/// <reference types="react" />
declare type MouseEventKeyMap<T> = {
    [P in keyof T as T[P] extends MouseEvent ? P : never]: T[P];
};
declare type MouseEventKey = keyof MouseEventKeyMap<DocumentEventMap>;
interface Options {
    /** The mouse event to listen for. Defaults to "mousedown" so clicking triggers
     * the alert. But a tooltip popup might prefer "mouseover" */
    event?: MouseEventKey;
}
export declare function useOutsideAlerter(ref: React.RefObject<HTMLElement>, callback: (event: MouseEvent) => void, options?: Options): void;
export {};