export default function useFocusWithin()

in packages/hooks/src/useFocusWithin/index.tsx [11:44]

• 31 lines of code
• 5 McCabe index (conditional complexity)

export default function useFocusWithin(target: BasicTarget, options?: Options) {
  const [isFocusWithin, setIsFocusWithin] = useState(false);
  const { onFocus, onBlur, onChange } = options || {};

  useEventListener(
    'focusin',
    (e: FocusEvent) => {
      if (!isFocusWithin) {
        onFocus?.(e);
        onChange?.(true);
        setIsFocusWithin(true);
      }
    },
    {
      target,
    },
  );

  useEventListener(
    'focusout',
    (e: FocusEvent) => {
      if (isFocusWithin && !(e.currentTarget as Element)?.contains?.(e.relatedTarget as Element)) {
        onBlur?.(e);
        onChange?.(false);
        setIsFocusWithin(false);
      }
    },
    {
      target,
    },
  );

  return isFocusWithin;
}