diff --git a/core/misc/dialog/dialog.ajax.js b/core/assets/components/dialog/dialog.ajax.js
similarity index 100%
rename from core/misc/dialog/dialog.ajax.js
rename to core/assets/components/dialog/dialog.ajax.js
diff --git a/core/misc/dialog/dialog.jquery-ui.js b/core/assets/components/dialog/dialog.jquery-ui.js
similarity index 100%
rename from core/misc/dialog/dialog.jquery-ui.js
rename to core/assets/components/dialog/dialog.jquery-ui.js
diff --git a/core/misc/dialog/dialog.js b/core/assets/components/dialog/dialog.js
similarity index 100%
rename from core/misc/dialog/dialog.js
rename to core/assets/components/dialog/dialog.js
diff --git a/core/misc/dialog/dialog.position.js b/core/assets/components/dialog/dialog.position.js
similarity index 100%
rename from core/misc/dialog/dialog.position.js
rename to core/assets/components/dialog/dialog.position.js
diff --git a/core/misc/dialog.theme.css b/core/assets/components/dialog/dialog.theme.css
similarity index 100%
rename from core/misc/dialog.theme.css
rename to core/assets/components/dialog/dialog.theme.css
diff --git a/core/misc/dropbutton/dropbutton.css b/core/assets/components/dropbutton/dropbutton.css
similarity index 100%
rename from core/misc/dropbutton/dropbutton.css
rename to core/assets/components/dropbutton/dropbutton.css
diff --git a/core/misc/dropbutton/dropbutton.js b/core/assets/components/dropbutton/dropbutton.js
similarity index 100%
rename from core/misc/dropbutton/dropbutton.js
rename to core/assets/components/dropbutton/dropbutton.js
diff --git a/core/misc/dropbutton/dropbutton.theme.css b/core/assets/components/dropbutton/dropbutton.theme.css
similarity index 100%
rename from core/misc/dropbutton/dropbutton.theme.css
rename to core/assets/components/dropbutton/dropbutton.theme.css
diff --git a/core/misc/print.css b/core/assets/css/print.css
similarity index 100%
rename from core/misc/print.css
rename to core/assets/css/print.css
diff --git a/core/misc/vertical-tabs.css b/core/assets/css/vertical-tabs.css
similarity index 100%
rename from core/misc/vertical-tabs.css
rename to core/assets/css/vertical-tabs.css
diff --git a/core/misc/active-link.js b/core/assets/js/active-link.js
similarity index 100%
rename from core/misc/active-link.js
rename to core/assets/js/active-link.js
diff --git a/core/misc/ajax.js b/core/assets/js/ajax.js
similarity index 100%
rename from core/misc/ajax.js
rename to core/assets/js/ajax.js
diff --git a/core/misc/announce.js b/core/assets/js/announce.js
similarity index 100%
rename from core/misc/announce.js
rename to core/assets/js/announce.js
diff --git a/core/misc/autocomplete.js b/core/assets/js/autocomplete.js
similarity index 100%
rename from core/misc/autocomplete.js
rename to core/assets/js/autocomplete.js
diff --git a/core/misc/batch.js b/core/assets/js/batch.js
similarity index 100%
rename from core/misc/batch.js
rename to core/assets/js/batch.js
diff --git a/core/misc/collapse.js b/core/assets/js/collapse.js
similarity index 100%
rename from core/misc/collapse.js
rename to core/assets/js/collapse.js
diff --git a/core/misc/debounce.js b/core/assets/js/debounce.js
similarity index 100%
rename from core/misc/debounce.js
rename to core/assets/js/debounce.js
diff --git a/core/misc/displace.js b/core/assets/js/displace.js
similarity index 100%
rename from core/misc/displace.js
rename to core/assets/js/displace.js
diff --git a/core/misc/form.js b/core/assets/js/form.js
similarity index 100%
rename from core/misc/form.js
rename to core/assets/js/form.js
diff --git a/core/misc/jquery.intrinsic.js b/core/assets/js/jquery.intrinsic.js
similarity index 100%
rename from core/misc/jquery.intrinsic.js
rename to core/assets/js/jquery.intrinsic.js
diff --git a/core/misc/machine-name.js b/core/assets/js/machine-name.js
similarity index 100%
rename from core/misc/machine-name.js
rename to core/assets/js/machine-name.js
diff --git a/core/misc/progress.js b/core/assets/js/progress.js
similarity index 100%
rename from core/misc/progress.js
