英[d??rek?n ] 美[d??r?k??n, da?n-]
n. ?? ??plural: ??
CSS ????? ?? ?? ???
????? ?? ??? ??? ??????
animation-direction ??? ?????? ??? ????? ???? ??? ???? ? ?????. ?????? ? ? ?? ???? ?? animation-direction ?? ??? ???? ??? ?????? ??? ? ????.
??: ?????? ???? ???? ??? ?????.
??: ??animation-direction: Normal|alternate;
??: normal ??????. ?????? ????? ????? ???. ?? ?????? ????? ???? ???.?
??: ?????? ? ?? ????? ??? ?? ? ??? ??? ????.
CSS ????? ?? ?? ?
<!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:</strong>Internet Explorer 9 以及更早的版本不支持 animation-direction 屬性。</p> <div></div> </body> </html>
???? ?? ?
??? ????? ??? "???? ??" ??? ?????