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HomeWeb Front-endHTML TutorialCSS选择器总结 - Jesse131

选择器                优先级                 实例
ID选择器           100
类选择器            10
伪类选择器     10                    :link :visited :focus :hover :actived :lang
  UI元素状态伪类          E:enabled{}匹配所有用户界面(form表单)中处于可用状态的E元素
                  E:disabled{}匹配所有用户界面(form表单)中处于不可用状态的E元素
                  E:checked{}匹配所有用户界面(form表单)中处于选中状态的E元素
  结构性伪类             E:first-child{}匹配父元素中第一个E元素
                  E:last-child{}匹配父元素中最后一个E元素
                  E:nth-child(n){}匹配第n个子元素E
                  E:nth-last-child(n){}匹配倒数第n个结构子元素E
                  E:nth-of-type(n){}匹配同类型中的第n个同级兄弟元素E
                  E:nth-last-of-type(n){}匹配同类型中的倒数第n个同级兄弟元素E
                  E:first-of-type{}匹配同级兄弟元素中的第一个E元素
                  E:only-child{}匹配属于父元素中唯一子元素的E
                  E:only-of-type{}匹配属于同类型中唯一兄弟元素的E
                  E:root{} 不常用 匹配文档的根元素。在HTML中,根元素永远是HTML
                  E:empty{} 不常用 匹配没有任何子元素(包括text节点)的元素E
  否定伪类              p:not(s){}匹配所有不匹配简单选择符s的元素p
  目标伪类              不常用
属性选择器          10
  简单属性选择器           h1[foo]{color:red;}
  具体属性值选择器        h1[foo="sun"]{color:red;} 选择foo属性值是sun的所有h1元素
  子串匹配属性选择器       h1[foo*="sun"]{color:red;} 选择foo属性值中包含sun的所有h1元素
                  h1[foo^="sun"]{color:red;} 选择foo属性值以sun开头的所有h1元素
                  h1[foo$="sun"]{color:red;} 选择foo属性值以sun结尾的所有h1元素
元素选择器      1
  子元素选择器           h1 > span{color:red;}
  相邻兄弟元素选择器        h1 + h1{font-size:20px;}
伪元素选择器      1       p::first-letter{}设置段落p的首字母样式
                   p::first-line{} 设置段落p的首行样式
                   p::before{} p::after{}
                   p::selection{}设置被用户选取部分的样式

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