@wordpress/block-editor/build-module/components/inner-blocks/use-block-context.js

Generic block editor.

/**
 * WordPress dependencies
 */
import { store as blocksStore } from '@wordpress/blocks';
import { useSelect } from '@wordpress/data';

/**
 * Internal dependencies
 */
import { store as blockEditorStore } from '../../store';

/**
 * Returns a context object for a given block.
 *
 * @param {string} clientId The block client ID.
 *
 * @return {Record<string,*>} Context value.
 */
export default function useBlockContext(clientId) {
  return useSelect(select => {
    const block = select(blockEditorStore).getBlock(clientId);
    if (!block) {
      return undefined;
    }
    const blockType = select(blocksStore).getBlockType(block.name);
    if (!blockType) {
      return undefined;
    }
    if (Object.keys(blockType.providesContext).length === 0) {
      return undefined;
    }
    return Object.fromEntries(Object.entries(blockType.providesContext).map(([contextName, attributeName]) => [contextName, block.attributes[attributeName]]));
  }, [clientId]);
}
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