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css The animation-direction property is used to define whether the animation should be played in reverse in turn; when the animation is played more than once, we can realize the animation in reverse by setting the value of animation-direction to alternate.
How to use the css animation-direction property?
The animation-direction attribute is used to define whether the animation should be played in reverse in turn; when the animation is played more than once, we can realize the animation turn by setting the value of animation-direction to alternate. Play in reverse.
Function: Define whether the animation should be played in reverse in turn.
Syntax:
animation-direction: normal|alternate;
Description: normal Default value. The animation should play normally. alternate The animation should take turns in reverse.
Note: If the animation is set to play only once, this attribute has no effect.
css animation-direction property usage example
<!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>注释:</strong>Internet Explorer 9 以及更早的版本不支持 animation-direction 属性。</p> <div></div> </body> </html>
Effect output:
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