Closing modals or dropdown on Outside click or scroll.

Ever built a modal or dropdown and struggled to figure out how to close it when the user clicks outside it? Yep..

Here's a cool react hook for you that can deal with that

import { useEffect, useRef } from "react";

const useOutsideClickOrScroll = <T extends HTMLElement>(
  callback: () => void
) => {
  const ref = useRef<T>(null);

  useEffect(() => {
    const handleClickOutside = (event: MouseEvent) => {
      if (ref.current && !ref.current.contains(event.target as Node)) {
        callback();
      }
    };

    const handleScroll = () => {
      callback();
    };

    document.addEventListener("mousedown", handleClickOutside);
    window.addEventListener("scroll", handleScroll, true);

    return () => {
      document.removeEventListener("mousedown", handleClickOutside);
      window.removeEventListener("scroll", handleScroll, true);
    };
  }, [callback]);

  return ref;
};

export default useOutsideClickOrScroll;

This hook uses useRef to target a DOM element and triggers a callback on outside clicks or scroll events, ensuring proper cleanup with useEffect. It returns the ref for easy attachment to any DOM element.

Here's a sample usage

import React, { useState } from "react";
import useOutsideClickOrScroll from "./useOutsideClickOrScroll";

const Dropdown = () => {
  const [isOpen, setIsOpen] = useState(false);

  const handleClose = () => {
    setIsOpen(false);
  };

  const ref = useOutsideClickOrScroll<HTMLDivElement>(handleClose);

  return (
    <div>
      <button onClick={() => setIsOpen(!isOpen)}>Toggle Dropdown</button>
      {isOpen && (
        <div ref={ref}>
          <p>Dropdown Content</p>
        </div>
      )}
    </div>
  );
};

export default Dropdown;