hover
是用来美化鼠标悬停的效果的,当鼠标停放在某个区域,就会执行对应的hover
操作。可以操作本标签的内容,也可以操作本标签下某一个标签的内容
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>demo1</title>
<style>
.name1:after{
content: "潘达";
}
</style>
</head>
<body>
<div class="name1">panda</div>
<div class="name1">Hello</div>
</body>
</html>
after
是用来在某个标签的最后添加某些东西:
fixed(固定在窗口的某个位置)
案例:
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>demo1</title>
<style>
.back{
position: fixed;
height: 60px;
width: 60px;
border: 3px solid orange;
bottom: 40px;/*距离底部40px*/
right: 0;/*距离右部40px*/
}
</style>
</head>
<body>
<div class="back">panda</div>
</body>
</html>
relative和absolute
一个标签相对于另一个标签的位置
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>demo1</title>
<style>
.name1{
position: relative;
height: 300px;
width: 600px;
border: 3px solid orange;
top: 40px;
left: 50px;
}
.name1 .name2{
position: absolute;
height: 30px;
width: 60px;
border: 3px solid blue;
top: 40px;
left: 50px;
}
</style>
</head>
<body>
<div class="name1">
<div class="name2"></div>
</div>
</body>
</html>
效果:
border
是上下左右都加边框,board-left
是左边框,board-right
是右边框以此类推
transparent
是透明色