AngularJS restricts inputs to be read-only

Question

AngularJS restricts inputs to be read-only

I'm facing an issue with readonly inputs in AngularJS. I have a select element that changes the values of readonly inputs through a script. However, when I attempt to display these values using ng-model in a table as {{ng-model}}, they don't appear.

<select name="well" onChange="Update(this.value)" ng-model="well" required>
<option value="Well-01">Well-01</option>
<option value="Well-02">Well-02</option>
<option value="Well-03">Well-03</option>
</select>
<label>Region:</label>
<input type="text" name="region" value="South" ng-model="region" disabled>
<label>State:</label>
<input type="text" name="state" value="Oklahoma" ng-model="state"  disabled>
<label>Field Office:</label>
<input type="text" name="office" value="Ringwood" ng-model="office" disabled>

Fiddle: http://jsfiddle.net/NKyps/7/

It displays {{well}} when I change it, but the inputs are not shown. Thanks for your assistance. PS: If anyone knows how to set a default option (e.g., Well-01) so that the inputs are filled when the document is loaded, please share.

javascript select input angularjs

Answer 1

Answer №1

It seems that the issue lies in the attributes not being properly bound to a model. When using {{variable}}, Angular expects them to be binding with a specific model.

I have included the scope model in your tags:

<form ng-controller="Sarapastrule" name="form">
</form>

Please review: http://jsfiddle.net/NKyps/9/

Answer 2

It seems that the issue lies in the attributes not being properly bound to a model. When using {{variable}}, Angular expects them to be binding with a specific model.

I have included the scope model in your tags:

<form ng-controller="Sarapastrule" name="form">
</form>

Please review: http://jsfiddle.net/NKyps/9/

Answer 3

Answer №2

According to Bart, it seems you might be missing some fundamental AngularJS concepts and may benefit from reading the AngularJS tutorial available at http://docs.angularjs.org/tutorial.

In AngularJS, two-way data binding is essential. It handles updating the DOM while developers mainly focus on updating the model. Directly accessing value properties of input fields is not the recommended approach in AngularJS.

I have made modifications to your jsFiddle to work properly, but I do suggest going through the tutorial to grasp the underlying principles of AngularJS better.

You can view the updated version here: http://jsfiddle.net/BnqZS/1/

It's important to establish a controller first to manage the business logic. Within the controller, keep an eye on and update the model accordingly. Instead of:

if (choice == "Well-01") {
    region.value = 'South';
    state.value = 'Oklahoma';
    office.value = 'Ringwood';
}

You should set up a watch on the model connected to the option input field and use code like this:

$scope.$watch('well', function(choice) {
  if (choice == "Well-01") {
        $scope.region = 'South';
        $scope.state = 'Oklahoma';
        $scope.office = 'Ringwood';
    }

}

Answer 4

According to Bart, it seems you might be missing some fundamental AngularJS concepts and may benefit from reading the AngularJS tutorial available at http://docs.angularjs.org/tutorial.

In AngularJS, two-way data binding is essential. It handles updating the DOM while developers mainly focus on updating the model. Directly accessing value properties of input fields is not the recommended approach in AngularJS.

I have made modifications to your jsFiddle to work properly, but I do suggest going through the tutorial to grasp the underlying principles of AngularJS better.

You can view the updated version here: http://jsfiddle.net/BnqZS/1/

It's important to establish a controller first to manage the business logic. Within the controller, keep an eye on and update the model accordingly. Instead of:

if (choice == "Well-01") {
    region.value = 'South';
    state.value = 'Oklahoma';
    office.value = 'Ringwood';
}

You should set up a watch on the model connected to the option input field and use code like this:

$scope.$watch('well', function(choice) {
  if (choice == "Well-01") {
        $scope.region = 'South';
        $scope.state = 'Oklahoma';
        $scope.office = 'Ringwood';
    }

}

Answer 5

Answer №3

Your approach involves working outside of angular and performing custom DOM manipulation, which goes against the core principles of angular.js. I have provided an updated fiddle here for reference.

To resolve this issue, it is recommended to use a controller with a scope to define the values of your model.

function ExampleController($scope) {

    $scope.Update = function () {
        if ($scope.well == "Well-01") {
            $scope.region = 'South';
            $scope.state = 'Oklahoma';
            $scope.office = 'Ringwood';
        }

        if ($scope.well == "Well-02") {
            $scope.region = 'North';
            $scope.state = 'Montana';
            $scope.office = 'Sidney';
        }

        if ($scope.well == "Well-03") {
            $scope.region = 'North';
            $scope.state = 'North Dakota';
            $scope.office = 'Tioga';
        }
    }

    $scope.well = 'Well-01';
    $scope.Update();
}

The primary issue with your current design is the attempt to manage two separate models, one in JavaScript and another in the DOM. Angular.js is optimized for handling DOM manipulation on your behalf, simplifying the task of updating your model. Instead of manually updating the DOM, focus on creating a view that generates itself from a model, allowing modifications only to the JavaScript model ($scope variable).

Answer 6

Your approach involves working outside of angular and performing custom DOM manipulation, which goes against the core principles of angular.js. I have provided an updated fiddle here for reference.

To resolve this issue, it is recommended to use a controller with a scope to define the values of your model.

function ExampleController($scope) {

    $scope.Update = function () {
        if ($scope.well == "Well-01") {
            $scope.region = 'South';
            $scope.state = 'Oklahoma';
            $scope.office = 'Ringwood';
        }

        if ($scope.well == "Well-02") {
            $scope.region = 'North';
            $scope.state = 'Montana';
            $scope.office = 'Sidney';
        }

        if ($scope.well == "Well-03") {
            $scope.region = 'North';
            $scope.state = 'North Dakota';
            $scope.office = 'Tioga';
        }
    }

    $scope.well = 'Well-01';
    $scope.Update();
}

The primary issue with your current design is the attempt to manage two separate models, one in JavaScript and another in the DOM. Angular.js is optimized for handling DOM manipulation on your behalf, simplifying the task of updating your model. Instead of manually updating the DOM, focus on creating a view that generates itself from a model, allowing modifications only to the JavaScript model ($scope variable).

AngularJS restricts inputs to be read-only

Answer №1

Answer №2

Answer №3

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