Add in-form="true" attribute

src/uiSelectController.js

@@ -427,7 +427,7 @@ uis.controller('uiSelectCtrl',
       case KEY.ENTER:
         if(ctrl.open && (ctrl.tagging.isActivated || ctrl.activeIndex >= 0)){
           ctrl.select(ctrl.items[ctrl.activeIndex]); // Make sure at least one dropdown item is highlighted before adding if not in tagging mode
-        } else {
+        } else if (!$scope.inForm) {
           ctrl.activate(false, true); //In case its the search input in 'multiple' mode
         }
         break;

src/uiSelectDirective.js

@@ -50,6 +50,9 @@ uis.directive('uiSelect',
         //Limit the number of selections allowed
         $select.limit = (angular.isDefined(attrs.limit)) ? parseInt(attrs.limit, 10) : undefined;
 
+        //Do not open dropdown list and do not stop propagation to allow form submit if pressing Enter (only if dropdown list is closed)
+        scope.inForm = (angular.isDefined(attrs.inForm)) ? $parse(attrs.inForm)(scope) : true;
+
         //Set reference to ngModel from uiSelectCtrl
         $select.ngModel = ngModel;
 

src/uiSelectSingleDirective.js

@@ -93,7 +93,7 @@ uis.directive('uiSelectSingle', ['$timeout','$compile', function($timeout, $comp
           return;
         }
 
-        if (e.which === KEY.TAB || KEY.isControl(e) || KEY.isFunctionKey(e) || e.which === KEY.ESC) {
+        if (e.which === KEY.TAB || KEY.isControl(e) || KEY.isFunctionKey(e) || e.which === KEY.ESC || (scope.inForm && e.which == KEY.ENTER)) {
           return;
         }