Barryvdh\Debugbar\Controllers\AssetController::js PHP Метод

    public function js()
    {
        $renderer = $this->debugbar->getJavascriptRenderer();
        $content = $renderer->dumpAssetsToString('js');
        $response = new Response($content, 200, ['Content-Type' => 'text/javascript']);
        return $this->cacheResponse($response);
    }