book-tree.html.twig

Default theme implementation to display a book tree.

Returns HTML for a wrapper for a book sub-tree.

Available variables:

• items: A nested list of book items. Each book item contains:
  • attributes: HTML attributes for the book item.
  • below: The book item child items.
  • title: The book link title.
  • url: The book link URL, instance of \Drupal\Core\Url.
  • is_expanded: TRUE if the link has visible children within the current book tree.
  • is_collapsed: TRUE if the link has children within the current book tree that are not currently visible.
  • in_active_trail: TRUE if the link is in the active trail.

File

core/modules/book/templates/book-tree.html.twig

Related topics

Theme system overview

Functions and templates for the user interface that themes can override.