public function viewport(array $options = [])
    {
        $content = http_build_query([
            'initial-scale' => '1',
            'shrink-to-fit' => 'no',
            'width' => 'device-width',
        ], null, ', ');

        return self::meta(array_merge(['name' => 'viewport'], compact('content')), null, $options);
    }