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 in reverse by setting the value of animation-direction to alternate.
CSS3 animation-direction property
Function:Defines whether it should take turns Play animation in reverse.
Syntax:
animation-direction: normal|alternate;
normal: Default value. The animation should play normally.
alternate: The animation should be played in reverse in turn.
Note: If the animation-direction value is "alternate", the animation will play normally in odd numbers (1, 3, 5, etc.), and in even numbers (2, 4, etc.) , 6, etc.) plays backward.
Note: If the animation is set to play only once, this attribute has no effect.
CSS3 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>
<div></div>
</body>
</html>Rendering:
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