How to track a click outside of a component?

Question

React

I have a functional style component, how can I track a click outside of the component?

Answer 1

const rootEl = useRef(null);

useEffect(() => {
  const onClick = e => rootEl.current.contains(e.target) || console.log('клик вне компонента');
  document.addEventListener('click', onClick);
  return () => document.removeEventListener('click', onClick);
}, []);

return (
  <div ref={rootEl}>
    ...
  </div>
);