Revert "Removing the double event binding registration of "selection:…

…update" within SingleSelection.prototype to prevent multiple calls on the selection event (select2#4306)"

This reverts commit 2042920.

CHANGELOG.md

@@ -114,8 +114,6 @@
 - User-defined types not normalized properly when passed in as data (#4632)
 - Perform deep merge for `Defaults.set()` (#4364)
 - Fix "the results could not be loaded" displaying during AJAX request (#4356)
-- Cache objects in `Utils.__cache` instead of using `$.data` (#4346, #5486)
-- Removing the double event binding registration of `selection:update` (#4306)
 
 #### Accessibility
 - Improve `.select2-hidden-accessible` (#4908)

src/js/select2/selection/single.js

@@ -62,6 +62,10 @@ define([
         self.$selection.trigger('focus');
       }
     });
+
+    container.on('selection:update', function (params) {
+      self.update(params.data);
+    });
   };
 
   SingleSelection.prototype.clear = function () {