@wordpress/components/build-module/tree-grid/roving-tab-index-item.js

UI components for WordPress.

import { createElement } from "@wordpress/element";

/**
 * WordPress dependencies
 */
import { useRef, forwardRef } from '@wordpress/element';
/**
 * Internal dependencies
 */

import { useRovingTabIndexContext } from './roving-tab-index-context';
export const RovingTabIndexItem = forwardRef(function UnforwardedRovingTabIndexItem(_ref, forwardedRef) {
  let {
    children,
    as: Component,
    ...props
  } = _ref;
  const localRef = useRef();
  const ref = forwardedRef || localRef; // @ts-expect-error - We actually want to throw an error if this is undefined.

  const {
    lastFocusedElement,
    setLastFocusedElement
  } = useRovingTabIndexContext();
  let tabIndex;

  if (lastFocusedElement) {
    tabIndex = lastFocusedElement === ( // TODO: The original implementation simply used `ref.current` here, assuming
    // that a forwarded ref would always be an object, which is not necessarily true.
    // This workaround maintains the original runtime behavior in a type-safe way,
    // but should be revisited.
    'current' in ref ? ref.current : undefined) ? 0 : -1;
  }

  const onFocus = event => setLastFocusedElement === null || setLastFocusedElement === void 0 ? void 0 : setLastFocusedElement(event.target);

  const allProps = {
    ref,
    tabIndex,
    onFocus,
    ...props
  };

  if (typeof children === 'function') {
    return children(allProps);
  }

  if (!Component) return null;
  return createElement(Component, allProps, children);
});
export default RovingTabIndexItem;
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