@wordpress/block-editor/build-module/components/block-list/use-block-props/use-block-default-class-name.js

Generic block editor.

/**
 * WordPress dependencies
 */
import { useSelect } from '@wordpress/data';
import { hasBlockSupport, getBlockType, getBlockDefaultClassName } from '@wordpress/blocks';
/**
 * Internal dependencies
 */

import { store as blockEditorStore } from '../../../store';
/**
 * Returns the default class name if the block is a light block and it supports
 * `className`.
 *
 * @param {string} clientId The block client ID.
 *
 * @return {string} The class name, e.g. `wp-block-paragraph`.
 */

export function useBlockDefaultClassName(clientId) {
  return useSelect(select => {
    const name = select(blockEditorStore).getBlockName(clientId);
    const blockType = getBlockType(name);
    const hasLightBlockWrapper = blockType.apiVersion > 1 || hasBlockSupport(blockType, 'lightBlockWrapper', false);

    if (!hasLightBlockWrapper) {
      return;
    }

    return getBlockDefaultClassName(name);
  }, [clientId]);
}
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