Is it possible in Drupal 8, to add a class to the body tag based on the current path alias?


In your theme, you can add the following code in template_preprocess_html:

  $current_path = \Drupal::service('path.current')->getPath();
  $path_alias = \Drupal::service('path.alias_manager')->getAliasByPath($current_path);
  $path_alias = ltrim($path_alias, '/');
  $variables['attributes']['class'][] = \Drupal\Component\Utility\Html::cleanCssIdentifier($path_alias);

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