AngularJS does not transmit values of hidden fields

Question

AngularJS does not transmit values of hidden fields

Currently, I find myself in a situation where I need to submit a form using the traditional method. This means that I am using a form with action="", and the response is streamed without reloading the page. While I understand that this approach is not typical for an AngularJS application, it is currently my only option.

In attempting to work around this limitation, I have tried populating some hidden fields using Angular:

<input type="hidden" name="someData" ng-model="data" /> {{data}}

It is worth noting that the correct value does appear in the data field.

The structure of the form is standard:

<form id="aaa" name="aaa" action="/reports/aaa.html" method="post">
...
<input type="submit" value="Export" />
</form>

However, when I submit the form, no value is sent to the server when using a hidden input field. Interestingly, changing the input field to type "text" results in the expected behavior. I suspect that the hidden field is not being properly populated unlike the text field, which benefits from two-way binding.

Does anyone have any suggestions on how I can successfully submit a hidden field populated by AngularJS?

javascript forms angularjs

Answer 1

Answer №1

To utilize double binding with a hidden field is not possible. Instead, you can opt to use brackets :

<input type="hidden" name="someData" value="{{data}}" /> {{data}}

EDIT : Check out this discussion on github : https://github.com/angular/angular.js/pull/2574

EDIT:

From Angular 1.2 onwards, 'ng-value' directive allows you to bind an expression to the value attribute of an input. While it is typically used with radio or checkbox inputs, it can also be applied to hidden inputs.

Here is how to use ng-value for a hidden input:

<input type="hidden" name="someData" ng-value="data" />

Take a look at this fiddle demonstrating ng-value in action with a hidden input: http://jsfiddle.net/6SD9N

Answer 2

To utilize double binding with a hidden field is not possible. Instead, you can opt to use brackets :

<input type="hidden" name="someData" value="{{data}}" /> {{data}}

EDIT : Check out this discussion on github : https://github.com/angular/angular.js/pull/2574

EDIT:

From Angular 1.2 onwards, 'ng-value' directive allows you to bind an expression to the value attribute of an input. While it is typically used with radio or checkbox inputs, it can also be applied to hidden inputs.

Here is how to use ng-value for a hidden input:

<input type="hidden" name="someData" ng-value="data" />

Take a look at this fiddle demonstrating ng-value in action with a hidden input: http://jsfiddle.net/6SD9N

Answer 3

Answer №2

If you ever find yourself in a situation where Angular is ignoring certain elements, consider using the type=text and adding display:none;. While this may not be the typical practice, it could be necessary for special circumstances.

<input type="text" name="someData" ng-model="data" style="display: none;"/>

Answer 4

If you ever find yourself in a situation where Angular is ignoring certain elements, consider using the type=text and adding display:none;. While this may not be the typical practice, it could be necessary for special circumstances.

<input type="text" name="someData" ng-model="data" style="display: none;"/>

Answer 5

Answer №3

Within the controller:

$scope.itemId = $routeParams.itemId;

In the HTML view:

<input type="hidden" name="itemId" ng-model="item.itemId" ng-init="item.itemId = itemId" />

Answer 6

Within the controller:

$scope.itemId = $routeParams.itemId;

In the HTML view:

<input type="hidden" name="itemId" ng-model="item.itemId" ng-init="item.itemId = itemId" />

Answer 7

Answer №4

After searching for a solution, I came across a helpful post by Mike on sapiensworks. The suggestion is to use a directive that monitors changes in the model:

.directive('ngUpdateHidden',function() {
    return function(scope, el, attr) {
        var model = attr['ngModel'];
        scope.$watch(model, function(nv) {
            el.val(nv);
        });
    };
})

Then, apply this directive to your input element:

<input type="hidden" name="item.Name" ng-model="item.Name" ng-update-hidden />

However, tymeJV's approach might be more effective as hidden inputs do not trigger change events in JavaScript, as mentioned by yycorman in this post. Using tymeJV's method ensures that changing the value through a jQuery plugin will still have the desired effect.

Edit I have modified the directive to update the model with a new value when a change event occurs, essentially making it behave like an input text field.

.directive('ngUpdateHidden', function () {
    return {
        restrict: 'AE',
        scope: {},
        replace: true,
        require: 'ngModel',
        link: function ($scope, elem, attr, ngModel) {
            $scope.$watch(ngModel, function (nv) {
                elem.val(nv);
            });
            elem.change(function () {
                $scope.$apply(function () {
                    ngModel.$setViewValue(elem.val());
                });
            });
        }
    };
})

Now, when you trigger

$("#yourInputHidden").trigger('change')

event using jQuery, it will also update the bound model accordingly.

