diff --git a/core/includes/common.inc b/core/includes/common.inc
index 2def62d..d11a3f8 100644
--- a/core/includes/common.inc
+++ b/core/includes/common.inc
@@ -3992,7 +3992,20 @@ function render(&$element) {
   }
   if (is_array($element)) {
     show($element);
-    return drupal_render($element, TRUE);
+
+    // Try to get the rendered element from the static cache. This only
+    // persists for the current request, and is needed because we test if a
+    // render array produces output by rendering it and checking if the output
+    // is empty. So without this, if the element is not cached by drupal_render,
+    // it is rendered for each test, and also for printing on page.
+    $static_cache = &drupal_static(__FUNCTION__);
+    $static_cid = md5(serialize($element));
+
+    if (!isset($static_cache[$static_cid])) {
+      $static_cache[$static_cid] = drupal_render($element, TRUE);
+    }
+
+    return $static_cache[$static_cid];
   }
   else {
     // Safe-guard for inappropriate use of render() on flat variables: return
@@ -4057,6 +4070,20 @@ function show(&$element) {
 }
 
 /**
+ * Tests if a render array produces output in the current context.
+ *
+ * @param array $element
+ *   The render array to test.
+ *
+ * @return boolean
+ *   Whether the render array produced content or not.
+ */
+function is_printable($element) {
+  $rendered = render($element);
+  return !empty($rendered);
+}
+
+/**
  * Gets the cached, prerendered element of a renderable element from the cache.
  *
  * @param array $elements
diff --git a/core/lib/Drupal/Core/Template/TwigExtension.php b/core/lib/Drupal/Core/Template/TwigExtension.php
index 4cb31ca..d16745a 100644
--- a/core/lib/Drupal/Core/Template/TwigExtension.php
+++ b/core/lib/Drupal/Core/Template/TwigExtension.php
@@ -56,6 +56,15 @@ public function getFilters() {
   /**
    * {@inheritdoc}
    */
+  public function getTests() {
+    return array(
+      new \Twig_SimpleTest('printable', 'is_printable'),
+    ); 
+  }
+
+  /**
+   * {@inheritdoc}
+   */
   public function getNodeVisitors() {
     // The node visitor is needed to wrap all variables with
     // render_var -> twig_render_var() function.
diff --git a/core/modules/aggregator/templates/aggregator-item.html.twig b/core/modules/aggregator/templates/aggregator-item.html.twig
index 8c23106..76ec14c 100644
--- a/core/modules/aggregator/templates/aggregator-item.html.twig
+++ b/core/modules/aggregator/templates/aggregator-item.html.twig
@@ -28,7 +28,7 @@
     <span class="feed-item-date">{{ source_date }}</span>
   </div>
 
-  {% if content %}
+  {% if content is printable %}
     <div class="feed-item-body">
       {{ content }}
     </div>
diff --git a/core/modules/block/templates/block.html.twig b/core/modules/block/templates/block.html.twig
index 3c51d46..711ddf5 100644
--- a/core/modules/block/templates/block.html.twig
+++ b/core/modules/block/templates/block.html.twig
@@ -43,7 +43,7 @@
 #}
 <div{{ attributes }}>
   {{ title_prefix }}
-  {% if label %}
+  {% if label is printable %}
     <h2{{ title_attributes }}>{{ label }}</h2>
   {% endif %}
   {{ title_suffix }}
diff --git a/core/modules/comment/templates/comment-wrapper.html.twig b/core/modules/comment/templates/comment-wrapper.html.twig
index b19c051..6f52da7 100644
--- a/core/modules/comment/templates/comment-wrapper.html.twig
+++ b/core/modules/comment/templates/comment-wrapper.html.twig
@@ -36,7 +36,7 @@
  */
 #}
 <section{{ attributes }}>
-  {% if comments and (entity.entityType != 'node' or entity.bundle != 'forum') %}
+  {% if comments is printable and (entity.entityType != 'node' or entity.bundle != 'forum') %}
     {{ title_prefix }}
     <h2 class="title">{{ 'Comments'|t }}</h2>
     {{ title_suffix }}
@@ -44,7 +44,7 @@
 
   {{ comments }}
 
-  {% if form %}
+  {% if form is printable %}
     <h2 class="title comment-form">{{ 'Add new comment'|t }}</h2>
     {{ form }}
   {% endif %}
diff --git a/core/modules/comment/templates/comment.html.twig b/core/modules/comment/templates/comment.html.twig
index 5fca73b..a76cfb9 100644
--- a/core/modules/comment/templates/comment.html.twig
+++ b/core/modules/comment/templates/comment.html.twig
@@ -87,7 +87,7 @@
       for accessibility. The list is difficult to navigate in a screen
       reader without this information.
     #}
-    {% if parent %}
+    {% if parent is printable %}
       <p class="parent visually-hidden">{{ parent }}</p>
     {% endif %}
 
@@ -97,7 +97,7 @@
   <div{{ content_attributes }}>
     {{ content|without('links') }}
 
