import {useEffect, useRef} from 'react'; export default function useMount(selector: string): HTMLElement | undefined { const container = useRef(null); useEffect(() => { const mount = document.querySelector(selector)!; const div = document.createElement('div'); container.current = div; mount.append(div); return () => { div.remove(); container.current = null; }; }, [selector]); return container.current; }