useOnClickOutside is a custom hook that allows you to detect clicks outside of a specified element. In the example below we use it to close a modal when any element outside of the modal is clicked. By abstracting this logic out into a hook we can easily use it across all of our components that need this kind of functionality (dropdown menus, tooltips, etc)

Import

import { useOnClickOutside } from '@dwarvesf/react-hooks'

Usage

function Example() {
  function Modal({ title, content, onClose }) {
    const ref = React.useRef(null)
    // Call hook to lock body scroll
    useOnClickOutside(ref, onClose)
    return (
      <div
        style={{
          backgroundColor: 'rgba(0,0,0,0.5)',
          zIndex: 9999,
          display: 'flex',
          justifyContent: 'center',
          alignItems: 'center',
          top: 0,
          left: 0,
          right: 0,
          bottom: 0,
          position: 'absolute',
        }}
      >
        <div style={{ backgroundColor: 'white', padding: '30px' }} ref={ref}>
          <h2>{title}</h2>
          <p>{content}</p>
        </div>
      </div>
    )
  }

  function App() {
    // State for our modal
    const [modalOpen, setModalOpen] = useState(false)
    return (
      <div>
        <button onClick={() => setModalOpen(true)}>Show Modal</button>
        {modalOpen && (
          <Modal
            title="Try clicking outside"
            content="The modal should be closed 😎"
            onClose={() => setModalOpen(false)}
          />
        )}
      </div>
    )
  }

  return <App />
}

Parameters

The useOnClickOutside hook accepts an optional object with the following properties:

Name	Type	Default	Description
ref	React.RefObject	_	The ref of the element.
callback	(event) => void	_	The callback when clicking outside the element.