-    {% if signature %}
+    {% if signature is printable %}
       <div class="user-signature">
         {{ signature }}
       </div>
diff --git a/core/modules/datetime/templates/datetime-wrapper.html.twig b/core/modules/datetime/templates/datetime-wrapper.html.twig
index a4acf70..9263829 100644
--- a/core/modules/datetime/templates/datetime-wrapper.html.twig
+++ b/core/modules/datetime/templates/datetime-wrapper.html.twig
@@ -15,12 +15,12 @@
  * @ingroup themeable
  */
 #}
-{% if title %}
+{% if title is printable %}
   <h4 class="label">
     {% trans %}{{ title|passthrough }}{{ required|passthrough }}{% endtrans %}
   </h4>
 {% endif %}
 {{ content }}
-{% if description %}
+{% if description is printable %}
   <div class="description">{{ description }}</div>
 {% endif %}
diff --git a/core/modules/filter/templates/text-format-wrapper.html.twig b/core/modules/filter/templates/text-format-wrapper.html.twig
index f453971..f201187 100644
--- a/core/modules/filter/templates/text-format-wrapper.html.twig
+++ b/core/modules/filter/templates/text-format-wrapper.html.twig
@@ -12,7 +12,7 @@
 #}
 <div class="text-format-wrapper form-item">
   {{ children }}
-  {% if description %}
+  {% if description is printable %}
     <div class="description">{{ description }}</div>
   {% endif %}
 </div>
diff --git a/core/modules/forum/templates/forum-list.html.twig b/core/modules/forum/templates/forum-list.html.twig
index 5b41f6a..f8e4442 100644
--- a/core/modules/forum/templates/forum-list.html.twig
+++ b/core/modules/forum/templates/forum-list.html.twig
@@ -59,7 +59,7 @@
             <span class="visually-hidden">{{ forum.icon_title }}</span>
           </div>
           <div class="name"><a href="{{ forum.link }}">{{ forum.label }}</a></div>
-          {% if forum.description.value %}
+          {% if forum.description.value is printable %}
             <div class="description">{{ forum.description.value }}</div>
           {% endif %}
         {% for i in 1..forum.depth if forum.depth > 0 %}</div>{% endfor %}
diff --git a/core/modules/forum/templates/forum-submitted.html.twig b/core/modules/forum/templates/forum-submitted.html.twig
index f679363..31e148e 100644
--- a/core/modules/forum/templates/forum-submitted.html.twig
+++ b/core/modules/forum/templates/forum-submitted.html.twig
@@ -16,7 +16,7 @@
  * @ingroup themeable
  */
 #}
-{% if time %}
+{% if time is printable %}
   <span class="submitted">{% trans %}By {{ author|passthrough }} {{ time }} ago{% endtrans %}</span>
 {% else %}
   {{ 'n/a'|t }}
diff --git a/core/modules/link/templates/link-formatter-link-separate.html.twig b/core/modules/link/templates/link-formatter-link-separate.html.twig
index 16b91ed..0054f1b 100644
--- a/core/modules/link/templates/link-formatter-link-separate.html.twig
+++ b/core/modules/link/templates/link-formatter-link-separate.html.twig
@@ -16,7 +16,7 @@
 #}
 {% spaceless %}
   <div class="link-item">
-    {% if title %}
+    {% if title is printable %}
       <div class="link-title">{{ title }}</div>
     {% endif %}
     <div class="link-url">{{ link }}</div>
diff --git a/core/modules/locale/templates/locale-translation-update-info.html.twig b/core/modules/locale/templates/locale-translation-update-info.html.twig
index 809028a..9f41de1 100644
--- a/core/modules/locale/templates/locale-translation-update-info.html.twig
+++ b/core/modules/locale/templates/locale-translation-update-info.html.twig
@@ -23,10 +23,10 @@
   {% if modules %}
     {% set module_list = modules|join(', ') %}
     <span class="text">{% trans %}Updates for: {{ module_list }}{% endtrans %}</span>
-  {% elseif missing_updates_status %}
+  {% elseif missing_updates_status is printable %}
     <span class="text">{{ missing_updates_status }}</span>
   {% endif %}
-  {% if details %}
+  {% if details is printable %}
     <div class="details">{{ details }}</div>
   {% endif %}
 </div>
diff --git a/core/modules/search/templates/search-result.html.twig b/core/modules/search/templates/search-result.html.twig
index 732489b..65f8648 100644
--- a/core/modules/search/templates/search-result.html.twig
+++ b/core/modules/search/templates/search-result.html.twig
@@ -64,10 +64,10 @@
 </h3>
 {{ title_suffix }}
 <div class="search-snippet-info">
-  {% if snippet %}
+  {% if snippet is printable %}
     <p class="search-snippet"{{ content_attributes }}>{{ snippet }}</p>
   {% endif %}
-  {% if info %}
+  {% if info is printable %}
     <p class="search-info">{{ info }}</p>
   {% endif %}
 </div>
diff --git a/core/modules/system/templates/admin-block-content.html.twig b/core/modules/system/templates/admin-block-content.html.twig
index a49bf10..6efbd36 100644
--- a/core/modules/system/templates/admin-block-content.html.twig
+++ b/core/modules/system/templates/admin-block-content.html.twig
@@ -19,7 +19,7 @@
   <dl{{ attributes }}>
     {% for item in content %}
       <dt>{{ item.link }}</dt>
-      {% if item.description %}
+      {% if item.description is printable %}
         <dd>{{ item.description }}</dd>
       {% endif %}
     {% endfor %}
diff --git a/core/modules/system/templates/admin-block.html.twig b/core/modules/system/templates/admin-block.html.twig
index 20aa000..e16592e 100644
--- a/core/modules/system/templates/admin-block.html.twig
+++ b/core/modules/system/templates/admin-block.html.twig
@@ -15,12 +15,12 @@
  */
 #}
 <div class="admin-panel">
-  {% if block.title %}
+  {% if block.title is printable %}
     <h3>{{ block.title }}</h3>
   {% endif %}
-  {% if block.content %}
+  {% if block.content is printable %}
     <div class="body">{{ block.content }}</div>
-  {% elseif block.description %}
+  {% elseif block.description is printable %}
     <div class="description">{{ block.description }}</div>
   {% endif %}
 </div>
diff --git a/core/modules/system/templates/block--system-branding-block.html.twig b/core/modules/system/templates/block--system-branding-block.html.twig
index 2a12c7a..b623596 100644
--- a/core/modules/system/templates/block--system-branding-block.html.twig
+++ b/core/modules/system/templates/block--system-branding-block.html.twig
@@ -21,12 +21,12 @@
       <img src="{{ site_logo }}" alt="{{ 'Home'|t }}" />
     </a>
   {% endif %}
-  {% if site_name %}
+  {% if site_name is printable %}
     <div class="site-name">
       <a href="{{ url('<front>') }}" title="{{ 'Home'|t }}" rel="home">{{ site_name|e }}</a>
     </div>
   {% endif %}
-  {% if site_slogan %}
+  {% if site_slogan is printable %}
     <div class="site-slogan">{{ site_slogan }}</div>
   {% endif %}
 {% endblock %}
diff --git a/core/modules/system/templates/details.html.twig b/core/modules/system/templates/details.html.twig
index 17ea820..7fa9704 100644
--- a/core/modules/system/templates/details.html.twig
+++ b/core/modules/system/templates/details.html.twig
@@ -16,17 +16,17 @@
  */
 #}
 <details{{ attributes }}>
-  {%- if title -%}
+  {%- if title is printable -%}
     <summary{{ summary_attributes }}>{{ title }}</summary>
   {%- endif -%}
   <div class="details-wrapper">
-    {%- if description -%}
+    {%- if description is printable -%}
       <div class="details-description">{{ description }}</div>
     {%- endif -%}
-    {%- if children -%}
+    {%- if children is printable -%}
       {{ children }}
     {%- endif -%}
-    {%- if value -%}
+    {%- if value is printable -%}
       {{ value }}
     {%- endif -%}
   </div>
diff --git a/core/modules/system/templates/dropbutton-wrapper.html.twig b/core/modules/system/templates/dropbutton-wrapper.html.twig
index ca0ff7e..c773d15 100644
--- a/core/modules/system/templates/dropbutton-wrapper.html.twig
+++ b/core/modules/system/templates/dropbutton-wrapper.html.twig
@@ -12,7 +12,7 @@
  * @ingroup themeable
  */
 #}
-{% if children %}
+{% if children is printable %}
   {% spaceless %}
     <div class="dropbutton-wrapper">
       <div class="dropbutton-widget">
diff --git a/core/modules/system/templates/fieldset.html.twig b/core/modules/system/templates/fieldset.html.twig
index 9e4fe68..1552c28 100644
--- a/core/modules/system/templates/fieldset.html.twig
+++ b/core/modules/system/templates/fieldset.html.twig
@@ -28,14 +28,14 @@
     <legend{{ legend.attributes }}><span class="fieldset-legend">{{ legend.title }}{{ required }}</span></legend>
   {%- endif %}
   <div class="fieldset-wrapper">
-    {% if prefix %}
+    {% if prefix is printable %}
       <span class="field-prefix">{{ prefix }}</span>
     {% endif %}
     {{ children }}
-    {% if suffix %}
+    {% if suffix is printable %}
       <span class="field-suffix">{{ suffix }}</span>
     {% endif %}
-    {% if description.content %}
+    {% if description.content is printable %}
       <div{{ description.attributes }}>{{ description.content }}</div>
     {% endif %}
   </div>
diff --git a/core/modules/system/templates/form-element.html.twig b/core/modules/system/templates/form-element.html.twig
index ea4d90f..9078b49 100644
--- a/core/modules/system/templates/form-element.html.twig
+++ b/core/modules/system/templates/form-element.html.twig
@@ -50,7 +50,7 @@
   {% if label_display == 'after' %}
     {{ label }}
   {% endif %}
-  {% if description.content %}
+  {% if description.content is printable %}
     <div{{ description.attributes }}>
       {{ description.content }}
     </div>
diff --git a/core/modules/system/templates/install-page.html.twig b/core/modules/system/templates/install-page.html.twig
index 031013e..78e8448 100644
--- a/core/modules/system/templates/install-page.html.twig
+++ b/core/modules/system/templates/install-page.html.twig
@@ -24,12 +24,12 @@
   <div class="l-container">
 
