@wordpress/block-editor/build-module/hooks/aria-label.js

Generic block editor.

/**
 * WordPress dependencies
 */
import { addFilter } from '@wordpress/hooks';
import { hasBlockSupport } from '@wordpress/blocks';

/**
 * Filters registered block settings, extending attributes with ariaLabel using aria-label
 * of the first node.
 *
 * @param {Object} settings Original block settings.
 *
 * @return {Object} Filtered block settings.
 */
export function addAttribute(settings) {
  // Allow blocks to specify their own attribute definition with default values if needed.
  if (settings?.attributes?.ariaLabel?.type) {
    return settings;
  }
  if (hasBlockSupport(settings, 'ariaLabel')) {
    // Gracefully handle if settings.attributes is undefined.
    settings.attributes = {
      ...settings.attributes,
      ariaLabel: {
        type: 'string'
      }
    };
  }
  return settings;
}

/**
 * Override props assigned to save component to inject aria-label, if block
 * supports ariaLabel. This is only applied if the block's save result is an
 * element and not a markup string.
 *
 * @param {Object} extraProps Additional props applied to save element.
 * @param {Object} blockType  Block type.
 * @param {Object} attributes Current block attributes.
 *
 * @return {Object} Filtered props applied to save element.
 */
export function addSaveProps(extraProps, blockType, attributes) {
  if (hasBlockSupport(blockType, 'ariaLabel')) {
    extraProps['aria-label'] = attributes.ariaLabel === '' ? null : attributes.ariaLabel;
  }
  return extraProps;
}
export default {
  addSaveProps,
  attributeKeys: ['ariaLabel'],
  hasSupport(name) {
    return hasBlockSupport(name, 'ariaLabel');
  }
};
addFilter('blocks.registerBlockType', 'core/ariaLabel/attribute', addAttribute);
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