This is an experimental technology
Because this technology's specification has not stabilized, check the compatibility table for usage in various browsers. Also note that the syntax and behavior of an experimental technology is subject to change in future versions of browsers as the specification changes.
The direction
property of the AnimationEffectTimingReadOnly
dictionary object represents the direction of the animation's playback along its timeline and its behavior after completing each iteration.
Note: In AnimationEffectTiming
, a mutable subclass of AnimationEffectTimingReadOnly
used withKeyframeEffects
, the property acts as both a getter and a setter.
Syntax
// Getting the direction of the animation var animationPlaybackDirection = animation.effect.timing.direction; // Setting the direction of the animation animation.effect.timing.direction = reverse;
Value
A DOMString
representing the direction of the animation's playback. It can take one of the following values (defaults to normal
):
- normal
- The animation runs forwards, from beginning to end, in the way we experience the flow of time.
- reverse
- The animation runs backwards, or "rewinds."
- alternate
- The animation switches direction after each iteration, going from forwards to backwards then back again every two iterations.
- alternate-reverse
- The reverse of the above: the animation switches direction after each iteration, going from backwards to forwards then back again every two iterations.
Examples
In the Red Queen's Race example, we can inspect the Red Queen and Alice's animation to discover a production secret:
// Returns "reverse" because the sprite was created upside down!
return redQueen_alice.effect.timing.direction;
Specifications
Specification | Status | Comment |
---|---|---|
Web Animations The definition of 'AnimationEffectTimingReadOnly.direction' in that specification. |
Working Draft | Editor's draft. |
Browser compatibility
Feature | Chrome | Firefox (Gecko) | Internet Explorer | Opera | Safari (WebKit) |
---|---|---|---|---|---|
Basic support | (Yes) | 48 (48) | No support | (Yes) | No support |
Feature | Android | Android Webview | Chrome for Android | Firefox Mobile (Gecko) | Firefox OS | IE Mobile | Opera Mobile | Safari Mobile |
---|---|---|---|---|---|---|---|---|
Basic support | ? | ? | ? | ? | ? | No support | No support | No support |
See also
- Web Animations API
AnimationEffectReadOnly.timing
returns aAnimationEffectTimingReadOnly
object...- ...while
AnimationEffect.timing
returns a mutableAnimationEffectTiming
object. - CSS's
animation-direction