     <header role="banner">
-      {% if site_name or site_slogan %}
+      {% if site_name is printable or site_slogan is printable %}
         <div class="name-and-slogan">
-          {% if site_name %}
+          {% if site_name is printable %}
             <h1>{{ site_name }}</h1>
           {% endif %}
-          {% if site_slogan %}
+          {% if site_slogan is printable %}
             <div class="site-slogan">{{ site_slogan }}</div>
           {% endif %}
         </div>{# /.name-and-slogan #}
@@ -37,26 +37,26 @@
     </header>
 
     <main role="main">
-      {% if title %}
+      {% if title is printable %}
         <h1>{{ title }}</h1>
       {% endif %}
       {{ messages }}
       {{ content }}
     </main>
 
-    {% if sidebar_first %}
+    {% if sidebar_first is printable %}
       <aside class="l-sidebar-first" role="complementary">
         {{ sidebar_first }}
       </aside>{# /.l-sidebar-first #}
     {% endif %}
 
-    {% if sidebar_second %}
+    {% if sidebar_second is printable %}
       <aside class="l-sidebar-second" role="complementary">
         {{ sidebar_second }}
       </aside>{# /.l-sidebar-second #}
     {% endif %}
 
-    {% if footer %}
+    {% if footer is printable %}
       <footer role="contentinfo">
         {{ footer }}
       </footer>
diff --git a/core/modules/system/templates/item-list.html.twig b/core/modules/system/templates/item-list.html.twig
index e8d16e0..936d348 100644
--- a/core/modules/system/templates/item-list.html.twig
+++ b/core/modules/system/templates/item-list.html.twig
@@ -18,12 +18,12 @@
  * @ingroup themeable
  */
 #}
-{%- if items or empty -%}
+{%- if items is printable or empty is printable -%}
   <div class="item-list">
-    {%- if title -%}
+    {%- if title is printable -%}
       <h3>{{ title }}</h3>
     {%- endif -%}
-    {%- if items -%}
+    {%- if items is printable -%}
       <{{ list_type }}{{ attributes }}>
         {%- for item in items -%}
           <li{{ item.attributes }}>{{ item.value }}</li>
diff --git a/core/modules/system/templates/links.html.twig b/core/modules/system/templates/links.html.twig
index 65d87c2..f3de7f1 100644
--- a/core/modules/system/templates/links.html.twig
+++ b/core/modules/system/templates/links.html.twig
@@ -46,7 +46,7 @@
   <ul{{ attributes }}>
     {%- for item in links -%}
       <li{{ item.attributes }}>
-        {%- if item.link -%}
+        {%- if item.link is printable -%}
           {{ item.link }}
         {%- elseif item.text_attributes -%}
           <span{{ item.text_attributes }}>{{ item.text }}</span>
diff --git a/core/modules/system/templates/maintenance-page.html.twig b/core/modules/system/templates/maintenance-page.html.twig
index b5275c7..9d9978b 100644
--- a/core/modules/system/templates/maintenance-page.html.twig
+++ b/core/modules/system/templates/maintenance-page.html.twig
@@ -30,15 +30,15 @@
       </a>
     {% endif %}
 
-    {% if site_name or site_slogan %}
+    {% if site_name is printable or site_slogan is printable %}
       <div class="name-and-slogan">
-        {% if site_name %}
+        {% if site_name is printable %}
          <h1 class="site-name">
            <a href="{{ front_page }}" title="{{ 'Home'|t }}" rel="home">{{ site_name }}</a>
          </h1>
         {% endif %}
 
