export declare function getProperty(element: Element, property: string): string; export declare function getIntegerProperty(element: Element, property: string): number | null; export declare function getLengthProperty(element: Element, property: string): number | null; export declare function getLengthPropertyAsArray(element: Element, property: string): (number | null)[] | null; export declare function useTransitionListener(pseudoElement?: string): { track: () => void; listener: (event: TransitionEvent) => void; };