JsDisplaceThemeHooks.php

<?php

declare (strict_types=1);
namespace Drupal\js_displace\Hook;

use Drupal\Core\Hook\Attribute\Hook;

/**
 * Theme hook implementations for js_displace module.
 */
class JsDisplaceThemeHooks {
  
  /**
   * Implements hook_preprocess_HOOK().
   */
  public function preprocessHtml(&$variables) : void {
    $variables['#attached']['library'][] = 'core/drupal.displace';
  }

}