@wordpress/editor/build-module/components/document-outline/check.js

Enhanced block editor for WordPress posts.

/**
 * External dependencies
 */
import { filter } from 'lodash';
/**
 * WordPress dependencies
 */

import { withSelect } from '@wordpress/data';
import { store as blockEditorStore } from '@wordpress/block-editor';

function DocumentOutlineCheck({
  blocks,
  children
}) {
  const headings = filter(blocks, block => block.name === 'core/heading');

  if (headings.length < 1) {
    return null;
  }

  return children;
}

export default withSelect(select => ({
  blocks: select(blockEditorStore).getBlocks()
}))(DocumentOutlineCheck);
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