rename to core/assets/js/progress.js
diff --git a/core/misc/states.js b/core/assets/js/states.js
similarity index 100%
rename from core/misc/states.js
rename to core/assets/js/states.js
diff --git a/core/misc/tabbingmanager.js b/core/assets/js/tabbingmanager.js
similarity index 100%
rename from core/misc/tabbingmanager.js
rename to core/assets/js/tabbingmanager.js
diff --git a/core/misc/tabledrag.js b/core/assets/js/tabledrag.js
similarity index 100%
rename from core/misc/tabledrag.js
rename to core/assets/js/tabledrag.js
diff --git a/core/misc/tableheader.js b/core/assets/js/tableheader.js
similarity index 100%
rename from core/misc/tableheader.js
rename to core/assets/js/tableheader.js
diff --git a/core/misc/tableresponsive.js b/core/assets/js/tableresponsive.js
similarity index 100%
rename from core/misc/tableresponsive.js
rename to core/assets/js/tableresponsive.js
diff --git a/core/misc/tableselect.js b/core/assets/js/tableselect.js
similarity index 100%
rename from core/misc/tableselect.js
rename to core/assets/js/tableselect.js
diff --git a/core/misc/timezone.js b/core/assets/js/timezone.js
similarity index 100%
rename from core/misc/timezone.js
rename to core/assets/js/timezone.js
diff --git a/core/misc/vertical-tabs.js b/core/assets/js/vertical-tabs.js
similarity index 100%
rename from core/misc/vertical-tabs.js
rename to core/assets/js/vertical-tabs.js
diff --git a/core/core.libraries.yml b/core/core.libraries.yml
index 1a36202..236eec2 100644
--- a/core/core.libraries.yml
+++ b/core/core.libraries.yml
@@ -67,7 +67,7 @@ drupalSettings:
 drupal.active-link:
   version: VERSION
   js:
-    misc/active-link.js: {}
+    assets/js/active-link.js: {}
   dependencies:
     - core/drupal
     - core/drupalSettings
@@ -76,7 +76,7 @@ drupal.active-link:
 drupal.ajax:
   version: VERSION
   js:
-    misc/ajax.js: {}
+    assets/js/ajax.js: {}
   dependencies:
     - core/jquery
     - core/drupal
@@ -87,7 +87,7 @@ drupal.ajax:
 drupal.announce:
   version: VERSION
   js:
-    misc/announce.js: {}
+    assets/js/announce.js: {}
   dependencies:
     - core/drupal
     - core/drupal.debounce
@@ -95,7 +95,7 @@ drupal.announce:
 drupal.autocomplete:
   version: VERSION
   js:
-    misc/autocomplete.js: { weight: -1 }
+    assets/js/autocomplete.js: { weight: -1 }
   dependencies:
     - core/jquery
     - core/drupal
@@ -106,7 +106,7 @@ drupal.autocomplete:
 drupal.batch:
   version: VERSION
   js:
-    misc/batch.js: { cache: false }
+    assets/js/batch.js: { cache: false }
   dependencies:
     - core/jquery
     - core/drupal
@@ -118,7 +118,7 @@ drupal.batch:
 drupal.collapse:
   version: VERSION
   js:
-    misc/collapse.js: {}
+    assets/js/collapse.js: {}
   dependencies:
     - core/jquery
     - core/modernizr
@@ -129,7 +129,7 @@ drupal.collapse:
 drupal.debounce:
   version: VERSION
   js:
-    misc/debounce.js: {}
+    assets/js/debounce.js: {}
   dependencies:
     # @todo Remove Drupal dependency.
     - core/drupal
@@ -137,12 +137,12 @@ drupal.debounce:
 drupal.dialog:
   version: VERSION
   js:
-    misc/dialog/dialog.js: {}
-    misc/dialog/dialog.position.js: {}
-    misc/dialog/dialog.jquery-ui.js: {}
+    assets/components/dialog/dialog.js: {}
+    assets/components/dialog/dialog.position.js: {}
+    assets/components/dialog/dialog.jquery-ui.js: {}
   css:
     theme:
-      misc/dialog.theme.css: {}
+      assets/components/dialog/dialog.theme.css: {}
   dependencies:
     - core/jquery
     - core/drupal
@@ -154,7 +154,7 @@ drupal.dialog:
 drupal.dialog.ajax:
   version: VERSION
   js:
-    misc/dialog/dialog.ajax.js: {}
+    assets/components/dialog/dialog.ajax.js: {}
   dependencies:
     - core/jquery
     - core/drupal
@@ -165,7 +165,7 @@ drupal.dialog.ajax:
 drupal.displace:
   version: VERSION
   js:
-    misc/displace.js: {}
+    assets/js/displace.js: {}
   dependencies:
     - core/jquery
     - core/drupal
@@ -174,12 +174,12 @@ drupal.displace:
 drupal.dropbutton:
