$watch not firing on data change
Try passing true as a 3rd argument to .$watch()
$rootScope.Scope documentation
$watch(watchExpression, listener, objectEquality)objectEquality(optional) – {boolean=} – Compare object for equality rather than for reference.
I fixed some stuff.
http://plnkr.co/edit/5Zaln7QT2gETVcGiMdoW?p=preview
The JS
var myMod = angular.module("myApp",[]).controller("MainController", function($scope){ $scope.myModel = {selectedId:null};}).controller("DetailController",function($scope){ $scope.items = [1,2,3,4]; $scope.watchHitCount = 0; $scope.$watch('myModel.selectedId', function(newVal, oldVal){ console.log(newVal + " " + oldVal); $scope.watchHitCount++; },true);});The index.html
<body ng-app="myApp"> <div ng-controller="MainController"> <ng-include src="'detail.html'" ng-controller="DetailController"></ng-include> </div> </body>The detail.html
<pre>watch hit: {{watchHitCount}}</pre><pre>selected value: {{myModel.selectedId}}</pre><select ng-model="myModel.selectedId" ui-select2=""> <option></option> <option ng-repeat="item in items" value="{{item}}">{{item}}</option></select>It was complaining about not finding the controller so I set it up the way I normally would with a named ng-app and a module declared that has controllers defined on it.
I also added an object to hold the value in your model. It is bad practice to use the $scope object as your model, instead your scope should refer to an object that is your model.
There are a simple fix for that, to use watch with complex object instead of simple variable
For example (DON"T USE)
$scope.selectedType=1;//default$scope.$watch( function () { return $scope.selectedType; }, function (newValue, oldValue) { if (!angular.equals(oldValue, newValue)) { $scope.DoWork(); } }, true);But Use below
$scope.selecteditem={selectedType:1};$scope.$watch( function () { return $scope.selecteditem.selectedType; }, function (newValue, oldValue) { if (!angular.equals(oldValue, newValue)) { $scope.DoWork(); } }, true);note that "slectedTypes" in the second example located inside object, not just scope variable. this will work even in old Angular versions.