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This is an experimental feature
Because this feature is still in development in some browsers, check the compatibility table for the proper prefixes to use in various browsers. Also note that the syntax and behavior of an experimental feature is subject to change in future version of browsers as the spec changes.


The animation-direction CSS property indicates whether the animation should play in reverse on alternate cycles.

It is often convenient to use the shorthand property animation to set all animation properties at once.


animation-direction: normal | alternate [, normal | alternate]*


The animation should play forward each cycle. In other words, each time the animation cycles, the animation will reset to the beginning state and start over again. This is the default animation direction setting.
The animation should reverse direction each cycle. When playing in reverse, the animation steps are performed backward. In addition, timing functions are also reversed; for example, an ease-in animation is replaced with an ease-out animation when played in reverse.
The animation plays backward each cycle. Each tome the animation cycles, the animation resets to the end state and start over again.
The animation plays backward on the first play-through, then forward on the next, then continues to alternate.


See CSS animations for examples.


Specification Status Comment
CSS Animations Level 3 Working Draft For the two new values, see the W3C discussion.

Browser compatibility

  • Desktop
  • Mobile

Feature Chrome Firefox (Gecko) Internet Explorer Opera Safari (WebKit)
Basic support (Yes) -webkit 5.0 (5.0) -moz 10 -ms [1] 12 -o 4.0 -webkit
reverse 19 -webkit[2] -- -- -- --
alternate-reverse 19 -webkit[3] -- -- -- --
Feature Android Chrome for Android Firefox Mobile (Gecko) IE Phone Opera Mobile Safari Mobile
Basic support ? ? ? ? ? ?

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