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滚动页面,然后再执行CSS3 动画

2014-12-28 10:55 225 查看
<!doctype html>
<html>
<head>
<meta charset="utf-8">
<title>动态CSS3动画</title>
<style>
* {margin:0; border:0; padding:0;}
body {width:100%; height:2000px;}
#div1 {width:100px; height:100px; background-color:#000; position:relative;}

.ani {animation:myfirst 2s linear forwards; -webkit-animation:myfirst 2s linear forwards;}

@keyframes myfirst {from {left:0; top:0} to {left:400px; top:400px;}}
@-webkit-keyframes myfirst {from {left:0; top:0} to {left:400px; top:400px;}}
</style>

<script>
window.onload = function (){<span style="white-space:pre">	</span> 
<span style="white-space:pre">	</span>window.onscroll = function (){
<span style="white-space:pre">		</span>//两种方法:1、通过style.cssText写入样式;2、通过className添加类。
<span style="white-space:pre">		</span>//document.getElementById("div1").style.cssText = "animation:myfirst 2s linear forwards; -webkit-animation:myfirst 2s linear forwards";
<span style="white-space:pre">		</span>document.getElementById("div1").className = "ani";
<span style="white-space:pre">	</span>}
}
</script>
</head>

<body>
<div id="div1"></div>
<script>
</script>
</body>
</html>
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标签:  css3 animation HTML5