置特殊样式。 在下面的例子中,...
CSS Pseudo-elementsThe CSS pseudo-elements is a ways to style elements of the document that weren't explicitly defined by a position in the document tree.What is Pseudo-elementThe CSS pseudo-elements allow you to style the elements or parts of the elements without adding any IDs or classes ...
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。 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...
The double colon replaced the single-colon notation for pseudo-elements in CSS3. This was an attempt from W3C to distinguish betweenpseudo-classesandpseudo-elements. The single-colon syntax was used for both pseudo-classes and pseudo-elements in CSS2 and CSS1. ...
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,...
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...