   version: VERSION
   js:
-    misc/dropbutton/dropbutton.js: {}
+    assets/components/dropbutton/dropbutton.js: {}
   css:
     component:
-      misc/dropbutton/dropbutton.css: {}
+      assets/components/dropbutton/dropbutton.css: {}
     theme:
-      misc/dropbutton/dropbutton.theme.css: {}
+      assets/components/dropbutton/dropbutton.theme.css: {}
   dependencies:
     - core/jquery
     - core/drupal
@@ -189,7 +189,7 @@ drupal.dropbutton:
 drupal.form:
   version: VERSION
   js:
-    misc/form.js: {}
+    assets/js/form.js: {}
   dependencies:
     - core/jquery
     - core/drupal
@@ -200,7 +200,7 @@ drupal.form:
 drupal.machine-name:
   version: VERSION
   js:
-    misc/machine-name.js: {}
+    assets/js/machine-name.js: {}
   dependencies:
     - core/jquery
     - core/jquery.once
@@ -210,7 +210,7 @@ drupal.machine-name:
 drupal.progress:
   version: VERSION
   js:
-    misc/progress.js: {}
+    assets/js/progress.js: {}
   dependencies:
     - core/drupal
     - core/jquery
@@ -219,7 +219,7 @@ drupal.progress:
 drupal.states:
   version: VERSION
   js:
-    misc/states.js: {}
+    assets/js/states.js: {}
   dependencies:
     - core/jquery
     - core/drupal
@@ -229,7 +229,7 @@ drupal.states:
 drupal.tabbingmanager:
   version: VERSION
   js:
-    misc/tabbingmanager.js: {}
+    assets/js/tabbingmanager.js: {}
   dependencies:
     - core/jquery
     # Supplies the ':tabbable' pseudo selector.
@@ -239,7 +239,7 @@ drupal.tabbingmanager:
 drupal.tabledrag:
   version: VERSION
   js:
-    misc/tabledrag.js: { weight: -1 }
+    assets/js/tabledrag.js: { weight: -1 }
   dependencies:
     - core/jquery
     - core/modernizr
@@ -251,7 +251,7 @@ drupal.tabledrag:
 drupal.tableheader:
   version: VERSION
   js:
-    misc/tableheader.js: {}
+    assets/js/tableheader.js: {}
   dependencies:
     - core/jquery
     - core/drupal
@@ -262,7 +262,7 @@ drupal.tableheader:
 drupal.tableresponsive:
   version: VERSION
   js:
-    misc/tableresponsive.js: {}
+    assets/js/tableresponsive.js: {}
   dependencies:
     - core/jquery
     - core/drupal
@@ -271,7 +271,7 @@ drupal.tableresponsive:
 drupal.tableselect:
   version: VERSION
   js:
-    misc/tableselect.js: {}
+    assets/js/tableselect.js: {}
   dependencies:
     - core/drupal
     - core/jquery
@@ -280,7 +280,7 @@ drupal.tableselect:
 drupal.timezone:
   version: VERSION
   js:
-    misc/timezone.js: {}
+    assets/js/timezone.js: {}
   dependencies:
     - core/jquery
     - core/jquery.once
@@ -290,10 +290,10 @@ drupal.vertical-tabs:
   version: VERSION
   js:
     # Load before core/drupal.collapse.
-    misc/vertical-tabs.js: { weight: -1 }
+    assets/js/vertical-tabs.js: { weight: -1 }
   css:
     component:
-      misc/vertical-tabs.css: {}
+      assets/css/vertical-tabs.css: {}
   dependencies:
     - core/jquery
     - core/jquery.once
@@ -364,7 +364,7 @@ jquery.form:
 jquery.intrinsic:
   version: VERSION
   js:
-    misc/jquery.intrinsic.js: {}
+    assets/js/jquery.intrinsic.js: {}
   dependencies:
     - core/jquery
 
diff --git a/core/includes/common.inc b/core/includes/common.inc
index 1c915e9..91db7d1 100644
--- a/core/includes/common.inc
+++ b/core/includes/common.inc
@@ -1140,8 +1140,8 @@ function drupal_clean_id_identifier($id) {
  *
  * Examples:
  * @code
- *   _drupal_add_js('core/misc/collapse.js');
- *   _drupal_add_js('core/misc/collapse.js', 'file');
+ *   _drupal_add_js('core/assets/js/collapse.js');
+ *   _drupal_add_js('core/assets/js/collapse.js', 'file');
  *   _drupal_add_js('http://example.com/example.js', 'external');
  *   _drupal_add_js(array('myModule' => array('key' => 'value')), 'setting');
  * @endcode
diff --git a/core/lib/Drupal/Core/Ajax/AddCssCommand.php b/core/lib/Drupal/Core/Ajax/AddCssCommand.php
index ccd6312..d0a8a41 100644
--- a/core/lib/Drupal/Core/Ajax/AddCssCommand.php
+++ b/core/lib/Drupal/Core/Ajax/AddCssCommand.php
@@ -13,9 +13,9 @@
  * An AJAX command for adding css to the page via ajax.
