iterationCompositeThe iterationComposite property of a KeyframeEffect object sets whether an animation's iterations are calculated independently ("replace") or are accumulated with the value of the previous iteration ("accumulate").limitedhttps://drafts.csswg.org/web-animations-2/#the-iterationcompositeoperation-enumerationhttps://developer.mozilla.org/docs/Web/API/KeyframeEffect/iterationCompositeapi.Element.animate.options_iterationComposite_parameterapi.KeyframeEffect.iterationCompositehttps://nowyoucanuse.com/features--web-animations-iterationcomposite.html