trycss_anim_background-position 在线代码实例

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<!DOCTYPE html>
<html>
<head>
<style> 
#myDIV {
    width: 300px;
    height: 200px;
    border: 1px solid black;
    background-image: url('/statics/images/course/smiley.gif');
    background-position: top left;
    -webkit-animation: mymove 5s infinite; /* Chrome, Safari, Opera */
    animation: mymove 5s infinite;
}
/* Chrome, Safari, Opera */
@-webkit-keyframes mymove {
    50% {background-position: center;}
}
/* Standard syntax */
@keyframes mymove {
    50% {background-position: center;}
}
</style>
</head>
<body>
<p>逐步改变 background-position 属性，从 "top left" 到 "center",然后回到 "top left":<p>
<div id="myDIV"></div>
<p>background-position 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>
 
 
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