Extracted the original positioning out

With this change, any instances overriding the dropdown is
required to decorate it with the positioning module.

Gruntfile.js

@@ -10,7 +10,10 @@ module.exports = function (grunt) {
 
   fullIncludes = [
     'jquery',
-    'select2/compat/matcher'
+
+    'select2/compat/matcher',
+
+    'select2/dropdown/attachContainer'
   ].concat(includes);
 
   var i18nModules = [];

dist/js/select2.amd.full.js

@@ -2586,8 +2586,7 @@ define('select2/dropdown',[
   };
 
   Dropdown.prototype.position = function ($dropdown, $container) {
-    var $dropdownContainer = $container.find('.dropdown-wrapper');
+    // Should be implmented in subclasses
-    $dropdownContainer.append($dropdown);
   };
 
   Dropdown.prototype.destroy = function () {
@@ -2961,12 +2960,17 @@ define('select2/defaults',[
 
   './i18n/en'
 ], function ($, ResultsList,
+
              SingleSelection, MultipleSelection, Placeholder, AllowClear,
              SelectionSearch,
+
              Utils, Translation, DIACRITICS,
+
              SelectData, ArrayData, AjaxData, Tags, MinimumInputLength,
+
              Dropdown, DropdownSearch, HidePlaceholder, InfiniteScroll,
              AttachBody,
+
              EnglishTranslation) {
   function Defaults () {
     this.reset();
@@ -3580,6 +3584,22 @@ define('select2/compat/matcher',[
   return oldMatcher;
 });
 
+define('select2/dropdown/attachContainer',[
+
+], function () {
+  function AttachContainer (decorated, $element, options) {
+    decorated.call(this, $element, options);
+  }
+
+  AttachContainer.prototype.position =
+    function (decorated, $container, $dropdown) {
+    var $dropdownContainer = $container.find('.dropdown-wrapper');
+    $dropdownContainer.append($dropdown);
+  };
+
+  return AttachContainer;
+});
+
 define('jquery.select2',[
   'jquery',
   'select2/core'

dist/js/select2.amd.js

@@ -2586,8 +2586,7 @@ define('select2/dropdown',[
   };
 
   Dropdown.prototype.position = function ($dropdown, $container) {
-    var $dropdownContainer = $container.find('.dropdown-wrapper');
+    // Should be implmented in subclasses
-    $dropdownContainer.append($dropdown);
   };
 
   Dropdown.prototype.destroy = function () {
@@ -2961,12 +2960,17 @@ define('select2/defaults',[
 
   './i18n/en'
 ], function ($, ResultsList,
+
              SingleSelection, MultipleSelection, Placeholder, AllowClear,
              SelectionSearch,
+
              Utils, Translation, DIACRITICS,
+
              SelectData, ArrayData, AjaxData, Tags, MinimumInputLength,
+
              Dropdown, DropdownSearch, HidePlaceholder, InfiniteScroll,
              AttachBody,
+
              EnglishTranslation) {
   function Defaults () {
     this.reset();

dist/js/select2.full.js

@@ -12121,8 +12121,7 @@ define('select2/dropdown',[
   };
 
   Dropdown.prototype.position = function ($dropdown, $container) {
-    var $dropdownContainer = $container.find('.dropdown-wrapper');
+    // Should be implmented in subclasses
-    $dropdownContainer.append($dropdown);
   };
 
   Dropdown.prototype.destroy = function () {
@@ -12496,12 +12495,17 @@ define('select2/defaults',[
 
   './i18n/en'
 ], function ($, ResultsList,
+
              SingleSelection, MultipleSelection, Placeholder, AllowClear,
              SelectionSearch,
+
              Utils, Translation, DIACRITICS,
+
              SelectData, ArrayData, AjaxData, Tags, MinimumInputLength,
+
              Dropdown, DropdownSearch, HidePlaceholder, InfiniteScroll,
              AttachBody,
+
              EnglishTranslation) {
   function Defaults () {
     this.reset();
@@ -13115,6 +13119,22 @@ define('select2/compat/matcher',[
   return oldMatcher;
 });
 
+define('select2/dropdown/attachContainer',[
+
+], function () {
+  function AttachContainer (decorated, $element, options) {
+    decorated.call(this, $element, options);
+  }
+
+  AttachContainer.prototype.position =
+    function (decorated, $container, $dropdown) {
+    var $dropdownContainer = $container.find('.dropdown-wrapper');
+    $dropdownContainer.append($dropdown);
+  };
+
+  return AttachContainer;
+});
+
 define('jquery.select2',[
   'jquery',
   'select2/core'

dist/js/select2.js

@@ -3014,8 +3014,7 @@ define('select2/dropdown',[
   };
 
   Dropdown.prototype.position = function ($dropdown, $container) {
-    var $dropdownContainer = $container.find('.dropdown-wrapper');
+    // Should be implmented in subclasses
-    $dropdownContainer.append($dropdown);
   };
 
   Dropdown.prototype.destroy = function () {
@@ -3389,12 +3388,17 @@ define('select2/defaults',[
 
   './i18n/en'
 ], function ($, ResultsList,
+
              SingleSelection, MultipleSelection, Placeholder, AllowClear,
              SelectionSearch,
+
              Utils, Translation, DIACRITICS,
+
              SelectData, ArrayData, AjaxData, Tags, MinimumInputLength,
+
              Dropdown, DropdownSearch, HidePlaceholder, InfiniteScroll,
              AttachBody,
+
              EnglishTranslation) {
   function Defaults () {
     this.reset();

src/js/select2/defaults.js

@@ -26,12 +26,17 @@ define([
 
   './i18n/en'
 ], function ($, ResultsList,
+
              SingleSelection, MultipleSelection, Placeholder, AllowClear,
              SelectionSearch,
+
              Utils, Translation, DIACRITICS,
+
              SelectData, ArrayData, AjaxData, Tags, MinimumInputLength,
+
              Dropdown, DropdownSearch, HidePlaceholder, InfiniteScroll,
              AttachBody,
+
              EnglishTranslation) {
   function Defaults () {
     this.reset();

src/js/select2/dropdown.js

@@ -20,8 +20,7 @@ define([
   };
 
   Dropdown.prototype.position = function ($dropdown, $container) {
-    var $dropdownContainer = $container.find('.dropdown-wrapper');
+    // Should be implmented in subclasses
-    $dropdownContainer.append($dropdown);
   };
 
   Dropdown.prototype.destroy = function () {

src/js/select2/dropdown/attachContainer.js

@@ -0,0 +1,15 @@
+define([
+
+], function () {
+  function AttachContainer (decorated, $element, options) {
+    decorated.call(this, $element, options);
+  }
+
+  AttachContainer.prototype.position =
+    function (decorated, $container, $dropdown) {
+    var $dropdownContainer = $container.find('.dropdown-wrapper');
+    $dropdownContainer.append($dropdown);
+  };
+
+  return AttachContainer;
+});