  *
  * This command is implemented by Drupal.AjaxCommands.prototype.add_css()
- * defined in misc/ajax.js.
+ * defined in assets/js/ajax.js.
  *
- * @see misc/ajax.js
+ * @see assets/js/ajax.js
  *
  * @ingroup ajax
  */
diff --git a/core/lib/Drupal/Core/Ajax/AfterCommand.php b/core/lib/Drupal/Core/Ajax/AfterCommand.php
index 8674c73..78a2bd2 100644
--- a/core/lib/Drupal/Core/Ajax/AfterCommand.php
+++ b/core/lib/Drupal/Core/Ajax/AfterCommand.php
@@ -17,7 +17,7 @@
  * given selector.
  *
  * This command is implemented by Drupal.AjaxCommands.prototype.insert()
- * defined in misc/ajax.js.
+ * defined in assets/js/ajax.js.
  *
  * @see http://docs.jquery.com/Manipulation/after#content
  *
diff --git a/core/lib/Drupal/Core/Ajax/AppendCommand.php b/core/lib/Drupal/Core/Ajax/AppendCommand.php
index d758720..d6b92cb 100644
--- a/core/lib/Drupal/Core/Ajax/AppendCommand.php
+++ b/core/lib/Drupal/Core/Ajax/AppendCommand.php
@@ -17,7 +17,7 @@
  * by the given selector.
  *
  * This command is implemented by Drupal.AjaxCommands.prototype.insert()
- * defined in misc/ajax.js.
+ * defined in assets/js/ajax.js.
  *
  * @see http://docs.jquery.com/Manipulation/append#content
  *
diff --git a/core/lib/Drupal/Core/Ajax/BeforeCommand.php b/core/lib/Drupal/Core/Ajax/BeforeCommand.php
index 7e3e2ea..f85da16 100644
--- a/core/lib/Drupal/Core/Ajax/BeforeCommand.php
+++ b/core/lib/Drupal/Core/Ajax/BeforeCommand.php
@@ -17,7 +17,7 @@
  * the given selector.
  *
  * This command is implemented by Drupal.AjaxCommands.prototype.insert()
- * defined in misc/ajax.js.
+ * defined in assets/js/ajax.js.
  *
  * @see http://docs.jquery.com/Manipulation/before#content
  *
diff --git a/core/lib/Drupal/Core/Ajax/ChangedCommand.php b/core/lib/Drupal/Core/Ajax/ChangedCommand.php
index 2832d58..11491da 100644
--- a/core/lib/Drupal/Core/Ajax/ChangedCommand.php
+++ b/core/lib/Drupal/Core/Ajax/ChangedCommand.php
@@ -16,7 +16,7 @@
  * given selector as 'ajax-changed'.
  *
  * This command is implemented by Drupal.AjaxCommands.prototype.changed()
- * defined in misc/ajax.js.
+ * defined in assets/js/ajax.js.
  *
  * @ingroup ajax
  */
diff --git a/core/lib/Drupal/Core/Ajax/CssCommand.php b/core/lib/Drupal/Core/Ajax/CssCommand.php
index 470d583..d960190 100644
--- a/core/lib/Drupal/Core/Ajax/CssCommand.php
+++ b/core/lib/Drupal/Core/Ajax/CssCommand.php
@@ -16,7 +16,7 @@
  * apply the CSS arguments to elements matched by the given selector.
  *
  * This command is implemented by Drupal.AjaxCommands.prototype.css() defined
- * in misc/ajax.js.
+ * in assets/js/ajax.js.
  *
  * @see http://docs.jquery.com/CSS/css#properties
  *
diff --git a/core/lib/Drupal/Core/Ajax/DataCommand.php b/core/lib/Drupal/Core/Ajax/DataCommand.php
index 5b40e30..d04bb3c 100644
--- a/core/lib/Drupal/Core/Ajax/DataCommand.php
+++ b/core/lib/Drupal/Core/Ajax/DataCommand.php
@@ -16,7 +16,7 @@
  * selector via jQuery's data cache.
  *
  * This command is implemented by Drupal.AjaxCommands.prototype.data() defined
- * in misc/ajax.js.
+ * in assets/js/ajax.js.
  *
  * @ingroup ajax
  */
diff --git a/core/lib/Drupal/Core/Ajax/HtmlCommand.php b/core/lib/Drupal/Core/Ajax/HtmlCommand.php
index b9c9568..0f181de 100644
--- a/core/lib/Drupal/Core/Ajax/HtmlCommand.php
+++ b/core/lib/Drupal/Core/Ajax/HtmlCommand.php
@@ -17,7 +17,7 @@
  * leaving the outer tags intact.
  *
  * This command is implemented by Drupal.AjaxCommands.prototype.insert()
- * defined in misc/ajax.js.