Answer 8

After searching for a solution, I came across a helpful post by Mike on sapiensworks. The suggestion is to use a directive that monitors changes in the model:

.directive('ngUpdateHidden',function() {
    return function(scope, el, attr) {
        var model = attr['ngModel'];
        scope.$watch(model, function(nv) {
            el.val(nv);
        });
    };
})

Then, apply this directive to your input element:

<input type="hidden" name="item.Name" ng-model="item.Name" ng-update-hidden />

However, tymeJV's approach might be more effective as hidden inputs do not trigger change events in JavaScript, as mentioned by yycorman in this post. Using tymeJV's method ensures that changing the value through a jQuery plugin will still have the desired effect.

Edit I have modified the directive to update the model with a new value when a change event occurs, essentially making it behave like an input text field.

.directive('ngUpdateHidden', function () {
    return {
        restrict: 'AE',
        scope: {},
        replace: true,
        require: 'ngModel',
        link: function ($scope, elem, attr, ngModel) {
            $scope.$watch(ngModel, function (nv) {
                elem.val(nv);
            });
            elem.change(function () {
                $scope.$apply(function () {
                    ngModel.$setViewValue(elem.val());
                });
            });
        }
    };
})

Now, when you trigger

$("#yourInputHidden").trigger('change')

event using jQuery, it will also update the bound model accordingly.

Answer 9

Answer №5

Encountered an unexpected behavior related to a hidden value and are struggling to get it to function properly.

After experimenting, we discovered that the most effective approach is to define the value directly in the controller after the form's scope.

.controller('AddController', [$scope, $http, $state, $stateParams, function($scope, $http, $state, $stateParams) {

    $scope.routineForm = {};
    $scope.routineForm.hiddenfield1 = "specify_value_here";

    $scope.sendData = function {

// Perform JSON HTTP post action to API
}

}])

Answer 10

Encountered an unexpected behavior related to a hidden value and are struggling to get it to function properly.

After experimenting, we discovered that the most effective approach is to define the value directly in the controller after the form's scope.

.controller('AddController', [$scope, $http, $state, $stateParams, function($scope, $http, $state, $stateParams) {

    $scope.routineForm = {};
    $scope.routineForm.hiddenfield1 = "specify_value_here";

    $scope.sendData = function {

// Perform JSON HTTP post action to API
}

}])

Answer 11

Answer №6

My success was a result of -

 <p style="visibility:hidden">{{user.status="customer"}}</p>

Answer 12

My success was a result of -

 <p style="visibility:hidden">{{user.status="customer"}}</p>

Answer 13

Answer №7

revision to @tymeJV 's response example:

 <div style="visibility: hidden">
    <input type="number" name='cost' ng-model="cost" ng-init="cost = <%=@product.cost.to_s%>" >
 </div>

Answer 14

revision to @tymeJV 's response example:

 <div style="visibility: hidden">
    <input type="number" name='cost' ng-model="cost" ng-init="cost = <%=@product.cost.to_s%>" >
 </div>

Answer 15

Answer №8

I encountered a similar issue that required me to send a key from my JSP to JavaScript. It took up a significant portion of my day, around 4 hours or more, to resolve it.

Here is the snippet of code I added to my JavaScript/JSP:

 $scope.sucessMessage = function (){  
    var message =     ($scope.messages.sucess).format($scope.portfolio.name,$scope.portfolio.id);
    $scope.inforMessage = message;
    alert(message);  
}
 

String.prototype.format = function() {
    var formatted = this;
    for( var arg in arguments ) {
        formatted = formatted.replace("{" + arg + "}", arguments[arg]);
    }
    return formatted;
};

<!-- Messages definition -->
<input type="hidden"  name="sucess"   ng-init="messages.sucess='<fmt:message  key='portfolio.create.sucessMessage' />'" >

<!-- Message showed affter insert -->
<div class="alert alert-info" ng-show="(inforMessage.length > 0)">
    {{inforMessage}}
</div>

<!-- properties
  portfolio.create.sucessMessage=Portf\u00f3lio {0} criado com sucesso! ID={1}. -->

The outcome was: Portfólio 1 criado com sucesso! ID=3.