-        {% if site_slogan %}
+        {% if site_slogan is printable %}
           <div class="site-slogan">{{ site_slogan }}</div>
         {% endif %}
       </div>{# /.name-and-slogan #}
@@ -47,7 +47,7 @@
   </header>
 
   <main role="main">
-    {% if title %}
+    {% if title is printable %}
       <h1>{{ title }}</h1>
     {% endif %}
 
@@ -56,19 +56,19 @@
     {{ content }}
   </main>
 
-  {% if page.sidebar_first %}
+  {% if page.sidebar_first is printable %}
     <aside class="l-sidebar-first" role="complementary">
       {{ page.sidebar_first }}
     </aside>{# /.l-sidebar-first #}
   {% endif %}
 
-  {% if page.sidebar_second %}
+  {% if page.sidebar_second is printable %}
     <aside class="l-sidebar-second" role="complementary">
       {{ page.sidebar_second }}
     </aside>{# /.l-sidebar-second #}
   {% endif %}
 
-  {% if page.footer %}
+  {% if page.footer is printable %}
     <footer role="contentinfo">
       {{ page.footer }}
     </footer>
diff --git a/core/modules/system/templates/page.html.twig b/core/modules/system/templates/page.html.twig
index 1f6f916..31745cd 100644
--- a/core/modules/system/templates/page.html.twig
+++ b/core/modules/system/templates/page.html.twig
@@ -72,11 +72,11 @@
       </a>
     {% endif %}
 
-    {% if site_name or site_slogan %}
+    {% if site_name is printable or site_slogan is printable %}
       <div class="name-and-slogan">
 
         {# Use h1 when the content title is empty #}
-        {% if title %}
+        {% if title is printable %}
           <strong class="site-name">
             <a href="{{ front_page }}" title="{{ 'Home'|t }}" rel="home">{{ site_name }}</a>
           </strong>
@@ -86,7 +86,7 @@
           </h1>
         {% endif %}
 
-        {% if site_slogan %}
+        {% if site_slogan is printable %}
           <div class="site-slogan">{{ site_slogan }}</div>
         {% endif %}
       </div>{# ./name-and-slogan #}
@@ -95,7 +95,7 @@
     {{ page.header }}
   </header>
 
-  {% if main_menu or secondary_menu %}
+  {% if main_menu is printable or secondary_menu is printable %}
     <nav role="navigation">
       {{ main_menu }}
       {{ secondary_menu }}
@@ -115,14 +115,14 @@
       {{ page.highlighted }}
 
       {{ title_prefix }}
-      {% if title %}
+      {% if title is printable %}
         <h1>{{ title }}</h1>
       {% endif %}
       {{ title_suffix }}
 
       {{ tabs }}
 
-      {% if action_links %}
+      {% if action_links is printable %}
         <nav class="action-links">{{ action_links }}</nav>
       {% endif %}
 
@@ -131,13 +131,13 @@
       {{ feed_icons }}
     </div>{# /.l-content #}
 
-    {% if page.sidebar_first %}
+    {% if page.sidebar_first is printable %}
       <aside class="l-sidebar-first" role="complementary">
         {{ page.sidebar_first }}
       </aside>
     {% endif %}
 
-    {% if page.sidebar_second %}
+    {% if page.sidebar_second is printable %}
       <aside class="l-sidebar-second" role="complementary">
         {{ page.sidebar_second }}
       </aside>
@@ -145,7 +145,7 @@
 
