/**
 * Just forward `useMergeRefs` from floating-ui
 */
export declare function useMergeRefs<Instance>(...refs: Array<React.Ref<Instance>>): React.RefCallback<Instance> | null;
/**
 * Run event handlers in sequence, break if event is already prevented
 */
export declare function useMergeEventHandlers<Event extends {
    preventDefault(): void;
    isDefaultPrevented(): boolean;
}>(...eventHandlers: Array<((e: Event) => void) | undefined>): (e: Event) => void;
/**
 * This helps because the react style property cannot set custom css property
 */
export declare function refCSSProperty(property: string, value?: string | null, priority?: '' | 'important'): <E extends HTMLElement>(el?: E | null) => void;
/**
 * This helps because the react style property cannot set custom css property
 */
export declare function refCSSProperties(properties: Record<string, string | null | undefined | [string, 'important' | '']>): <E extends HTMLElement>(el?: E | null) => void;