| import { useEffect } from 'react'; | |
| // https://usehooks.com/useOnClickOutside/ | |
| const useOnClickOutside = (ref, handler) => { | |
| useEffect( | |
| () => { | |
| const listener = event => { | |
| // Do nothing if clicking ref's element or descendent elements | |
| if (!ref.current || ref.current.contains(event.target)) { | |
| return; | |
| } | |
| handler(event); | |
| }; | |
| document.addEventListener('mousedown', listener); | |
| document.addEventListener('touchstart', listener); | |
| return () => { | |
| document.removeEventListener('mousedown', listener); | |
| document.removeEventListener('touchstart', listener); | |
| }; | |
| }, | |
| // Add ref and handler to effect dependencies | |
| // It's worth noting that because passed in handler is a new ... | |
| // ... function on every render that will cause this effect ... | |
| // ... callback/cleanup to run every render. It's not a big deal ... | |
| // ... but to optimize you can wrap handler in useCallback before ... | |
| // ... passing it into this hook. | |
| [ref, handler], | |
| ); | |
| }; | |
| export default useOnClickOutside; | |