diff --git a/core/includes/common.inc b/core/includes/common.inc
index 11f8a9d..d04ac66 100644
--- a/core/includes/common.inc
+++ b/core/includes/common.inc
@@ -33,6 +33,7 @@
 use Drupal\Core\Template\Attribute;
 use Drupal\Core\Render\Element;
 use Drupal\Core\Session\AnonymousUserSession;
+use Drupal\Core\Template\AttachmentManager;
 
 /**
  * @defgroup php_wrappers PHP wrapper functions
@@ -1670,6 +1671,12 @@ function drupal_process_attached(array $elements, $dependency_check = FALSE) {
     'library' => array(),
   );
 
+  // Check for attachments added from a template.
+  if ($template_attachments = AttachmentManager::getAttachments('library')) {
+    $elements['#attached']['library'] = array_merge($elements['#attached']['library'], $template_attachments);
+    AttachmentManager::clearAttachments('library');
+  }
+
   // Add the libraries first.
   $success = TRUE;
   foreach ($elements['#attached']['library'] as $library) {
diff --git a/core/lib/Drupal/Core/Template/AttachmentManager.php b/core/lib/Drupal/Core/Template/AttachmentManager.php
new file mode 100644
index 0000000..fe4814a
--- /dev/null
+++ b/core/lib/Drupal/Core/Template/AttachmentManager.php
@@ -0,0 +1,57 @@
+<?php
+/**
+ * Contains \Drupal\Core\Template\AttachmentManager.
+ */
+
+namespace Drupal\Core\Template;
+
+/**
+ * Manages page attachments.
+ */
+class AttachmentManager {
+
+  /**
+   * Stores page attachments.
+   *
+   * @var array
+   */
+  protected static $attachments;
+
+  /**
+   * Gets the page attachments.
+   *
+   * @param string $type
+   *   The attachment type.
+   *
+   * @return array
+   *   The page attachments.
+   */
+  public static function getAttachments($type = 'library') {
+    return isset(static::$attachments[$type]) ? static::$attachments[$type] : array();
+  }
+
+  /**
+   * Adds page attachments.
+   *
+   * @param mixed $attachments
+   *   An array of attachment names or an attachment name.
+   * @param string $type
+   *   The attachment type.
+   */
+  public static function addAttachments($attachments, $type = 'library') {
+    if (!is_array(static::$attachments[$type])) {
+      static::clearAttachments($type);
+    }
+    static::$attachments[$type] = array_merge(static::$attachments[$type], (array) $attachments);
+  }
+
+  /**
+   * Clears page attachments.
+   *
+   * @param string $type
+   *   The attachment type.
+   */
+  public static function clearAttachments($type = 'library') {
+    static::$attachments[$type] = [];
+  }
+}
diff --git a/core/lib/Drupal/Core/Template/TwigExtension.php b/core/lib/Drupal/Core/Template/TwigExtension.php
index 511cefb..fa68fe5 100644
--- a/core/lib/Drupal/Core/Template/TwigExtension.php
+++ b/core/lib/Drupal/Core/Template/TwigExtension.php
@@ -15,6 +15,7 @@
 use Drupal\Core\Routing\UrlGeneratorInterface;
 use Drupal\Core\Url;
 use Drupal\Core\Utility\LinkGeneratorInterface;
+use Drupal\Core\Template\AttachmentManager;
 
 /**
  * A class providing Drupal Twig extensions.
@@ -76,6 +77,7 @@ public function getFunctions() {
       new \Twig_SimpleFunction('path', array($this, 'getPath'), array('is_safe_callback' => array($this, 'isUrlGenerationSafe'))),
       new \Twig_SimpleFunction('url_from_path', array($this, 'getUrlFromPath'), array('is_safe_callback' => array($this, 'isUrlGenerationSafe'))),
       new \Twig_SimpleFunction('link', array($this, 'getLink')),
+      new \Twig_SimpleFunction('addLib', array($this, 'addLibraries')),
     );
   }
 
@@ -254,4 +256,14 @@ public function isUrlGenerationSafe(\Twig_Node $args_node) {
     return array();
   }
 
+  /**
+   * Adds libraries to the page.
+   *
+   * @param array $libraries
+   *   An array of libraries.
+   */
+  public function addLibraries($libraries = array()) {
+    AttachmentManager::addAttachments($libraries, 'library');
+  }
+
 }
diff --git a/core/tests/Drupal/Tests/Core/Template/AttachmentManagerTest.php b/core/tests/Drupal/Tests/Core/Template/AttachmentManagerTest.php
new file mode 100644
index 0000000..da8c32a
--- /dev/null
+++ b/core/tests/Drupal/Tests/Core/Template/AttachmentManagerTest.php
@@ -0,0 +1,43 @@
+<?php
+
+/**
+ * @file
+ * Contains \Drupal\Tests\Core\Template\AttachmentManagerTest.
+ */
+
+namespace Drupal\Tests\Core\Template;
+
+use Drupal\Core\Template\AttachmentManager;
+use Drupal\Tests\UnitTestCase;
+
+/**
+ * @coversDefaultClass \Drupal\Core\Template\AttachmentManager
+ * @group Template
+ */
+class AttachmentManagerTest extends UnitTestCase {
+
+  /**
+   * Tests the static functions.
+   */
+  public function testStatics() {
+    $result = AttachmentManager::getAttachments();
+    $this->assertArrayEquals(array(), $result);
+    $attachments = array(
+      'special-css-library-1',
+      'special-js-library-1',
+    );
+    AttachmentManager::addAttachments($attachments);
+    $result = AttachmentManager::getAttachments();
+    $this->assertTrue(in_array($attachments[0], $result));
+    $this->assertTrue(in_array($attachments[1], $result));
+    $new_attachment = 'new-css-library';
+    AttachmentManager::addAttachments($new_attachment);
+    $result = AttachmentManager::getAttachments();
+    $this->assertTrue(in_array($new_attachment, $result));
+    $this->assertEquals(3, count($result));
+    AttachmentManager::clearAttachments();
+    $result = AttachmentManager::getAttachments();
+    $this->assertArrayEquals(array(), $result);
+  }
+
+}