diff -u b/core/modules/system/templates/field.html.twig b/core/modules/system/templates/field.html.twig
--- b/core/modules/system/templates/field.html.twig
+++ b/core/modules/system/templates/field.html.twig
@@ -31,16 +31,14 @@
 #}
 
 {#
-We want to make it easy for the themer to remove or add css classes easy.
+We want to make it easy for the themer to remove & add css classes easy.
 Instead of hiding these as a string in the preprocess, they are done inside of
-the tempate file.
-{{ attributes.class }} is providing a placeholder for mddules that wants the
-option to add classes to a field.
-
-{{ attributes }} , {{ title_attributes }} & {{ item_attributes[delta] }} ...
+the tempate file {{ attributes.class }} is providing a placeholder for mddules
+that wants to add classes to a field.
 #}
 {% set cssclass %}
 field field-name--{{ field_name }} field-type--{{ field_type }} field-label--{{ field_label }} {{ attributes.class }}
+    'field-' . $variables['entity_type_css'] . '--' . $variables['field_name_css'],
 {% endset %}
 
 {% if multiple and not label_hidden %}
only in patch2:
unchanged:
--- a/core/modules/node/templates/node.html.twig
+++ b/core/modules/node/templates/node.html.twig
@@ -75,7 +75,7 @@
  * @ingroup themeable
  */
 #}
-<article id="node-{{ node.id }}" class="{{ attributes.class }} clearfix"{{ attributes }}>
+<article class="{{ attributes.class }} clearfix"{{ attributes }}>
 
   {{ title_prefix }}
   {% if not page %}