+ * defined in assets/js/ajax.js.
  *
  * @see http://docs.jquery.com/Attributes/html#val
  *
diff --git a/core/lib/Drupal/Core/Ajax/InsertCommand.php b/core/lib/Drupal/Core/Ajax/InsertCommand.php
index d1f0133..a84ebb9 100644
--- a/core/lib/Drupal/Core/Ajax/InsertCommand.php
+++ b/core/lib/Drupal/Core/Ajax/InsertCommand.php
@@ -17,7 +17,7 @@
  * variable of the element that triggered the request.
  *
  * This command is implemented by Drupal.AjaxCommands.prototype.insert()
- * defined in misc/ajax.js.
+ * defined in assets/js/ajax.js.
  *
  * @ingroup ajax
  */
diff --git a/core/lib/Drupal/Core/Ajax/InvokeCommand.php b/core/lib/Drupal/Core/Ajax/InvokeCommand.php
index 4aa1ea1..1da7e34 100644
--- a/core/lib/Drupal/Core/Ajax/InvokeCommand.php
+++ b/core/lib/Drupal/Core/Ajax/InvokeCommand.php
@@ -18,7 +18,7 @@
  * removeClass(), toggleClass(), etc.
  *
  * This command is implemented by Drupal.AjaxCommands.prototype.invoke()
- * defined in misc/ajax.js.
+ * defined in assets/js/ajax.js.
  *
  * @ingroup ajax
  */
diff --git a/core/lib/Drupal/Core/Ajax/PrependCommand.php b/core/lib/Drupal/Core/Ajax/PrependCommand.php
index d977197..825bf30 100644
--- a/core/lib/Drupal/Core/Ajax/PrependCommand.php
+++ b/core/lib/Drupal/Core/Ajax/PrependCommand.php
@@ -17,7 +17,7 @@
  * by the given selector.
  *
  * This command is implemented by Drupal.AjaxCommands.prototype.insert()
- * defined in misc/ajax.js.
+ * defined in assets/js/ajax.js.
  *
  * @see http://docs.jquery.com/Manipulation/prepend#content
  *
diff --git a/core/lib/Drupal/Core/Ajax/RemoveCommand.php b/core/lib/Drupal/Core/Ajax/RemoveCommand.php
index f0e5aab..def44f8 100644
--- a/core/lib/Drupal/Core/Ajax/RemoveCommand.php
+++ b/core/lib/Drupal/Core/Ajax/RemoveCommand.php
@@ -17,7 +17,7 @@
  * within them.
  *
  * This command is implemented by Drupal.AjaxCommands.prototype.remove()
- * defined in misc/ajax.js.
+ * defined in assets/js/ajax.js.
  *
  * @see http://docs.jquery.com/Manipulation/remove#expr
  *
diff --git a/core/lib/Drupal/Core/Ajax/ReplaceCommand.php b/core/lib/Drupal/Core/Ajax/ReplaceCommand.php
index fb2b9e5..69ec457 100644
--- a/core/lib/Drupal/Core/Ajax/ReplaceCommand.php
+++ b/core/lib/Drupal/Core/Ajax/ReplaceCommand.php
@@ -17,7 +17,7 @@
  * selector with the given HTML.
  *
  * This command is implemented by Drupal.AjaxCommands.prototype.insert()
- * defined in misc/ajax.js.
+ * defined in assets/js/ajax.js.
  *
  * See
  * @link http://docs.jquery.com/Manipulation/replaceWith#content jQuery replaceWith command @endlink
diff --git a/core/lib/Drupal/Core/Ajax/RestripeCommand.php b/core/lib/Drupal/Core/Ajax/RestripeCommand.php
index 708344c..ffb59b9 100644
--- a/core/lib/Drupal/Core/Ajax/RestripeCommand.php
+++ b/core/lib/Drupal/Core/Ajax/RestripeCommand.php
@@ -16,7 +16,7 @@
  * usually used after a table has been modified by a replace or append command.
  *
  * This command is implemented by Drupal.AjaxCommands.prototype.restripe()
- * defined in misc/ajax.js.
+ * defined in assets/js/ajax.js.
  *
  * @ingroup ajax
  */
diff --git a/core/lib/Drupal/Core/Ajax/SettingsCommand.php b/core/lib/Drupal/Core/Ajax/SettingsCommand.php
index a5a8dc8..c574756 100644
--- a/core/lib/Drupal/Core/Ajax/SettingsCommand.php
+++ b/core/lib/Drupal/Core/Ajax/SettingsCommand.php
@@ -17,7 +17,7 @@
  * given array, depending on the value of the $merge parameter.
  *
  * This command is implemented by Drupal.AjaxCommands.prototype.settings()
- * defined in misc/ajax.js.
