Drupal 8 base_path and base_path_url.

We have syntax change in drupal 8 for base_path and base_path_url, Please have a look..

• base_path = base_path();  // This code is for base_url of site.                                                    
• base_path_url = \Drupal::request()->getpathInfo();  // This code for current page path.
• Front page = {{ url('<front>') }}  // This code is for front page url.
• Theme directory path = url('{{ base_path ~ directory }} //This code is for theme's root directory

Note: If have any suggestions or issue regarding 'Drupal 8 base_path and base_path_url' then you can ask by comments.