AnimationEffectTiming

The AnimationEffectTiming interface of the Web Animations API is comprised of timing properties. It is returned by the timing attribute of a KeyframeEffect.

Properties

This interface inherits its properties from its parent, AnimationEffectTimingReadOnly, in a non-read only form.

AnimationEffectTimingReadOnly.delay

The number of milliseconds to delay the start of the animation. Defaults to 0.

AnimationEffectTimingReadOnly.endDelay

The number of milliseconds to delay after the end of an animation. This is primarily of use when sequencing animations based on the end time of another animation. Defaults to 0.

AnimationEffectTimingReadOnly.fill

Dictates whether the animation's effects should be reflected by the element(s) state prior to playing (backwards), retained after the animation has completed playing (forwards), or both. Defaults to none.

AnimationEffectTimingReadOnly.iterationStart

A number representing the which repetition the animation begins at and its progress through it.

AnimationEffectTimingReadOnly.iterations

The number of times the animation should repeat. Defaults to 1, and can also take a value of infinity to make it repeat infinitely.

AnimationEffectTimingReadOnly.duration

The number of milliseconds each iteration of the animation takes to complete. Defaults to 0.

AnimationEffectReadOnly.direction

Whether the animation runs forwards (normal), backwards (reverse), switches direction after each iteration (alternate), or runs backwards and switches direction after each iteration (alternate-reverse). Defaults to normal.

AnimationEffectTimingReadOnly.easing

The rate of the animation's change over time. Accepts the pre-defined values linear, ease, ease-in, ease-out, and ease-in-out, or a custom cubic-bezier value like cubic-bezier(0.42, 0, 0.58, 1). Defaults to linear.

Examples

In the Growing and Shrinking Alice example, we set Alice's animation — aliceChange — at halfway complete by getting the duration of its effect's timing attribute, which returns an AnimationEffectTiming object:

aliceChange.currentTime = aliceChange.effect.timing.duration / 2 ;

Specifications

Browser compatibility

[1] The Web Animations API is only enabled by default in Firefox Developer Edition and Nightly builds. You can enable it in beta and release builds by setting the preference dom.animations-api.core.enabled to true, and can disable it in any Firefox version by setting this preference to false.

See also

• KeyframeEffect
• Web Animations API
• Inherits from AnimationEffectTimingReadOnly