@wordpress/editor/src/components/post-last-revision/check.js

Enhanced block editor for WordPress posts.

import { useSelect } from '@wordpress/data';
import PostTypeSupportCheck from '../post-type-support-check';
import { store as editorStore } from '../../store';

/**
 * Wrapper component that renders its children if the post has more than one revision.
 *
 * @param {Object}          props          Props.
 * @param {React.ReactNode} props.children Children to be rendered.
 *
 * @return {React.ReactNode} Rendered child components if post has more than one revision, otherwise null.
 */
function PostLastRevisionCheck( { children } ) {
	const { lastRevisionId, revisionsCount } = useSelect( ( select ) => {
		const { getCurrentPostLastRevisionId, getCurrentPostRevisionsCount } =
			select( editorStore );
		return {
			lastRevisionId: getCurrentPostLastRevisionId(),
			revisionsCount: getCurrentPostRevisionsCount(),
		};
	}, [] );

	if ( ! lastRevisionId || revisionsCount < 2 ) {
		return null;
	}

	return (
		<PostTypeSupportCheck supportKeys="revisions">
			{ children }
		</PostTypeSupportCheck>
	);
}

export default PostLastRevisionCheck;