CSS Property: animation-direction
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The CSS (CSS3) animation-direction property defines
whether an animation should play in forward, reverse or alternating directions.
Valid property values
(other than inherit
and initial) are:
|
Value
|
Description
|
|
alternate
|
Will play in forward
direction every odd time and reverse direction every even time
|
|
alternate-reverse
|
Will play in reverse
direction every odd time and forward direction every even time
|
|
normal
|
(default value). Will
play in forward direction
|
|
reverse
|
Will play in reverse
direction
|
|
Default Value:
|
normal
|
|
JavaScript syntax:
|
e.g. object.style.animationDirection = "reverse"
|
|
Inherited:
|
No
|
|
Animatable:
|
No
|
EXAMPLE:
HTML USED IN THIS EXAMPLE:
<!DOCTYPE html>
<html> <!-- Copyright (c) Nematrian Limited 2018 -->
<head>
<style>
div {width: 100px; height: 40px; position: relative;
background: yellow; animation: anim 2s infinite;}
div.x1 {animation-direction: alternate;}
@keyframes anim {from {left: 0px} to {left: 50px;} }
</style>
</head>
<body>
1. Element set using in-file HTML style<br>
<div class="x1"> </div><br><br>
2. Element set using JavaScript<br>
<div id="x2"> </div>
<script>
document.getElementById("x2").style.animationDirection = "alternate";
</script>
</body>
</html>
|
FUNCTION THAT MAY ASSIST IN TESTING WHETHER FEATURE IS SUPPORTED:
function isSupportedCSSPropertyAnimationDirection() {
var x = document.createElement("DIV"); x.style.animationDirection = "alternate"; return (window.getComputedStyle(x, null).animationDirection == "alternate");
} |
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