/**
 * Returns a controller object for setting a timeout that is properly cleaned up
 * once the component unmounts. New timeouts cancel and replace existing ones.
 *
 *
 *
 * ```tsx
 * const { set, clear } = useTimeout();
 * const [hello, showHello] = useState(false);
 * //Display hello after 5 seconds
 * set(() => showHello(true), 5000);
 * return (
 *   <div className="App">
 *     {hello ? <h3>Hello</h3> : null}
 *   </div>
 * );
 * ```
 */
export default function useTimeout(): {
    set: (fn: () => void, delayMs?: number) => void;
    clear: () => void;
};