   </main>
 
-  {% if page.footer %}
+  {% if page.footer is printable %}
     <footer role="contentinfo">
       {{ page.footer }}
     </footer>
diff --git a/core/modules/system/templates/pager.html.twig b/core/modules/system/templates/pager.html.twig
index 47b20a7..b13cdb4 100644
--- a/core/modules/system/templates/pager.html.twig
+++ b/core/modules/system/templates/pager.html.twig
@@ -11,7 +11,7 @@
  * @ingroup themeable
  */
 #}
-{% if items %}
+{% if items is printable %}
   <h2 class="visually-hidden">{{ 'Pages'|t }}</h2>
   {{ items }}
 {% endif %}
diff --git a/core/modules/system/templates/progress-bar.html.twig b/core/modules/system/templates/progress-bar.html.twig
index 885a80f..190c51e 100644
--- a/core/modules/system/templates/progress-bar.html.twig
+++ b/core/modules/system/templates/progress-bar.html.twig
@@ -14,7 +14,7 @@
  */
 #}
 <div class="progress" data-drupal-progress>
-  {% if label %}
+  {% if label is printable %}
     <div class="progress__label">{{ label }}</div>
   {% endif %}
   <div class="progress__track"><div class="progress__bar" style="width: {{ percent }}%"></div></div>
diff --git a/core/modules/system/templates/region.html.twig b/core/modules/system/templates/region.html.twig
index 9213e02..d7f96c3 100644
--- a/core/modules/system/templates/region.html.twig
+++ b/core/modules/system/templates/region.html.twig
@@ -20,7 +20,7 @@
  * @ingroup themeable
  */
 #}
-{% if content %}
+{% if content is printable %}
   <div{{ attributes }}>
     {{ content }}
   </div>
diff --git a/core/modules/system/templates/status-messages.html.twig b/core/modules/system/templates/status-messages.html.twig
index 505eb20..e75acde 100644
--- a/core/modules/system/templates/status-messages.html.twig
+++ b/core/modules/system/templates/status-messages.html.twig
@@ -28,7 +28,7 @@
     {% if type == 'error' %}
       <div role="alert">
     {% endif %}
-      {% if status_headings[type] %}
+      {% if status_headings[type] is printable %}
         <h2 class="visually-hidden">{{ status_headings[type] }}</h2>
       {% endif %}
       {% if messages|length > 1 %}
diff --git a/core/modules/system/templates/status-report.html.twig b/core/modules/system/templates/status-report.html.twig
index d01f163..1c66a95 100644
--- a/core/modules/system/templates/status-report.html.twig
+++ b/core/modules/system/templates/status-report.html.twig
@@ -33,7 +33,7 @@
       <td class="status-title">{{ requirement.title }}</td>
       <td class="status-value">
         {{ requirement.value }}
-        {% if requirement.description %}
+        {% if requirement.description is printable %}
           <div class="description">{{ requirement.description }}</div>
         {% endif %}
       </td>
diff --git a/core/modules/system/templates/system-themes-page.html.twig b/core/modules/system/templates/system-themes-page.html.twig
index 80089fd..da451fb 100644
--- a/core/modules/system/templates/system-themes-page.html.twig
+++ b/core/modules/system/templates/system-themes-page.html.twig
@@ -32,7 +32,7 @@
       <h2>{{ theme_group.title }}</h2>
       {% for theme in theme_group.themes %}
         <div{{ theme.attributes }}>
-          {% if theme.screenshot %}
+          {% if theme.screenshot is printable %}
             {{ theme.screenshot }}
           {% else %}
             <div class="no-screenshot">
diff --git a/core/modules/toolbar/templates/toolbar.html.twig b/core/modules/toolbar/templates/toolbar.html.twig
index bcd3364..855ab63 100644
--- a/core/modules/toolbar/templates/toolbar.html.twig
+++ b/core/modules/toolbar/templates/toolbar.html.twig
@@ -33,7 +33,7 @@
     {% spaceless %}
     <div{{ tray.attributes }}>
       <div class="toolbar-lining clearfix">
-        {% if tray.label %}
+        {% if tray.label is printable %}
           <h3 class="toolbar-tray-name visually-hidden">{{ tray.label }}</h3>
         {% endif %}
         {{ tray.links }}
diff --git a/core/modules/user/templates/user.html.twig b/core/modules/user/templates/user.html.twig
index 2f6f640..81a5410 100644
--- a/core/modules/user/templates/user.html.twig
+++ b/core/modules/user/templates/user.html.twig
@@ -24,7 +24,7 @@
  */
 #}
 <article{{ attributes }}>
-  {% if content %}
+  {% if content is printable %}
     {{- content -}}
   {% endif %}
 </article>
diff --git a/core/modules/views/templates/views-mini-pager.html.twig b/core/modules/views/templates/views-mini-pager.html.twig
index 5fd95dc..1eb19ac 100644
--- a/core/modules/views/templates/views-mini-pager.html.twig
+++ b/core/modules/views/templates/views-mini-pager.html.twig
@@ -11,7 +11,7 @@
  * @ingroup themeable
  */
 #}
-{% if items %}
+{% if items is printable %}
   <h2 class="visually-hidden">{{ 'Pages'|t }}</h2>
   {{ items }}
 {% endif %}
diff --git a/core/modules/views/templates/views-view-grid.html.twig b/core/modules/views/templates/views-view-grid.html.twig
index a5a813c..6ee2c5a 100644
--- a/core/modules/views/templates/views-view-grid.html.twig
+++ b/core/modules/views/templates/views-view-grid.html.twig
@@ -22,7 +22,7 @@
  * @ingroup themeable
  */
 #}
-{% if title %}
+{% if title is printable %}
   <h3>{{ title }}</h3>
 {% endif %}
 <div{{ attributes }}>
diff --git a/core/modules/views/templates/views-view-list.html.twig b/core/modules/views/templates/views-view-list.html.twig
index 8de787c..8d8ce0b 100644
--- a/core/modules/views/templates/views-view-list.html.twig
+++ b/core/modules/views/templates/views-view-list.html.twig
@@ -21,7 +21,7 @@
 {% if attributes -%}
   <div{{ attributes }}>
 {% endif %}
-  {% if title %}
+  {% if title is printable %}
     <h3>{{ title }}</h3>
   {% endif %}
 
diff --git a/core/modules/views/templates/views-view-summary-unformatted.html.twig b/core/modules/views/templates/views-view-summary-unformatted.html.twig
index 9120dd4..3404a1b 100644
--- a/core/modules/views/templates/views-view-summary-unformatted.html.twig
+++ b/core/modules/views/templates/views-view-summary-unformatted.html.twig
@@ -21,7 +21,7 @@
 #}
 {% for row in rows  %}
   {{ options.inline ? '<span' : '<div' }} class="views-summary views-summary-unformatted">
-  {% if row.separator -%}
+  {% if row.separator is printable -%}
     {{ row.separator }}
   {%- endif %}
   <a href="{{ row.url }}"{{ row.attributes }}>{{ row.link }}</a>
diff --git a/core/modules/views/templates/views-view-table.html.twig b/core/modules/views/templates/views-view-table.html.twig
index 6b0b26c..180c7c9 100644
--- a/core/modules/views/templates/views-view-table.html.twig
+++ b/core/modules/views/templates/views-view-table.html.twig
@@ -29,7 +29,7 @@
 <table{{ attributes }}>
   {% if caption_needed %}
     <caption>
-    {% if caption %}
+    {% if caption is printable %}
       {{ caption }}
     {% else %}
       {{ title }}
diff --git a/core/modules/views/templates/views-view-unformatted.html.twig b/core/modules/views/templates/views-view-unformatted.html.twig
index e3fb2e3..00fadf8 100644
--- a/core/modules/views/templates/views-view-unformatted.html.twig
+++ b/core/modules/views/templates/views-view-unformatted.html.twig
@@ -14,7 +14,7 @@
  * @ingroup themeable
  */
 #}
-{% if title %}
+{% if title is printable %}
   <h3>{{ title }}</h3>
 {% endif %}
 {% for row in rows %}
diff --git a/core/modules/views/templates/views-view.html.twig b/core/modules/views/templates/views-view.html.twig
index f839ef9..154564f 100644
--- a/core/modules/views/templates/views-view.html.twig
+++ b/core/modules/views/templates/views-view.html.twig
@@ -39,53 +39,53 @@
 #}
 <div{{ attributes }}>
   {{ title_prefix }}
-  {% if title %}
+  {% if title is printable %}
     {{ title }}
   {% endif %}
   {{ title_suffix }}
-  {% if header %}
+  {% if header is printable %}
     <div class="view-header">
       {{ header }}
     </div>
   {% endif %}
-  {% if exposed %}
+  {% if exposed is printable %}
     <div class="view-filters">
       {{ exposed }}
     </div>
   {% endif %}
-  {% if attachment_before %}
+  {% if attachment_before is printable %}
     <div class="attachment attachment-before">
       {{ attachment_before }}
     </div>
   {% endif %}
 
-  {% if rows %}
+  {% if rows is printable %}
     <div class="view-content">
       {{ rows }}
     </div>
-  {% elseif empty %}
+  {% elseif empty is printable %}
     <div class="view-empty">
       {{ empty }}
     </div>
   {% endif %}
 
