How to call predefined JavaScript function in ng-change event?

Question

Here's my code, however ng-change is never called. Does anyone know why ? Thanks

<html ng-app="">

<head>
</head>

<body data-ng-init="names=['A', 'B', 'C']">

<script src="resources/js/angular/angular.min.js"></script>
<script src="resources/js/angular/angular.min.js.map"></script>

<select class="form-control input-sm"
        ng-model="fda"
        ng-change="alert('changed')"
        ng-options= "value for value in names" >
</select>


</body>

</html>

You've to write a function. Eg: ng-change = "changefunction()" and in your controller $scope.changefunction = function() { alert("changed"); } — Prarthana Hegde
– Prarthana Hegde, Commented May 3, 2017 at 10:58
I think it's a good question, But it could be how to call predefined JavaScript function in ng-change event? I have answered for this sense — Ramesh Rajendran
– Ramesh Rajendran, Commented May 3, 2017 at 11:14

Sajeetharan · Accepted Answer · 2017-05-03 11:01:28Z

2

You need to have a controller and a corresponding function inside of it,

app.controller("myCtrl", function($scope) {
$scope.alert = function (){
    alert("changed");
}
});

DEMO

var app = angular.module("myApp", []);
app.controller("myCtrl", function($scope) {
 $scope.alert = function (){
    alert("changed");
}
});

<!DOCTYPE html>
<html>
<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.4.8/angular.min.js"></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('changed')" ng-options="value for value in names">
     </select>
    </div>
</body>

</html>

answered May 3, 2017 at 11:01

Sajeetharan

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3 Comments

zjffdu Over a year ago

Thanks @Sajeetharan , it works. But I still want to know whether I can call function inline without controller like my code snippet.

Sajeetharan Over a year ago

@zjffdu No you cannot do without a controller.

Stealth Rabbi Over a year ago

why in your ng-change, you're calling alert() and passing in 'change'? That doesn't seem to be used in your $scope.alert() reference at all.

Ramesh Rajendran · Accepted Answer · 2017-05-03 11:12:07Z

Just add this line in your controller $scope.alert = alert.bind(window);

var app = angular.module("myApp", []); 
app.controller("myCtrl", function($scope) {      
  $scope.alert = alert.bind(window);
   });

<!DOCTYPE html>
<html>
<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.4.8/angular.min.js"></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('changed')" ng-options="value for value in names">
     </select>
    </div>
</body>

</html>

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