HTML
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>笔下光年</title>
</head>
<body>
<p>逐步改变 background-size 属性，从 "10px 10px" 到 "125px 125px",然后回到 "10px 10px":<p>
<div id="myDIV"></div>
<p>background-size 属性支持动画效果。</p>
<p><b>注意：</b>Internet Explorer 9 及更早 IE 版本不支持 CSS 动画。</p>
</body>
</html>
CSS
#myDIV {
width: 300px;
height: 200px;
border: 1px solid black;
background-image: url('http://example.itshubao.com/index/images/logo.png');
background-size: 20px 20px;
-webkit-animation: mymove 5s infinite; /* Chrome, Safari, Opera */
animation: mymove 5s infinite;
}
/* Chrome, Safari, Opera */
@-webkit-keyframes mymove {
50% {background-size: 125px 125px;}
}
/* Standard syntax */
@keyframes mymove {
50% {background-size: 125px 125px;}
}