1.css3属性选择器
<!DOCTYPE html>
<html lang="en"><head>
<meta charset="UTF-8">
<title>css3属性选择器</title>
<style type="text/css">
/* id包含div字符串*/ [id*=div] {
color: lime;
}
/*开始字符串为div*/ [id^=div] {
color: red;
}
/*结束字符串为div*/ [id$=div] {
color: blue;
}
</style>
</head><body>
<div>
<div id="div1">11</div>
<div id="2div2">22</div>
<div id="3div3">33</div>
<div id="44div">44</div>
<div id="wowo">55</div>
</div>
</body></html>
2.css3结构伪类选择器
<!DOCTYPE html>
<html lang="en"><head>
<meta charset="UTF-8">
<title>css3结构伪类选择器</title>
<style type="text/css">
/* 第一行*/ body>p:first-line {
color: aqua;
}
/* 首字母*/ body>p:first-letter {
color: red;
}
/*元素前插入内容*/ li:before {
content: "--";
color: yellow;
}
/*元素后插入内容*/ li:after {
content: "++";
color: green;
}
/*根元素*/ :root {
background: darkgrey;
}
/*排除*/ div *:not(h1) {
background: green;
}
/*为空*/ .bb li:empty {
background: green;
}
/*业内跳转目标*/ :target {
background: orange;
}
</style>
</head><body>
<p>
我是第一行
<br> 我是第二行
</p>
<ul>
<li class="aa">1</li>
<li>2</li>
<li class="aa">3</li>
<li class="aa">4</li>
</ul>
<ul class="bb">
<li>1</li>
<li></li>
<li>3</li>
<li></li>
<li>5</li>
<li></li>
</ul>
<div>
<h1>111</h1>
<h2>222</h2>
<h3>333</h3>
</div>
<a href="#a1" rel="external nofollow" >111</a>
<a href="#a2" rel="external nofollow" >222</a>
<a href="#a3" rel="external nofollow" >333</a>
<div id="a1">a1</div>
<div id="a2">a2</div>
<div id="a3">a3</div>
</body></html>
3.css3选择器
<!DOCTYPE html>
<html lang="en"><head>
<meta charset="UTF-8">
<title>css3选择器</title>
<style type="text/css">
/*第一个元素*/ li:first-child {
background-color: yellow;
}
/*最后一个元素*/ li:last-child {
background-color: blue;
}
/*上到下第几个*/ li:nth-child(2) {
background-color: #666;
}
/*下到上第几个*/ li:nth-last-child(2) {
background-color: #888;
}
/*基数*/ li:nth-child(odd) {
color: red;
}
/*偶数*/ li:nth-child(even) {
color: #999;
}
/*只算同类元素*/ .aa h3:nth-of-type(2),
.aa h4:nth-of-type(2) {
color: red;
}
/*样式循环*/ .bb li:nth-child(4n+1) {
background-color: #111;
} .bb li:nth-child(4n+2) {
background-color: #222;
} .bb li:nth-child(4n+3) {
background-color: #333;
} .bb li:nth-child(4n) {
background-color: #444;
}
/*只有一个元素*/ li:only-child {
background-color: green;
}
</style>
</head><body>
<ul>
<li>11</li>
<li>22</li>
<li>33</li>
<li>44</li>
<li>55</li>
<li>66</li>
<li>77</li>
<li>88</li>
</ul>
<div class="aa">
<h3>111</h3>
<h4>222</h4>
<h3>111</h3>
<h4>222</h4>
<h3>111</h3>
<h4>222</h4>
<h3>111</h3>
<h4>222</h4>
<h3>111</h3>
<h4>222</h4>
</div>
<div class="bb">
<ul>
<li>11</li>
<li>22</li>
<li>33</li>
<li>44</li>
<li>11</li>
<li>22</li>
<li>33</li>
<li>44</li>
<li>11</li>
<li>22</li>
<li>33</li>
<li>44</li>
<li>11</li>
<li>22</li>
<li>33</li>
<li>44</li>
</ul>
</div>
<ul>
<li>11</li>
</ul>
</body></html>
4.UI元素状态伪类选择器
<!DOCTYPE html>
<html lang="en"><head>
<meta charset="UTF-8">
<title>UI元素状态伪类选择器</title>
<style type="text/css">
/*hover鼠标在控件上*/ input[type="text"]:hover {
background-color: darkviolet;
}
/*focus获取焦点*/ input[type="text"]:focus {
background-color: aqua;
}
/*active鼠标按住*/ input[type="text"]:active {
background-color: #666;
}
/*checked已选择状态*/ input[type="checkbox"]:checked {
outline: 2px solid gold;
}
/*enabled可用*/ .aa input[type="text"]:enabled {
background: yellow;
}
/*disabled不可用*/ .aa input[type="text"]:disabled {
background: red;
cursor: pointer;
}
</style>
</head><body>
<input type="text" name="name">
<input type="text" name="age">
<input type="checkbox">111
<input type="checkbox">222
<input type="checkbox">333
<div class="aa">
<input type="text" name="name" id="t1">
<input type="text" name="age" id="t2" disabled>
</div>
</body></html>
5.通用兄弟选择器
<!DOCTYPE html>
<html lang="en"><head>
<meta charset="UTF-8">
<title>通用兄弟选择器</title>
<style type="text/css">
/*跟在div后面的p元素*/
div~p {
background: gold;
} </style>
</head><body>
<div>
<div>
<p>div的子元素p</p>
<p>div的子元素p</p>
</div>
<p>div相邻元素p</p>
<p>div相邻元素p</p>
<h4>----------</h4>
<div>
<p>div的子元素p</p>
</div>
<p>div相邻元素p</p>
<p>div相邻元素p</p>
</div>
<p>div相邻元素p</p>
<p>div相邻元素p</p>
</body></html>
