Adding a class to radio buttons and checkboxes in Angular when they are checked or selected without needing to trigger a change event

Question

Adding a class to radio buttons and checkboxes in Angular when they are checked or selected without needing to trigger a change event

I am looking to implement ngClass based on whether an item is checked or not. Essentially, I want the user to visually see which items are selected through radio buttons or check-boxes by adding a class to them, allowing me to apply different CSS styles to selected items. I am utilizing for check-boxes and a standard ngRepeat for radio buttons. In the example provided for the check-box model, the selected items are highlighted. However, I want the page to load with items pre-selected and adorned with a class for the selected ones. I prefer not to rely on a 'change' function as it requires user interaction. Instead, I want it to be bound to the page or within ngClass.

I have explored How do I conditionally apply CSS styles in AngularJS?, but it did not address my specific needs.

Any assistance on this matter would be highly appreciated.

javascript angularjs checkbox radio-button ng-class

Answer 1

Answer №1

To dynamically apply a class based on a condition, you can do the following:

<div ng-repeat="animal in animals">
    <input type="checkbox" ng-model="animal.isHungry" ng-class="{'when-condition-true': animal.isHungry}">
</div>

The class when-condition-true will be added to the element when the isHungry attribute of the current animal is true in the controller.

You can also switch classes based on a condition like this:

<div ng-repeat="animal in animals">
    <input type="checkbox" ng-model="animal.isHungry" ng-class="animal.isHungry ? 'when-condition-true' : 'when-condition-false'">
</div>

Both approaches will automatically apply or remove classes on page load without requiring user interaction. The classes will also update dynamically as users check or uncheck the checkboxes.

Answer 2

To dynamically apply a class based on a condition, you can do the following:

<div ng-repeat="animal in animals">
    <input type="checkbox" ng-model="animal.isHungry" ng-class="{'when-condition-true': animal.isHungry}">
</div>

The class when-condition-true will be added to the element when the isHungry attribute of the current animal is true in the controller.

You can also switch classes based on a condition like this:

<div ng-repeat="animal in animals">
    <input type="checkbox" ng-model="animal.isHungry" ng-class="animal.isHungry ? 'when-condition-true' : 'when-condition-false'">
</div>

Both approaches will automatically apply or remove classes on page load without requiring user interaction. The classes will also update dynamically as users check or uncheck the checkboxes.

Adding a class to radio buttons and checkboxes in Angular when they are checked or selected without needing to trigger a change event

Answer №1

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