-  {% if pager %}
+  {% if pager is printable %}
     {{ pager }}
   {% endif %}
-  {% if attachment_after %}
+  {% if attachment_after is printable %}
     <div class="attachment attachment-after">
       {{ attachment_after }}
     </div>
   {% endif %}
-  {% if more %}
+  {% if more is printable %}
     {{ more }}
   {% endif %}
-  {% if footer %}
+  {% if footer is printable %}
     <div class="view-footer">
       {{ footer }}
     </div>
   {% endif %}
-  {% if feed_icon %}
+  {% if feed_icon is printable %}
     <div class="feed-icon">
       {{ feed_icon }}
     </div>
diff --git a/core/modules/views/tests/modules/views_test_data/templates/views-view--frontpage.html.twig b/core/modules/views/tests/modules/views_test_data/templates/views-view--frontpage.html.twig
index 0ccf2da..7387c7d 100644
--- a/core/modules/views/tests/modules/views_test_data/templates/views-view--frontpage.html.twig
+++ b/core/modules/views/tests/modules/views_test_data/templates/views-view--frontpage.html.twig
@@ -38,49 +38,49 @@
  */
 #}
 <div{{ attributes }}>
-  {% if header %}
+  {% if header is printable %}
     <div class="view-header">
       {{ header }}
     </div>
   {% endif %}
-  {% if exposed %}
+  {% if exposed is printable %}
     <div class="view-filters">
       {{ exposed }}
     </div>
   {% endif %}
-  {% if attachment_before %}
+  {% if attachment_before is printable %}
     <div class="attachment attachment-before">
       {{ attachment_before }}
     </div>
   {% endif %}
 
-  {% if rows %}
+  {% if rows is printable %}
     <div class="view-content">
       {{ rows }}
     </div>
-  {% elseif empty %}
+  {% elseif empty is printable %}
     <div class="view-empty">
       {{ empty }}
     </div>
   {% endif %}
 
-  {% if pager %}
+  {% if pager is printable %}
     {{ pager }}
   {% endif %}
-  {% if attachment_after %}
+  {% if attachment_after is printable %}
     <div class="attachment attachment-after">
       {{ attachment_after }}
     </div>
   {% endif %}
-  {% if more %}
+  {% if more is printable %}
     {{ more }}
   {% endif %}
-  {% if footer %}
+  {% if footer is printable %}
     <div class="view-footer">
       {{ footer }}
     </div>
   {% endif %}
-  {% if feed_icon %}
+  {% if feed_icon is printable %}
     <div class="feed-icon">
       {{ feed_icon }}
     </div>
diff --git a/core/modules/views_ui/templates/views-ui-display-tab-bucket.html.twig b/core/modules/views_ui/templates/views-ui-display-tab-bucket.html.twig
index 50e925d..50c5596 100644
--- a/core/modules/views_ui/templates/views-ui-display-tab-bucket.html.twig
+++ b/core/modules/views_ui/templates/views-ui-display-tab-bucket.html.twig
@@ -15,11 +15,11 @@
  */
 #}
 <div{{ attributes }}>
-  {% if title -%}
+  {% if title is printable -%}
     <h3>{{ title }}</h3>
   {%- endif %}
   {{ content }}
-  {% if actions -%}
+  {% if actions is printable -%}
     {{ actions }}
   {%- endif %}
 </div>
diff --git a/core/modules/views_ui/templates/views-ui-display-tab-setting.html.twig b/core/modules/views_ui/templates/views-ui-display-tab-setting.html.twig
index 1c67469..9fa9223 100644
--- a/core/modules/views_ui/templates/views-ui-display-tab-setting.html.twig
+++ b/core/modules/views_ui/templates/views-ui-display-tab-setting.html.twig
@@ -16,7 +16,7 @@
  */
 #}
 <div{{ attributes }}>
-  {% if description -%}
+  {% if description is printable -%}
     <span class="label">{{ description }}</span>
   {%- endif %}
   {% if settings_links %}
diff --git a/core/modules/views_ui/templates/views-ui-view-preview-section.html.twig b/core/modules/views_ui/templates/views-ui-view-preview-section.html.twig
index cfc840f..b8e2af3 100644
--- a/core/modules/views_ui/templates/views-ui-view-preview-section.html.twig
+++ b/core/modules/views_ui/templates/views-ui-view-preview-section.html.twig
@@ -14,7 +14,7 @@
  */
 #}
 <h1 class="section-title">{{ title }}</h1>
-{% if links %}
+{% if links is printable %}
   <div class="contextual">{{ links }}</div>
 {% endif %}
 <div class="preview-section">{{ content }}</div>
diff --git a/core/themes/bartik/templates/block--system-branding-block.html.twig b/core/themes/bartik/templates/block--system-branding-block.html.twig
index c407fe3..f6bd56d 100644
--- a/core/themes/bartik/templates/block--system-branding-block.html.twig
+++ b/core/themes/bartik/templates/block--system-branding-block.html.twig
@@ -21,14 +21,14 @@
       <img src="{{ site_logo }}" alt="{{ 'Home'|t }}" />
     </a>
   {% endif %}
-  {% if site_name or site_slogan %}
+  {% if site_name is printable or site_slogan is printable %}
     <div class="site-branding-text">
-      {% if site_name %}
+      {% if site_name is printable %}
         <strong class="site-name">
           <a href="{{ url('<front>') }}" title="{{ 'Home'|t }}" rel="home">{{ site_name|e }}</a>
         </strong>
       {% endif %}
-      {% if site_slogan %}
+      {% if site_slogan is printable %}
         <div class="site-slogan">{{ site_slogan }}</div>
       {% endif %}
     </div>
diff --git a/core/themes/bartik/templates/comment.html.twig b/core/themes/bartik/templates/comment.html.twig
index b6d4bb9..d0c137d 100644
--- a/core/themes/bartik/templates/comment.html.twig
+++ b/core/themes/bartik/templates/comment.html.twig
@@ -85,7 +85,7 @@
           // for accessibility. The list is difficult to navigate in a screen
           // reader without this information.
         #}
-        {% if parent %}
+        {% if parent is printable %}
         <p class="comment-parent visually-hidden">
           {{ parent }}
         </p>
@@ -113,7 +113,7 @@
     </div> <!-- /.content -->
 
