Detect click outside component react hooks

Check out this library from Andarist called use-onclickoutside.

import * as React from 'react'
import useOnClickOutside from 'use-onclickoutside'

export default function Modal({ close }) {
  const ref = React.useRef(null)
  useOnClickOutside(ref, close)

  return <div ref={ref}>{'Modal content'}</div>
}

the useRef API should be used like this:

import React, { useState, useRef, useEffect } from "react";
import ReactDOM from "react-dom";

function App() {
  const wrapperRef = useRef(null);
  const [isVisible, setIsVisible] = useState(true);

  // below is the same as componentDidMount and componentDidUnmount
  useEffect(() => {
    document.addEventListener("click", handleClickOutside, false);
    return () => {
      document.removeEventListener("click", handleClickOutside, false);
    };
  }, []);

  const handleClickOutside = event => {
    if (wrapperRef.current && !wrapperRef.current.contains(event.target)) {
      setIsVisible(false);
    }
  };

  return (
    isVisible && (
      <div className="menu" ref={wrapperRef}>
        <p>Menu</p>
      </div>
    )
  );
}

const rootElement = document.getElementById("root");
ReactDOM.render(<App />, rootElement);

I have created this common hook, which can be used for all divs which want this functionality.

import { useEffect } from 'react';

/**
 *
 * @param {*} ref - Ref of your parent div
 * @param {*} callback - Callback which can be used to change your maintained state in your component
 * @author Pranav Shinde 30-Nov-2021
 */
const useOutsideClick = (ref, callback) => {
    useEffect(() => {
        const handleClickOutside = (evt) => {
            if (ref.current && !ref.current.contains(evt.target)) {
                callback(); //Do what you want to handle in the callback
            }
        };
        document.addEventListener('mousedown', handleClickOutside);
        return () => {
            document.removeEventListener('mousedown', handleClickOutside);
        };
    });
};

export default useOutsideClick;

Usage -

1. Import the hook in your component
2. Add a ref to your wrapper div and pass it to the hook
3. add a callback function to change your state(Hide the dropdown/modal)

import React, { useRef } from 'react';
import useOutsideClick from '../../../../hooks/useOutsideClick';

const ImpactDropDown = ({ setimpactDropDown }) => {
    const impactRef = useRef();

    useOutsideClick(impactRef, () => setimpactDropDown(false)); //Change my dropdown state to close when clicked outside

    return (
        <div ref={impactRef} className="wrapper">
            {/* Your Dropdown or Modal */}
        </div>
    );
};

export default ImpactDropDown;