schemadotorg_demo-1.0.x-dev/modules/schemadotorg_demo_api/schemadotorg_demo_api.module

<?php

/**
 * @file
 * Enables and configures API support for the Schema.org Blueprints Demo.
 */

declare(strict_types=1);

/**
 * Implements hook_page_attachments().
 */
function schemadotorg_demo_api_page_attachments(array &$page): void {
  if (\Drupal::routeMatch()->getRouteName() === 'openapi.documentation') {
    $page['#attached']['library'][] = 'schemadotorg_demo_api/schemadotorg_demo_api';
  }
}