     <footer class="comment-footer">
-      {% if signature %}
+      {% if signature is printable %}
       <div class="user-signature clearfix">
         {{ signature }}
       </div>
diff --git a/core/themes/bartik/templates/maintenance-page.html.twig b/core/themes/bartik/templates/maintenance-page.html.twig
index b29cafa..8b9f65d 100644
--- a/core/themes/bartik/templates/maintenance-page.html.twig
+++ b/core/themes/bartik/templates/maintenance-page.html.twig
@@ -27,16 +27,16 @@
   <div id="page-wrapper"><div id="page">
 
     <header id="header" role="banner"><div class="section clearfix">
-      {% if site_name or site_slogan %}
+      {% if site_name is printable or site_slogan is printable %}
         <div id="name-and-slogan"{{ hide_site_name and hide_site_slogan ? ' class="visually-hidden"' }}>
-          {% if site_name %}
+          {% if site_name is printable %}
             <div id="site-name"{{ hide_site_name ? ' class="visually-hidden"' }}>
               <strong>
                 <a href="{{ front_page }}" title="{{ 'Home'|t }}" rel="home"><span>{{ site_name }}</span></a>
               </strong>
             </div>
           {% endif %}
-          {% if site_slogan %}
+          {% if site_slogan is printable %}
             <div id="site-slogan"{{ hide_site_slogan ? ' class="visually-hidden"' }}>
               {{ site_slogan }}
             </div>
@@ -48,9 +48,9 @@
     <div id="main-wrapper"><div id="main" class="clearfix">
       <main id="content" class="column" role="main"><section class="section">
         <a id="main-content"></a>
-        {% if title %}<h1 class="title" id="page-title">{{ title }}</h1>{% endif %}
+        {% if title is printable %}<h1 class="title" id="page-title">{{ title }}</h1>{% endif %}
         {{ content }}
-        {% if messages %}
+        {% if messages is printable %}
           <div id="messages"><div class="section clearfix">
             {{ messages }}
           </div></div> <!-- /.section, /#messages -->
diff --git a/core/themes/bartik/templates/node.html.twig b/core/themes/bartik/templates/node.html.twig
index e61bd9c..6a2db16 100644
--- a/core/themes/bartik/templates/node.html.twig
+++ b/core/themes/bartik/templates/node.html.twig
@@ -70,6 +70,7 @@
  *
  * @ingroup themeable
  */
+ var_dump($content);
 #}
 <article id="node-{{ node.id }}" class="{{ attributes.class}} clearfix"{{ attributes }} role="article">
 
@@ -94,7 +95,7 @@
     {{ content|without('links') }}
   </div>
 
-  {% if content.links %}
+  {% if content.links is printable %}
     <footer class="link-wrapper">
       {{ content.links }}
     </footer>
diff --git a/core/themes/bartik/templates/page.html.twig b/core/themes/bartik/templates/page.html.twig
index 5602997..3c5024e 100644
--- a/core/themes/bartik/templates/page.html.twig
+++ b/core/themes/bartik/templates/page.html.twig
@@ -82,7 +82,7 @@
 <div id="page-wrapper"><div id="page">
 
   <header id="header" class="{{ secondary_menu ? 'with-secondary-menu' : 'without-secondary-menu' }}" role="banner"><div class="section clearfix">
-   {% if secondary_menu %}
+   {% if secondary_menu is printable %}
       <nav id="secondary-menu" class="navigation" role="navigation">
         {{ secondary_menu }}
       </nav> <!-- /#secondary-menu -->
@@ -94,10 +94,10 @@
       </a>
     {% endif %}
 
-    {% if site_name or site_slogan %}
+    {% if site_name is printable or site_slogan is printable %}
       <div id="name-and-slogan"{% if hide_site_name and hide_site_slogan %} class="visually-hidden"{% endif %}>
-        {% if site_name %}
-          {% if title %}
+        {% if site_name is printable %}
+          {% if title is printable %}
             <div id="site-name"{% if hide_site_name %} class="visually-hidden"{% endif %}>
               <strong>
                 <a href="{{ front_page }}" title="{{ 'Home'|t }}" rel="home"><span>{{ site_name }}</span></a>
@@ -111,7 +111,7 @@
           {% endif %}
         {% endif %}
 
-        {% if site_slogan %}
+        {% if site_slogan is printable %}
           <div id="site-slogan"{% if hide_site_slogan %} class="visually-hidden"{% endif %}>
             {{ site_slogan }}
           </div>
@@ -121,20 +121,20 @@
 
     {{ page.header }}
 
-    {% if main_menu %}
+    {% if main_menu is printable %}
       <nav id ="main-menu" class="navigation" role="navigation">
         {{ main_menu }}
       </nav> <!-- /#main-menu -->
     {% endif %}
   </div></header> <!-- /.section, /#header-->
 
-  {% if messages %}
+  {% if messages is printable %}
     <div id="messages"><div class="section clearfix">
       {{ messages }}
     </div></div> <!-- /.section, /#messages -->
   {% endif %}
 
-  {% if page.featured %}
+  {% if page.featured is printable %}
     <aside id="featured"><div class="section clearfix">
       {{ page.featured }}
     </div></aside> <!-- /.section, /#featured -->
@@ -144,22 +144,22 @@
     {{ breadcrumb }}
 
     <main id="content" class="column" role="main"><section class="section">
-      {% if page.highlighted %}<div id="highlighted">{{ page.highlighted }}</div>{% endif %}
+      {% if page.highlighted is printable %}<div id="highlighted">{{ page.highlighted }}</div>{% endif %}
       <a id="main-content"></a>
       {{ title_prefix }}
-        {% if title %}
+        {% if title is printable %}
           <h1 class="title" id="page-title">
             {{ title }}
           </h1>
         {% endif %}
       {{ title_suffix }}
-        {% if tabs %}
+        {% if tabs is printable %}
           <nav class="tabs" role="navigation">
             {{ tabs }}
           </nav>
         {% endif %}
       {{ page.help }}
-        {% if action_links %}
+        {% if action_links is printable %}
           <ul class="action-links">
             {{ action_links }}
           </ul>
@@ -168,13 +168,13 @@
       {{ feed_icons }}
     </section></main> <!-- /.section, /#content -->
 
