一、基本选择器（标签、ID、类、通配符）
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>选择器</title>
<style>
/* 标签选择器 选中所有的p标签*/
p {
color: aqua;
}
/* id选择器 */
#box1 {
color: pink;
}
/* 类选择器 */
.box2 {
color: blueviolet;
}
/* 通配符选择器
*{
}
*/
</style>
</head>
<body>
<p>我是一段文字</p>
<div id="box1">我是盒子一</div>
<div class="box2">我是盒子2</div>
<div class="box2">我是盒子3</div>
<p>我是一段文字</p>
</body>
</html>
二、包含选择器（子代选择器，后代选择器）
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
<style>
/* 子代选择器 选中亲生儿子*/
.a>li {
background-color: pink;
}
/* 后代选择器 找到后代所有要找的元素*/
.a li {
color: blueviolet;
}
</style>
</head>
<body>
<ul class="a">
<li>1</li>
<li>1</li>
<li>1</li>
<li>1</li>
<ul>
<li>2</li>
<li>3</li>
<li>4</li>
<li>5</li>
</ul>
</ul>
</body>
</html>
三、复合选择器
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
<style>
/* div {
color: pink;
}
p {
color: pink;
}
span {
color: pink;
} */
div,
p,
span {
color: red;
}
</style>
</head>
<body>
<div>wisjiajsskmx</div>
<p>cndklcdsmc</p>
<span>jnckdsmc</span>
<ul>
<li>吃饱穿暖CNBCCDC</li>
</ul>
</body>
</html>
四、属性选择器
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
<style>
input {
background-color: pink;
}
input[type="password"] {
background-color: aquamarine;
}
div[id] {
width: 300px;
height: 300px;
background-color: blue;
}
/* type^="te"以te开头 */
input[type^="te"] {
background-color: red;
}
input[type$="l"] {
background-color: green;
}
/* type*="e" type值里边包含e */
input[type*="e"] {
background-color: chartreuse;
}
</style>
</head>
<body>
<input type="text"><br />
<input type="password"><br />
<input type="search"><br />
<input type="url"><br />
<input type="number"><br />
<div id="aquamarine">1</div>
<div>2</div>
</body>
</html>
五、伪元素选择器
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
<style>
ul li::before{
content: "~";
}
ul li::after{
content: "#";
}
input::placeholder{
color: tomato;
}
ul li:nth-child(4)::selection{
color: violet;
}
</style>
</head>
<body>
<ul>
<li>qweqwe</li>
<li>gdsgds</li>
<li>55757</li>
<li>22222</li>
<li>zxcvbnm</li>
</body>
</html>
六、结构伪类选择器
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
<style>
ul li:first-child{
background-color: pink;
}
ul li:nth-child(4){
background-color: violet;
}
</style>
</head>
<body>
<ul>
<li>1</li>
<li>2</li>
<li>3</li>
<li>4</li>
<li>5</li>
<li>6</li>
</u1>
</body>
</html>
七、伪类选择器
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
<style>
a:link{
color:pink
}
a:visited{
color:blueviolet
}
a:hover{
font-size: 40px;
}
a:active{
font-size: 70px;
}
</style>
</head>
<body>
<a href="#" >去百度</a>
</body>
</html>
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