+ * defined in assets/js/ajax.js.
  *
  * @ingroup ajax
  */
diff --git a/core/lib/Drupal/Core/Ajax/UpdateBuildIdCommand.php b/core/lib/Drupal/Core/Ajax/UpdateBuildIdCommand.php
index 2ce74db..bb6af78 100644
--- a/core/lib/Drupal/Core/Ajax/UpdateBuildIdCommand.php
+++ b/core/lib/Drupal/Core/Ajax/UpdateBuildIdCommand.php
@@ -18,7 +18,7 @@
  * forms.
  *
  * This command is implemented by
- * Drupal.AjaxCommands.prototype.update_build_id() defined in misc/ajax.js.
+ * Drupal.AjaxCommands.prototype.update_build_id() defined in assets/js/ajax.js.
  *O
  * @ingroup ajax
  */
diff --git a/core/modules/book/templates/book-export-html.html.twig b/core/modules/book/templates/book-export-html.html.twig
index 5fb2e97..e7e258b 100644
--- a/core/modules/book/templates/book-export-html.html.twig
+++ b/core/modules/book/templates/book-export-html.html.twig
@@ -24,7 +24,7 @@
     <title>{{ title }}</title>
     {{ page.head }}
     <base href="{{ base_url }}" />
-    <link type="text/css" rel="stylesheet" href="misc/print.css" />
+    <link type="text/css" rel="stylesheet" href="assets/css/print.css" />
   </head>
   <body>
     {#
diff --git a/core/modules/simpletest/simpletest.module b/core/modules/simpletest/simpletest.module
index 273bf3c..ccbfaff 100644
--- a/core/modules/simpletest/simpletest.module
+++ b/core/modules/simpletest/simpletest.module
@@ -54,8 +54,8 @@ function simpletest_js_alter(&$javascript) {
   // Since SimpleTest is a special use case for the table select, stick the
   // SimpleTest JavaScript above the table select.
   $simpletest = drupal_get_path('module', 'simpletest') . '/simpletest.js';
-  if (array_key_exists($simpletest, $javascript) && array_key_exists('core/misc/tableselect.js', $javascript)) {
-    $javascript[$simpletest]['weight'] = $javascript['core/misc/tableselect.js']['weight'] - 1;
+  if (array_key_exists($simpletest, $javascript) && array_key_exists('core/assets/js/tableselect.js', $javascript)) {
+    $javascript[$simpletest]['weight'] = $javascript['core/assets/js/tableselect.js']['weight'] - 1;
   }
 }
 
diff --git a/core/modules/system/language.api.php b/core/modules/system/language.api.php
index d0ab879..078010e 100644
--- a/core/modules/system/language.api.php
+++ b/core/modules/system/language.api.php
@@ -58,7 +58,7 @@
  * - For Twig templates, use 't' or 'trans' filters to indicate translatable
  *   text. See https://www.drupal.org/node/2133321 for more information.
  * - In JavaScript code, use the Drupal.t() and Drupal.formatPlural() functions
- *   (defined in core/misc/drupal.js) to translate UI text.
+ *   (defined in misc/drupal.js) to translate UI text.
  * - If you are using a custom module, theme, etc. that is not hosted on
  *   Drupal.org, see
  *   @link interface_translation_properties Interface translation properties topic @endlink
diff --git a/core/modules/system/src/Tests/Ajax/DialogTest.php b/core/modules/system/src/Tests/Ajax/DialogTest.php
index 4e29567..3ac9ab5 100644
--- a/core/modules/system/src/Tests/Ajax/DialogTest.php
+++ b/core/modules/system/src/Tests/Ajax/DialogTest.php
@@ -138,7 +138,7 @@ public function testDialog() {
     // Check that CSS and JavaScript are "added" to the page dynamically.
     $this->assertTrue(in_array('dialog.css', array_keys($ajax_result[0]['settings']['ajaxPageState']['css'])), 'jQuery UI dialog CSS added to the page.');
     $this->assertTrue(in_array('core/assets/vendor/jquery.ui/ui/dialog-min.js', array_keys($ajax_result[0]['settings']['ajaxPageState']['js'])), 'jQuery UI dialog JS added to the page.');
-    $this->assertTrue(in_array('core/misc/dialog/dialog.ajax.js', array_keys($ajax_result[0]['settings']['ajaxPageState']['js'])), 'Drupal dialog JS added to the page.');
+    $this->assertTrue(in_array('core/assets/components/dialog/dialog.ajax.js', array_keys($ajax_result[0]['settings']['ajaxPageState']['js'])), 'Drupal dialog JS added to the page.');
 
     // Check that the response matches the expected value.
