AnimationEffect interface of the Web Animations API is an interface representing animation effects.
AnimationEffect is an abstract interface and so isn't directly instantiable. However, concrete interfaces such as
KeyframeEffect inherit from it, and instances of these interfaces can be passed to
Animation objects for playing, and may also be used by CSS Animations and Transitions.
Returns the object associated with the animation containing all the animation's timing values.
Returns the calculated timing properties for this
Updates the specified timing properties of this
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