Detect click outside React component using hooks

Question

I am finding that I am reusing behaviour across an app that when a user clicks outside an element I can hide it.

With the introduction of hooks is this something I

Answer 1

This is possible.

You can create a reusable hook called useComponentVisible

import { useState, useEffect, useRef } from 'react';

export default function useComponentVisible(initialIsVisible) {
    const [isComponentVisible, setIsComponentVisible] = useState(initialIsVisible);
    const ref = useRef(null);

    const handleHideDropdown = (event: KeyboardEvent) => {
        if (event.key === 'Escape') {
            setIsComponentVisible(false);
        }
    };

    const handleClickOutside = (event: Event) => {
        if (ref.current && !ref.current.contains(event.target as Node)) {
            setIsComponentVisible(false);
        }
    };

    useEffect(() => {
        document.addEventListener('keydown', handleHideDropdown, true);
        document.addEventListener('click', handleClickOutside, true);
        return () => {
            document.removeEventListener('keydown', handleHideDropdown, true);
            document.removeEventListener('click', handleClickOutside, true);
        };
    });

    return { ref, isComponentVisible, setIsComponentVisible };
}

Then in the component you wish to add the functionality to do the following:

const DropDown = () => {

    const { ref, isComponentVisible } = useComponentVisible(true);

    return (
       

          {isComponentVisible && (
Going into Hiding
)}
       
    );

}

Find a codesandbox example here.