     $this->assertEqual($modal_expected_response, $ajax_result[3], 'POST request modal dialog JSON response matches.');
diff --git a/core/modules/system/src/Tests/Common/AttachedAssetsTest.php b/core/modules/system/src/Tests/Common/AttachedAssetsTest.php
index 8401acf..63bb771 100644
--- a/core/modules/system/src/Tests/Common/AttachedAssetsTest.php
+++ b/core/modules/system/src/Tests/Common/AttachedAssetsTest.php
@@ -352,7 +352,7 @@ function testAlter() {
     // tableselect.js. See simpletest_js_alter() to see where this alteration
     // takes place.
     $js = drupal_get_js();
-    $this->assertTrue(strpos($js, 'simpletest.js') < strpos($js, 'core/misc/tableselect.js'), 'Altering JavaScript weight through the alter hook.');
+    $this->assertTrue(strpos($js, 'simpletest.js') < strpos($js, 'core/assets/js/tableselect.js'), 'Altering JavaScript weight through the alter hook.');
   }
 
   /**
diff --git a/core/modules/system/src/Tests/Form/ElementsVerticalTabsTest.php b/core/modules/system/src/Tests/Form/ElementsVerticalTabsTest.php
index 44a47c2..9e032cd 100644
--- a/core/modules/system/src/Tests/Form/ElementsVerticalTabsTest.php
+++ b/core/modules/system/src/Tests/Form/ElementsVerticalTabsTest.php
@@ -38,8 +38,8 @@ protected function setUp() {
    */
   function testJavaScriptOrdering() {
     $this->drupalGet('form_test/vertical-tabs');
-    $position1 = strpos($this->content, 'core/misc/vertical-tabs.js');
-    $position2 = strpos($this->content, 'core/misc/collapse.js');
+    $position1 = strpos($this->content, 'core/assets/js/vertical-tabs.js');
+    $position2 = strpos($this->content, 'core/assets/js/collapse.js');
     $this->assertTrue($position1 !== FALSE && $position2 !== FALSE && $position1 < $position2, 'vertical-tabs.js is included before collapse.js');
   }
 
diff --git a/core/modules/system/src/Tests/System/SystemAuthorizeTest.php b/core/modules/system/src/Tests/System/SystemAuthorizeTest.php
index cbc359a..de8da16 100644
--- a/core/modules/system/src/Tests/System/SystemAuthorizeTest.php
+++ b/core/modules/system/src/Tests/System/SystemAuthorizeTest.php
@@ -61,6 +61,6 @@ function testFileTransferHooks() {
     $this->assertText('System Test Username');
     // Test that \Drupal\Core\Render\BareHtmlPageRenderer adds assets as
     // expected to the first page of the authorize.php script.
-    $this->assertRaw('core/misc/states.js');
+    $this->assertRaw('core/assets/js/states.js');
   }
 }
diff --git a/core/modules/system/src/Tests/Theme/TableTest.php b/core/modules/system/src/Tests/Theme/TableTest.php
index 412cb8e..138cc4e 100644
--- a/core/modules/system/src/Tests/Theme/TableTest.php
+++ b/core/modules/system/src/Tests/Theme/TableTest.php
@@ -47,7 +47,7 @@ function testThemeTableStickyHeaders() {
     );
     $this->render($table);
     $js = _drupal_add_js();
-    $this->assertTrue(isset($js['core/misc/tableheader.js']), 'tableheader.js found.');
+    $this->assertTrue(isset($js['core/assets/js/tableheader.js']), 'tableheader.js found.');
     $this->assertRaw('sticky-enabled');
     drupal_static_reset('_drupal_add_js');
   }
@@ -72,7 +72,7 @@ function testThemeTableNoStickyHeaders() {
     );
     $this->render($table);
     $js = _drupal_add_js();
-    $this->assertFalse(isset($js['core/misc/tableheader.js']), 'tableheader.js not found.');
+    $this->assertFalse(isset($js['core/assets/js/tableheader.js']), 'tableheader.js not found.');
     $this->assertNoRaw('sticky-enabled');
     drupal_static_reset('_drupal_add_js');
   }
diff --git a/core/modules/system/tests/upgrade/drupal-7.language.database.php b/core/modules/system/tests/upgrade/drupal-7.language.database.php
index b113e36..69aa9e0 100644
--- a/core/modules/system/tests/upgrade/drupal-7.language.database.php
+++ b/core/modules/system/tests/upgrade/drupal-7.language.database.php
@@ -236,7 +236,7 @@
 ))
 ->values(array(