Kind Regards

Answer 16

I encountered a similar issue that required me to send a key from my JSP to JavaScript. It took up a significant portion of my day, around 4 hours or more, to resolve it.

Here is the snippet of code I added to my JavaScript/JSP:

 $scope.sucessMessage = function (){  
    var message =     ($scope.messages.sucess).format($scope.portfolio.name,$scope.portfolio.id);
    $scope.inforMessage = message;
    alert(message);  
}
 

String.prototype.format = function() {
    var formatted = this;
    for( var arg in arguments ) {
        formatted = formatted.replace("{" + arg + "}", arguments[arg]);
    }
    return formatted;
};

<!-- Messages definition -->
<input type="hidden"  name="sucess"   ng-init="messages.sucess='<fmt:message  key='portfolio.create.sucessMessage' />'" >

<!-- Message showed affter insert -->
<div class="alert alert-info" ng-show="(inforMessage.length > 0)">
    {{inforMessage}}
</div>

<!-- properties
  portfolio.create.sucessMessage=Portf\u00f3lio {0} criado com sucesso! ID={1}. -->

The outcome was: Portfólio 1 criado com sucesso! ID=3.

Kind Regards

Answer 17

Answer №9

For those who are still facing difficulties, I encountered a similar issue when trying to manage user sessions/user IDs on a multi-page form.

I was able to resolve this by including the following in the routing:

.when("/q2/:uid", {
    templateUrl: "partials/q2.html",
    controller: 'formController',
    paramExample: uid
})

I also added a hidden field to pass parameters between web form pages:

I am new to Angular, so I'm not certain if this is the most optimal solution, but it is currently working well for me.

Answer 18

For those who are still facing difficulties, I encountered a similar issue when trying to manage user sessions/user IDs on a multi-page form.

I was able to resolve this by including the following in the routing:

.when("/q2/:uid", {
    templateUrl: "partials/q2.html",
    controller: 'formController',
    paramExample: uid
})

I also added a hidden field to pass parameters between web form pages:

I am new to Angular, so I'm not certain if this is the most optimal solution, but it is currently working well for me.

Answer 19

Answer №10

To assign a value directly to the model in the data-ng-value attribute, you can use hidden fields since Angular interpreter does not recognize them as part of ngModel.

<input type="hidden" name="pfuserid" data-ng-value="newPortfolio.UserId = data.Id"/>

Answer 20

To assign a value directly to the model in the data-ng-value attribute, you can use hidden fields since Angular interpreter does not recognize them as part of ngModel.

<input type="hidden" name="pfuserid" data-ng-value="newPortfolio.UserId = data.Id"/>

Answer 21

Answer №11

In my coding practice, I often utilize traditional JavaScript techniques to assign a value to a hidden input field.

$scope.UpdatePersonType = function (personType)
{
    document.getElementById('personInput').value = personType;
    if (personType !== 'person')
    {
        document.getElementById('discountCheckbox').checked = false;
        $scope.isHidden = true;
    }
    else
    {
        $scope.isHidden = false;
    }
}

Answer 22

In my coding practice, I often utilize traditional JavaScript techniques to assign a value to a hidden input field.

$scope.UpdatePersonType = function (personType)
{
    document.getElementById('personInput').value = personType;
    if (personType !== 'person')
    {
        document.getElementById('discountCheckbox').checked = false;
        $scope.isHidden = true;
    }
    else
    {
        $scope.isHidden = false;
    }
}

Answer 23

Answer №12

To successfully execute the following code, it is crucial that the sequence is strictly followed as described: Ensure the order of elements is type, name, ng-model, ng-init, value. This is essential for proper functionality.

Answer 24

To successfully execute the following code, it is crucial that the sequence is strictly followed as described: Ensure the order of elements is type, name, ng-model, ng-init, value. This is essential for proper functionality.

Answer 25

Answer №13

I am excited to present the code I have been working on:

<textarea>Here is some sample text.</textarea>
OR
<span>This is a hidden element.</span>
OR
<div style="display: none;">Another hidden text.</div>

Answer 26

I am excited to present the code I have been working on:

<textarea>Here is some sample text.</textarea>
OR
<span>This is a hidden element.</span>
OR
<div style="display: none;">Another hidden text.</div>

AngularJS does not transmit values of hidden fields

Answer №1

Answer №2

Answer №3

Answer №4

Answer №5

Answer №6

Answer №7

Answer №8

Answer №9

Answer №10

Answer №11

Answer №12

Answer №13

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