Is it possible to apply a class without using ng-class?

Question

Is it possible to apply a class without using ng-class?

Seeking a more efficient way to apply conditional classes to multiple elements on a validation form page, I am exploring options to assign one of five potential classes to each form input. While the traditional method involves manually specifying the class for each input element like so...

<input class="form-control" ng-model="form.input1" type="text" placeholder="Something here" ng-class="{class1: appliedClass('input1') == 1, class2: appliedClass('input1') == 2, class3: appliedClass('input1') == 3, class4: appliedClass('input1') == 4, class5: appliedClass('input1') == 5}" />

This approach can become cumbersome and less maintainable, especially when considering adding a sixth possible class in the future.

The question then arises - is it possible to dynamically apply a class provided by a controller function which returns the appropriate class name?

Though I came across this solution, it appears outdated and unsuccessful with my current version. Attempts using

ng-attr-class='controller_function_who_returns_a_class_name()'

have failed to evaluate the function as intended.

Any suggestions or alternative approaches to achieve this functionality?

javascript angularjs

Answer 1

Answer №1

ng-class is still capable of meeting your needs.

You can achieve this by implementing the following:

ng-class="dynamic_class_function()"

For example:

HTML

<input type="text" ng-class="applyDynamicClasses()">

Javascript

$scope.applyDynamicClasses = function(input) {
  // Check conditions against the input parameter
  // Then return the desired classes as a string
  return 'classA classB classC classD';
};

Answer 2

ng-class is still capable of meeting your needs.

You can achieve this by implementing the following:

ng-class="dynamic_class_function()"

For example:

HTML

<input type="text" ng-class="applyDynamicClasses()">

Javascript

$scope.applyDynamicClasses = function(input) {
  // Check conditions against the input parameter
  // Then return the desired classes as a string
  return 'classA classB classC classD';
};

Answer 3

Answer №2

Achieving this is totally possible! The solution involves creating a controller function, where you can use the object property to assign the class like so:

$scope.getClassForInput = function () {
    //Function body that returns the class name
};

Then, in your view, you can utilize it as shown below:

<input type="text" ng-class="{'true': getClassForInput()}['true']">

Take note of how we're using the index 'true' to retrieve the class linked to the "true" property. ng-class accepts an expression or you can simply provide the class name directly, just like in this scenario.

UPDATE: Have a look at this Fiddle for a demonstration of the same concept!

Answer 4

Achieving this is totally possible! The solution involves creating a controller function, where you can use the object property to assign the class like so:

$scope.getClassForInput = function () {
    //Function body that returns the class name
};

Then, in your view, you can utilize it as shown below:

<input type="text" ng-class="{'true': getClassForInput()}['true']">

Take note of how we're using the index 'true' to retrieve the class linked to the "true" property. ng-class accepts an expression or you can simply provide the class name directly, just like in this scenario.

UPDATE: Have a look at this Fiddle for a demonstration of the same concept!

Is it possible to apply a class without using ng-class?

Answer №1

Answer №2

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