精灵图
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>精灵图案例</title>
<style>
/*精灵图就是操作大图在显示区域的位置*/
.box {
500px;
height: 100px;
background-color: orangered;
border: solid;
}
.box {
background-image: url("img/bg.png");
background-position-y: -150px;
}
.box:hover {
cursor: pointer;
background-position-y: -250px;
}
</style>
<style>
.b1 {
155px;
height: 48px;
border: solid;
background-image: url("img/bg.png");
}
.b1:hover {
cursor: pointer;
background-position-y: -48px;
}
</style>
<style>
.b2 {
157px;
height: 48px;
border: solid;
background-image: url("img/bg.png");
background-position: -155px 0;
}
.b2:hover {
cursor: pointer;
background-position: -155px -48px;
}
</style>
</head>
<body>
<div class="box"></div>
<div class="b1"></div>
<div class="b2"></div>
</body>
</html>