"Unleashing the power of ng-options in AngularJS: a guide to dynamically retrieving the index

Question

"Unleashing the power of ng-options in AngularJS: a guide to dynamically retrieving the index

I am currently working with a select element, where I need both the selected value and dynamically generated index (I do not want to set the default index to [0]). How can this be achieved?

        <div class="input-label">
          Select Mobile
        </div>

        <select ng-model="mobile" ng-options="mobile as mobile.value for mobile in editContactModalData.phoneNumbers"></select>
      </label>

    The code above represents a select option, while below there is an input box where the selected value is displayed.       

      <label class="item item-input item-stacked-label" ng-show="mobile">
        <input type="tel" maxlength="10" placeholder="mobile" ng-model="mobile.value">
      </label>

This pertains to one modal, but I wish to display these changes of the selected mobile in another modal.

The second modal includes:

  <span>{{contact.phoneNumbers[0].value}}</span>

Therefore, instead of specifying the [0] index, I would like to dynamically insert the selected value.

javascript angularjs

Answer 1

Answer №1

@Nikhil: One important point to note is that ngOptions does not have built-in support for $index like ng-repeat.

If you require the index of a specific value, you can achieve it by using the following approach:

<select 
  ng-model="selectedItem"
  ng-options="values.indexOf(selectedItem) as selectedItem for 
selectedItem in values">
</select>

Answer 2

@Nikhil: One important point to note is that ngOptions does not have built-in support for $index like ng-repeat.

If you require the index of a specific value, you can achieve it by using the following approach:

<select 
  ng-model="selectedItem"
  ng-options="values.indexOf(selectedItem) as selectedItem for 
selectedItem in values">
</select>

Answer 3

Answer №2

To change the contact value using ng-change, you can do the following:

<select ng-change="updateContactNumber(phone)" ng-model="phone" ng-options="phone as phone.number for phone in contactPhoneNumbers"></select>

In your controller, define the update function like this:

$scope.updateContactNumber = function(number){

$scope.contactNumber = number.number;

}

And then display the updated contact number in your view like this:

{{contactNumber}}

Answer 4

To change the contact value using ng-change, you can do the following:

<select ng-change="updateContactNumber(phone)" ng-model="phone" ng-options="phone as phone.number for phone in contactPhoneNumbers"></select>

In your controller, define the update function like this:

$scope.updateContactNumber = function(number){

$scope.contactNumber = number.number;

}

And then display the updated contact number in your view like this:

{{contactNumber}}

"Unleashing the power of ng-options in AngularJS: a guide to dynamically retrieving the index

Answer №1

Answer №2

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