   'lid' => '15',
-  'location' => 'misc/tabledrag.js',
+  'location' => 'assets/js/tabledrag.js',
   'textgroup' => 'default',
   'source' => 'Re-order rows by numerical weight instead of dragging.',
   'context' => '',
@@ -244,7 +244,7 @@
 ))
 ->values(array(
   'lid' => '16',
-  'location' => 'misc/tabledrag.js',
+  'location' => 'assets/js/tabledrag.js',
   'textgroup' => 'default',
   'source' => 'Show row weights',
   'context' => '',
@@ -252,7 +252,7 @@
 ))
 ->values(array(
   'lid' => '17',
-  'location' => 'misc/tabledrag.js',
+  'location' => 'assets/js/tabledrag.js',
   'textgroup' => 'default',
   'source' => 'Hide row weights',
   'context' => '',
@@ -260,7 +260,7 @@
 ))
 ->values(array(
   'lid' => '18',
-  'location' => 'misc/tabledrag.js',
+  'location' => 'assets/js/tabledrag.js',
   'textgroup' => 'default',
   'source' => 'Drag to re-order',
   'context' => '',
@@ -268,7 +268,7 @@
 ))
 ->values(array(
   'lid' => '19',
-  'location' => 'misc/tabledrag.js',
+  'location' => 'assets/js/tabledrag.js',
   'textgroup' => 'default',
   'source' => 'Changes made in this table will not be saved until the form is submitted.',
   'context' => '',
@@ -276,7 +276,7 @@
 ))
 ->values(array(
   'lid' => '20',
-  'location' => 'misc/collapse.js',
+  'location' => 'assets/js/collapse.js',
   'textgroup' => 'default',
   'source' => 'Hide',
   'context' => '',
@@ -284,7 +284,7 @@
 ))
 ->values(array(
   'lid' => '21',
-  'location' => 'misc/collapse.js',
+  'location' => 'assets/js/collapse.js',
   'textgroup' => 'default',
   'source' => 'Show',
   'context' => '',
@@ -384,7 +384,7 @@
 ))
 ->values(array(
   'name' => 'javascript_parsed',
-  'value' => 'a:16:{i:0;s:14:"misc/drupal.js";i:1;s:14:"misc/jquery.js";i:2;s:19:"misc/jquery.once.js";s:10:"refresh:ca";s:7:"waiting";i:3;s:29:"misc/ui/jquery.ui.core.min.js";i:4;s:21:"misc/jquery.ba-bbq.js";i:5;s:33:"modules/overlay/overlay-parent.js";i:6;s:32:"modules/contextual/contextual.js";i:7;s:21:"misc/jquery.cookie.js";i:8;s:26:"modules/toolbar/toolbar.js";i:9;s:32:"modules/overlay/overlay-child.js";i:10;s:19:"misc/tableheader.js";i:11;s:17:"misc/tabledrag.js";i:12;s:12:"misc/form.js";i:13;s:16:"misc/collapse.js";s:10:"refresh:cv";s:7:"waiting";}',
+  'value' => 'a:16:{i:0;s:14:"misc/drupal.js";i:1;s:14:"assets/js/jquery.js";i:2;s:19:"assets/js/jquery.once.js";s:10:"refresh:ca";s:7:"waiting";i:3;s:29:"assets/js/ui/jquery.ui.core.min.js";i:4;s:21:"assets/js/jquery.ba-bbq.js";i:5;s:33:"modules/overlay/overlay-parent.js";i:6;s:32:"modules/contextual/contextual.js";i:7;s:21:"assets/js/jquery.cookie.js";i:8;s:26:"modules/toolbar/toolbar.js";i:9;s:32:"modules/overlay/overlay-child.js";i:10;s:19:"assets/js/tableheader.js";i:11;s:17:"assets/js/tabledrag.js";i:12;s:12:"assets/js/form.js";i:13;s:16:"assets/js/collapse.js";s:10:"refresh:cv";s:7:"waiting";}',
 ))
 ->values(array(
   'name' => 'language_count',
diff --git a/core/themes/classy/templates/book-export-html.html.twig b/core/themes/classy/templates/book-export-html.html.twig
index cbeb3b3..82fe14e 100644
--- a/core/themes/classy/templates/book-export-html.html.twig
+++ b/core/themes/classy/templates/book-export-html.html.twig
@@ -24,7 +24,7 @@
     <title>{{ title }}</title>
     {{ page.head }}
     <base href="{{ base_url }}" />
-    <link type="text/css" rel="stylesheet" href="misc/print.css" />
+    <link type="text/css" rel="stylesheet" href="assets/css/print.css" />
   </head>
   <body>
     {#
diff --git a/core/themes/seven/css/components/vertical-tabs.css b/core/themes/seven/css/components/vertical-tabs.css
index 325a3af..14907c2 100644
--- a/core/themes/seven/css/components/vertical-tabs.css
+++ b/core/themes/seven/css/components/vertical-tabs.css
@@ -1,5 +1,5 @@
 /**
- * Override of misc/vertical-tabs.css.
+ * Override of assets/css/vertical-tabs.css.
  */
 .vertical-tabs {
   position: relative;