According to the documentation, the ngChange directive will not trigger if the model is updated programmatically rather than through a change in the input value.
Does this imply that once you programmatically modify the model, you are unable to utilize ngChange at all?
Alternatively, does it suggest that ngChange cannot be used when:
1) The model is modified programmatically
AND
2) It's not possible to update the model through the input field
Essentially, if you use JavaScript to modify the model, the ngChange expression will not be activated. In order for ngChange to trigger, you would have to invoke the expression programmatically like this:
<input type="checkbox" ng-model="confirmed" ng-change="change()" id="ng-change-example2" />
To ensure that the change function is executed, you must manually call it:
$scope.confirmed = 'updated';
$scope.change();
After carefully reviewing your query, it appears that using ng-change may not achieve the desired outcome as you mentioned. However, there is a potential solution worth exploring - ng-model-options. This feature was introduced in AngularJS 1.3 and could potentially help you make progress.
One intriguing aspect of ng-model-options is its support for automatic getters and setters, enabling real-time model changes. By leveraging this functionality, you might be able to invoke your update function through the use of ng-bind.
This approach could possibly offer a resolution to the issue you are facing...
(function(angular) {
'use strict';
angular.module('getterSetterExample', [])
.controller('ExampleController', ['$scope', function($scope) {
var _name = 'Brian';
$scope.user = {
name: function(newName) {
return angular.isDefined(newName) ? (_name = newName) : _name;
}
};
}]);
})(window.angular);<!doctype html>
<html lang="en">
<head>
<meta charset="UTF-8>
<title>Example - example-ngModelOptions-directive-getter-setter-production</title>
<script src="//ajax.googleapis.com/ajax/libs/angularjs/1.3.7/angular.min.js></script>
<script src="app.js></script>
</head>
<body ng-app="getterSetterExample">
<div ng-controller="ExampleController">
<form name="userForm>
Name:
<input type="text" name="userName"
ng-model="user.name"
ng-model-options="{ getterSetter: true }" />
</form>
<pre>user.name = <span ng-bind="user.name()"></span></pre>
</div>
</body>
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