英[d??rek?n ] 美[d??r?k??n, da?n-]
n. ?? ??plural: ??
CSS3 ????? ?? ?? ???
??: ?????? ???? ???? ??? ?????.
??: ??animation-direction: Normal|alternate;
??: normal ??????. ?????? ????? ????? ???. ?? ?????? ????? ???? ???.?
??: ?????? ? ?? ????? ??? ?? ? ??? ??? ????.
?????? ? ? ?? ???? ?? ????? ??? ?? ??? ???? ?????? ????? ????? ? ? ????. ????? ? ??? ?? Normal???. ?? ?????? ????? ????? ?????
CSS3 ????? ?? ?? ?
<!DOCTYPE html>
<html>
<head>
<style>
div
{
width:100px;
height:100px;
background:red;
position:relative;
animation:myfirst 5s infinite;
animation-direction:alternate;
/* Safari and Chrome */
-webkit-animation:myfirst 5s infinite;
-webkit-animation-direction:alternate;
}
@keyframes myfirst
{
0% {background:red; left:0px; top:0px;}
25% {background:yellow; left:200px; top:0px;}
50% {background:blue; left:200px; top:200px;}
75% {background:green; left:0px; top:200px;}
100% {background:red; left:0px; top:0px;}
}
@-webkit-keyframes myfirst /* Safari and Chrome */
{
0% {background:red; left:0px; top:0px;}
25% {background:yellow; left:200px; top:0px;}
50% {background:blue; left:200px; top:200px;}
75% {background:green; left:0px; top:200px;}
100% {background:red; left:0px; top:0px;}
}
</style>
</head>
<body>
<p><strong>注釋?zhuān)?lt;/strong>Internet Explorer 9 以及更早的版本不支持 animation-direction 屬性。</p>
<div></div>
</body>
</html>???? ?? ?
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