fix(typeahead): loading callback updates after blur

Fixes #1822
Closes #1904

src/typeahead/test/typeahead.spec.js

@@ -507,6 +507,25 @@ describe('typeahead tests', function () {
       expect(element).toBeClosed();
     });
 
+    it('should properly update loading callback if an element is not focused', function () {
+
+      $scope.items = function(viewValue) {
+        return $timeout(function(){
+          return [viewValue];
+        });
+      };
+      var element = prepareInputEl('<div><input ng-model="result" typeahead-loading="isLoading" typeahead="item for item in items($viewValue)"></div>');
+      var inputEl = findInput(element);
+
+      changeInputValueTo(element, 'match');
+      $scope.$digest();
+
+      inputEl.blur();
+      $timeout.flush();
+
+      expect($scope.isLoading).toBeFalsy();
+    });
+
     it('issue 1140 - should properly update loading callback when deleting characters', function () {
 
       $scope.items = function(viewValue) {

src/typeahead/typeahead.js

@@ -110,7 +110,8 @@ angular.module('ui.bootstrap.typeahead', ['ui.bootstrap.position', 'ui.bootstrap
 
           //it might happen that several async queries were in progress if a user were typing fast
           //but we are interested only in responses that correspond to the current view value
-          if (inputValue === modelCtrl.$viewValue && hasFocus) {
+          var onCurrentRequest = (inputValue === modelCtrl.$viewValue);
+          if (onCurrentRequest && hasFocus) {
             if (matches.length > 0) {
 
               scope.activeIdx = 0;
@@ -136,6 +137,8 @@ angular.module('ui.bootstrap.typeahead', ['ui.bootstrap.position', 'ui.bootstrap
             } else {
               resetMatches();
             }
+          }
+          if (onCurrentRequest) {
             isLoadingSetter(originalScope, false);
           }
         }, function(){