Comment faire pour capturer l'événement de ng-changement?

Voici mon code, Mais la $event est pas défini. Quelqu'un sait-il comment puis-je capturer l'événement?

<!DOCTYPE html>
<html>
<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.4.8/angular.min.js"></script>

<script type="text/javascript">

    var app = angular.module("myApp", []);
    app.controller("myCtrl", function($scope) {
        $scope.alert = function ($event){
            alert($event);
        }
    });
</script>

<body ng-app="myApp" ng-controller="myCtrl">
<div ng-init="names=['A', 'B', 'C']">
    <select class="form-control input-sm" ng-model="fda" ng-change="alert($event)" ng-options="value for value in names">
    </select>
</div>
</body>

</html>

OriginalL'auteur zjffdu | 2017-05-03

  1. -1

    Vous ne pouvez pas, cette réponse est prise à partir d'un rapide résultat de recherche de google:

    ng-change is not a directive for handling the change event
(I realize that this is confusing given the name), but is actually
instead notified when ngModelController.$setViewValue() is called
and the value changes (because ng-change adds a listener to the 
$viewChangeListeners collection). So this is as expected.

    OriginalL'auteur rrd