useWatchElementFocused

import { useWatchElementFocused } from '@arrow-navigation/react'

const App = () => {
  const isBtn1Focused = useWatchElementFocused('btn-1')

  return (
    <div>
      <FocusableGroup id="group-1">
        <FocusableElement id="btn-1">
          Button 1
        </FocusableElement>
        <FocusableElement id="btn-2">
          Button 2
        </FocusableElement>
      </FocusableGroup>
      <div>
        {isBtn1Focused && <span>Button 1 is focused</span>}
      </div>
    </div>
  )
}

ReactDOM.render(<App />, document.getElementById('root'))