@wordpress/block-editor/build-module/hooks/metadata.js

Generic block editor.

/**
 * WordPress dependencies
 */
import { addFilter } from '@wordpress/hooks';
const META_ATTRIBUTE_NAME = 'metadata';

/**
 * Filters registered block settings, extending attributes to include `metadata`.
 *
 * see: https://github.com/WordPress/gutenberg/pull/40393/files#r864632012
 *
 * @param {Object} blockTypeSettings Original block settings.
 * @return {Object} Filtered block settings.
 */
export function addMetaAttribute(blockTypeSettings) {
  // Allow blocks to specify their own attribute definition with default values if needed.
  if (blockTypeSettings?.attributes?.[META_ATTRIBUTE_NAME]?.type) {
    return blockTypeSettings;
  }
  blockTypeSettings.attributes = {
    ...blockTypeSettings.attributes,
    [META_ATTRIBUTE_NAME]: {
      type: 'object'
    }
  };
  return blockTypeSettings;
}
addFilter('blocks.registerBlockType', 'core/metadata/addMetaAttribute', addMetaAttribute);
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