The getComputedTiming() method of the AnimationEffect interface returns the calculated timing properties for this animation effect.
The AnimationEffect.getTiming() method of the AnimationEffect interface returns an object containing the timing properties for the Animation Effect.
The updateTiming() method of the AnimationEffect interface updates the specified timing properties for an animation effect.
Optionaltiming: OptionalEffectTiming
The
AnimationEffectinterface of the Web Animations API is an interface representing animation effects.MDN Reference