diff --git a/core/modules/node/templates/node.html.twig b/core/modules/node/templates/node.html.twig
index a7e511d..bfce74f 100644
--- a/core/modules/node/templates/node.html.twig
+++ b/core/modules/node/templates/node.html.twig
@@ -11,10 +11,6 @@
  *   - createdtime: Formatted creation date. Preprocess functions can
  *     reformat it by calling format_date() with the desired parameters on
  *     $variables['node']->getCreatedTime().
- *   - isPromoted(): Whether the node is promoted to the front page.
- *   - isSticky(): Whether the node is 'sticky'. Sticky nodes are ordered above
- *     other non-sticky nodes in teaser listings
- *   - isPublished(): Whether the node is published.
  * - label: The title of the node.
  * - content: All node items. Use {{ content }} to print them all,
  *   or print a subset such as {{ content.field_example }}. Use
@@ -33,8 +29,8 @@
  *   The attributes.class element may contain one or more of the following
  *   classes:
  *   - node: The current template type (also known as a "theming hook").
- *   - node--[type]: The current node type. For example, if the node is a
- *     "Article" it would result in "node--article". Note that the machine
+ *   - node--type-[type]: The current node type. For example, if the node is a
+ *     "Article" it would result in "node--type-article". Note that the machine
  *     name will often be in a short form of the human readable label.
  *   - node--view-mode-[view_mode]: The View Mode of the node; for example, a
  *     teaser would result in: "node--view-mode-teaser", and
@@ -84,7 +80,6 @@
     node.isSticky() ? 'node--sticky',
     not node.isPublished() ? 'node--unpublished',
     view_mode ? 'node--view-mode-' ~ view_mode|clean_class,
-    preview ? 'node--preview',
   ]
 %}
 <article{{ attributes.addClass(classes) }}>
diff --git a/core/themes/bartik/templates/node.html.twig b/core/themes/bartik/templates/node.html.twig
index c6d0aee..57297c6 100644
--- a/core/themes/bartik/templates/node.html.twig
+++ b/core/themes/bartik/templates/node.html.twig
@@ -11,15 +11,11 @@
  *   - createdtime: Formatted creation date. Preprocess functions can
  *     reformat it by calling format_date() with the desired parameters on
  *     $variables['node']->getCreatedTime().
- *   - isPromoted(): Whether the node is promoted to the front page.
- *   - isSticky(): Whether the node is 'sticky'. Sticky nodes are ordered above
- *     other non-sticky nodes in teaser listings
- *   - isPublished(): Whether the node is published.
  * - label: The title of the node.
  * - content: All node items. Use {{ content }} to print them all,
  *   or print a subset such as {{ content.field_example }}. Use
- *   {{ content|without('field_example') }} to exclude the printing of a
- *   given child element.
+ *   {{ content|without('field_example') %} to temporarily suppress the printing
+ *   of a given child element.
  * - author_picture: The node author user entity, rendered using the "compact"
  *   view mode.
  * - metadata: Metadata for this node.
@@ -33,13 +29,12 @@
  *   The attributes.class element may contain one or more of the following
  *   classes:
  *   - node: The current template type (also known as a "theming hook").
- *   - node--[type]: The current node type. For example, if the node is a
- *     "Article" it would result in "node--article". Note that the machine
+ *   - node--type-[type]: The current node type. For example, if the node is a
+ *     "Article" it would result in "node--type-article". Note that the machine
  *     name will often be in a short form of the human readable label.
  *   - node--view-mode-[view_mode]: The View Mode of the node; for example, a
- *     teaser would result in: "node--view-mode-teaser",
- *     and full: "node--view-mode-full".
- *   - is-preview: Whether a node is in preview mode.
+ *     teaser would result in: "node--view-mode-teaser", and
+ *     full: "node--view-mode-full".
  *   The following are controlled through the node publishing options.
  *   - node--promoted: Appears on nodes promoted to the front page.
  *   - node--sticky: Appears on nodes ordered above other non-sticky nodes in
@@ -79,7 +74,6 @@
     node.isSticky() ? 'node--sticky',
     not node.isPublished() ? 'node--unpublished',
     view_mode ? 'node--view-mode-' ~ view_mode|clean_class,
-    preview ? 'node--preview',
     'clearfix',
   ]
 %}