css关系选择符
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 | <! Doctype html> < html > < head > < meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> < title >testcss3</ title > < script type="text/javascript" > </ script > < style > div{ text-align: center; border: 2px solid #a1a1a1; padding: 10px 40px; background: #dddddd; width: 350px; border-radius: 25px; box-shadow: 10px 10px 5px #dddddd; } /* 相邻兄弟选择器 h1和p相邻 的p*/ .div2 h1 + p{background-color: aqua;} /* 子元素选择器*/ h1 > strong {color: red;} /* 伪类*/ a:link {color: #FF0000} /* 未访问的链接 up*/ a:visited {color: #00FF00} /* 已访问的链接 */ a:hover {color: #FF00FF} /* 鼠标移动到链接上 over*/ a:active {color: #0000FF} /* 选定的链接 down */ .div3 p:first-child{font-weight: bold;} .div3 li:first-child{text-transform:uppercase;} .div4 p:first-child i{color: blue;} .div2 h1:before{content: "hello";}</ style > </ head > < body > < div >border-radius 属性允许您向元素添加圆角</ div > < div class="div2"> < h1 >This is a heading.</ h1 > < p >This is paragraph.</ p > < p >This is paragraph.</ p > < p >This is paragraph.</ p > < p >This is paragraph.</ p > < p >This is paragraph.</ p > </ div > < h1 >This is < strong >very</ strong > < strong >very</ strong > important.</ h1 > < h1 >This is < em >really < strong >very</ strong ></ em > important.</ h1 > < div class="div3"> < p >These are the necessary steps:</ p > < ul > < li >Intert Key</ li > < li >Turn key < strong >clockwise</ strong ></ li > < li >Push accelerator</ li > </ ul > < p >Do < em >not</ em > push the brake at the same time as the accelerator.</ p > </ div > < div class="div4"> < p >some < i >text</ i >. some < i >text</ i >.</ p > < p >some < i >text</ i >. some < i >text</ i >.</ p > </ div > </ body > </ html > |
http://www.w3school.com.cn/css/css_selector_child.asp
.reveal *{display: none;}
/*reveal 的子元素都不显示 没有*的话就是本身加子元素都不显示*/
.reveal *.handle{display: block;}
/*除了class="handle"的元素*/
css 关系选择符:
1:包含选择符 E F(sRules)
2:子选择符 E>F(sRules)
3.相邻选择符(E+F)
4.兄弟选择符(E~F)
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