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In my bootstrap theme, I am trying to make the id of the paragraph the same as an attribute for each of the child nodes, so an accordion will work properly. I have tried looking at doing it through hooks, but I can't seem to access the paragraph data from my node hook.

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You can use hook_preprocess_paragraph hook to set the same id to all child nodes, in the below code snippet example all child nodes will have paragraph-PARAGRAPH-ID as id.

use Drupal\Component\Utility\Html;
/**
 * Implements hook_preprocess_HOOK().
 */
function myModule_preprocess_paragraph(&$variables) {
  $paragraph = $variables['paragraph'];
  $identifier = Html::cleanCssIdentifier('paragraph-' . $paragraph->id());
  $variables['attributes']['id'] = $identifier;
}  
  • How would I put the paragraph id in a different attribute like "data-parent" in the child node? – Will Feb 25 at 18:32
  • try with $variables['attributes']['data-parent'] = $identifier; instead of $variables['attributes']['id'] = $identifier; . – berramou Feb 25 at 19:04
  • I know I can do something like $variables['var_name'] to have it be a variable in the paragraph twig file. How would I do this to get the variable (in my case paragraph id) inside the children node twig files too? – Will Feb 25 at 19:41

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