export declare function fadeDuration(duration: number, fraction: number): number;
export declare function parseTranslate(element: HTMLElement): {
    tx: number;
    ty: number;
};
export declare function layoutSize(element: HTMLElement): {
    width: number;
    height: number;
};
/** Every `element.animate` call site goes through this so a jsdom-less env degrades. */
export declare function animateElement(element: HTMLElement, keyframes: Keyframe[] | PropertyIndexedKeyframes, options: KeyframeAnimationOptions): Animation | null;
export declare function getAnimationsOf(element: HTMLElement): Animation[];
export declare function cancelAnimations(element: HTMLElement): {
    tx: number;
    ty: number;
    opacity: number;
};