Does using ng-if with a select and ng-options cause issues with ngModel?

Question

Does using ng-if with a select and ng-options cause issues with ngModel?

Check out this plunker showcasing Angular's ngOptions feature:

I decided to spice things up by adding an ngIf directive to the initial select element:

<div ng-if="1<2">
    Color (null not allowed):
    <select ng-model="myColor" ng-options="color.name for color in colors"></select><br>
</div>

An interesting observation is that the ngIf seems to disrupt the ngModel binding, rendering the selection change ineffective.

Remarkably, removing the ngIf results in the expected behavior.

Could you please verify whether this issue lies within Angular, my implementation, or if there is a workaround available?

javascript angularjs

Answer 1

Answer №1

When the ng-if directive is utilized, it establishes a distinct scope for the DOM within it. To access the myColor variable from the parent scope, you can simply use ng-model="$parent.myColor"

<div ng-if="1<2">
    Color Selection (cannot be null):
    <select ng-model="$parent.myColor" ng-options="color.name for color in colors"></select><br>
</div>

Answer 2

When the ng-if directive is utilized, it establishes a distinct scope for the DOM within it. To access the myColor variable from the parent scope, you can simply use ng-model="$parent.myColor"

<div ng-if="1<2">
    Color Selection (cannot be null):
    <select ng-model="$parent.myColor" ng-options="color.name for color in colors"></select><br>
</div>

Answer 3

Answer №2

To incorporate $parent into your ng-options while creating a child scope, you can follow the example below:

Take a look at the code snippet:

var app = angular.module('app', []);

app.controller('firstCtrl', function($scope) {
  $scope.colors = [{
    name: "red"
  }, {
    name: "black"
  }]
});

<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.2.23/angular.min.js"></script>

<body ng-app="app">
  <div ng-controller="firstCtrl">

    <div ng-if="1<2">
      Color (null not allowed):
      <select ng-model="myColor" ng-options="color.name for color in $parent.colors"></select>
      <br>
    </div>

  </div>
</body>

Alternatively, you can utilize the controller as syntax like so:

HTML:

<body ng-app="app">
  <div ng-controller="firstCtrl as vm ">

    <div ng-if="1<2">
      Color (null not allowed):
      <select ng-model="myColor" ng-options="color.name for color in vm.colors"></select>
      <br>
    </div>

  </div>
</body>

JS var app = angular.module('app', []);

app.controller('firstCtrl', function() {

  var vm = this;
  vm.colors = [{
    name: "red"
  }, {
    name: "black"
  }]


});

Answer 4

To incorporate $parent into your ng-options while creating a child scope, you can follow the example below:

Take a look at the code snippet:

var app = angular.module('app', []);

app.controller('firstCtrl', function($scope) {
  $scope.colors = [{
    name: "red"
  }, {
    name: "black"
  }]
});

<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.2.23/angular.min.js"></script>

<body ng-app="app">
  <div ng-controller="firstCtrl">

    <div ng-if="1<2">
      Color (null not allowed):
      <select ng-model="myColor" ng-options="color.name for color in $parent.colors"></select>
      <br>
    </div>

  </div>
</body>

Alternatively, you can utilize the controller as syntax like so:

HTML:

<body ng-app="app">
  <div ng-controller="firstCtrl as vm ">

    <div ng-if="1<2">
      Color (null not allowed):
      <select ng-model="myColor" ng-options="color.name for color in vm.colors"></select>
      <br>
    </div>

  </div>
</body>

JS var app = angular.module('app', []);

app.controller('firstCtrl', function() {

  var vm = this;
  vm.colors = [{
    name: "red"
  }, {
    name: "black"
  }]


});

Does using ng-if with a select and ng-options cause issues with ngModel?

Answer №1

Answer №2

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