-    {% if page.sidebar_first %}
+    {% if page.sidebar_first is printable %}
       <div id="sidebar-first" class="column sidebar"><aside class="section">
         {{ page.sidebar_first }}
       </aside></div><!-- /.section, /#sidebar-first -->
     {% endif %}
 
-    {% if page.sidebar_second %}
+    {% if page.sidebar_second is printable %}
       <div id="sidebar-second" class="column sidebar"><aside class="section">
         {{ page.sidebar_second }}
       </aside></div><!-- /.section, /#sidebar-second -->
@@ -182,7 +182,7 @@
 
   </div></div><!-- /#main, /#main-wrapper -->
 
-  {% if page.triptych_first or page.triptych_middle or page.triptych_last %}
+  {% if page.triptych_first is printable or page.triptych_middle is printable or page.triptych_last is printable %}
     <div id="triptych-wrapper"><aside id="triptych" class="clearfix">
       {{ page.triptych_first }}
       {{ page.triptych_middle }}
@@ -192,7 +192,7 @@
 
   <div id="footer-wrapper"><footer class="section">
 
-    {% if page.footer_firstcolumn or page.footer_secondcolumn or page.footer_thirdcolumn or page.footer_fourthcolumn %}
+    {% if page.footer_firstcolumn is printable or page.footer_secondcolumn is printable or page.footer_thirdcolumn is printable or page.footer_fourthcolumn is printable %}
       <div id="footer-columns" class="clearfix">
         {{ page.footer_firstcolumn }}
         {{ page.footer_secondcolumn }}
@@ -201,7 +201,7 @@
       </div><!-- /#footer-columns -->
     {% endif %}
 
-    {% if page.footer %}
+    {% if page.footer is printable %}
       <div id="footer" role="contentinfo" class="clearfix">
         {{ page.footer }}
       </div> <!-- /#footer -->
diff --git a/core/themes/engines/twig/twig.engine b/core/themes/engines/twig/twig.engine
index 74de2b8..34de428 100644
--- a/core/themes/engines/twig/twig.engine
+++ b/core/themes/engines/twig/twig.engine
@@ -173,4 +173,4 @@ function twig_without($element) {
     }
   }
   return $filtered_element;
-}
+}
\ No newline at end of file
diff --git a/core/themes/seven/templates/install-page.html.twig b/core/themes/seven/templates/install-page.html.twig
index 81ddece..810a78b 100644
--- a/core/themes/seven/templates/install-page.html.twig
+++ b/core/themes/seven/templates/install-page.html.twig
@@ -25,39 +25,39 @@
 <div class="l-container">
 
   <header role="banner">
-    {% if site_name or site_slogan %}
+    {% if site_name is printable or site_slogan is printable %}
       <div class="name-and-slogan">
-        {% if site_name %}
+        {% if site_name is printable %}
           <h1>{{ site_name }}</h1>
         {% endif %}
-        {% if site_slogan %}
+        {% if site_slogan is printable %}
           <div class="site-slogan">{{ site_slogan }}</div>
         {% endif %}
       </div>{# /.name-and-slogan #}
     {% endif %}
   </header>
 
-  {% if sidebar_first %}
+  {% if sidebar_first is printable %}
     <aside class="l-sidebar-first" role="complementary">
       {{ sidebar_first }}
     </aside>{# /.l-sidebar-first #}
   {% endif %}
 
   <main role="main">
-    {% if title %}
+    {% if title is printable %}
       <h1>{{ title }}</h1>
     {% endif %}
     {{ messages }}
     {{ content }}
   </main>
 
-  {% if sidebar_second %}
+  {% if sidebar_second is printable %}
     <aside class="l-sidebar-second" role="complementary">
       {{ sidebar_second }}
     </aside>{# /.l-sidebar-second #}
   {% endif %}
 
-  {% if footer %}
+  {% if footer is printable %}
     <footer role="contentinfo">
       {{ footer }}
     </footer>
diff --git a/core/themes/seven/templates/maintenance-page.html.twig b/core/themes/seven/templates/maintenance-page.html.twig
index dc691c1..0d28caa 100644
--- a/core/themes/seven/templates/maintenance-page.html.twig
+++ b/core/themes/seven/templates/maintenance-page.html.twig
@@ -25,7 +25,7 @@
 
   <header id="branding">
     <div class="branding__inner">
-      {% if title %}<h1 class="page-title">{{ title }}</h1>{% endif %}
+      {% if title is printable %}<h1 class="page-title">{{ title }}</h1>{% endif %}
     </div>
   </header>
 
@@ -38,10 +38,10 @@
     </div>
 
     <main id="content" class="clearfix">
-      {% if messages %}
+      {% if messages is printable %}
         <div id="console">{{ messages }}</div>
       {% endif %}
-      {% if help %}
+      {% if help is printable %}
         <div id="help">
           {{ help }}
         </div>
diff --git a/core/themes/seven/templates/page.html.twig b/core/themes/seven/templates/page.html.twig
index 77dde87..62b9c53 100644
--- a/core/themes/seven/templates/page.html.twig
+++ b/core/themes/seven/templates/page.html.twig
@@ -68,18 +68,18 @@
   <header id="branding" class="clearfix">
     <div class="branding__inner">
       {{ title_prefix }}
-      {% if title %}
+      {% if title is printable %}
         <h1 class="page-title">{{ title }}</h1>
       {% endif %}
       {{ title_suffix }}
-      {% if primary_local_tasks %}
+      {% if primary_local_tasks is printable %}
         {{ primary_local_tasks }}
       {% endif %}
     </div>
   </header>
 
   <div id="page">
-    {% if secondary_local_tasks %}
+    {% if secondary_local_tasks is printable %}
       <div class="tabs-secondary clearfix" role="navigation">{{ secondary_local_tasks }}</div>
     {% endif %}
 
@@ -87,15 +87,15 @@
 
     <main id="content" class="clearfix" role="main">
       <div class="visually-hidden"><a id="main-content"></a></div>
-      {% if messages %}
+      {% if messages is printable %}
         <div id="console" class="clearfix">{{ messages }}</div>
       {% endif %}
-      {% if page.help %}
+      {% if page.help is printable %}
         <div id="help">
           {{ page.help }}
         </div>
       {% endif %}
-      {% if action_links %}
+      {% if action_links is printable %}
         <ul class="action-links">
           {{ action_links }}
         </ul>