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useOutsideAlerter


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import React, { useRef, useEffect } from "react";function useOutsideAlerter(ref) {
    useEffect(() => {
        function handleClickOutside(event) {
            if (ref.current && !ref.current.contains(event.target))
                 alert("You clicked outside of me!");
        }
        document.addEventListener("mousedown", handleClickOutside);
        return () => {
            document.removeEventListener("mousedown", handleClickOutside);
        };
    }, [ref]);}export default function OutsideAlerter(props) {
    const wrapperRef = useRef(null);
    useOutsideAlerter(wrapperRef);
    return <div ref={wrapperRef}>{props.children}</div>;}