What is the best way to associate this local variable with an ng-class directive?

Question

What is the best way to associate this local variable with an ng-class directive?

I've hit a roadblock with what seems to be a simple task.

Here's what I have in my code:

<div>{{selectedTheme.theme}}</div>
<ion-nav-view ng-class="selectedTheme.theme" name="menuContent"></ion-nav-view>

The issue is that while the class displays correctly in the first div, it doesn't seem to get added to the ion-nav-view element.

As a result, the generated markup looks like this:

<div class="ng-binding">Dark</div>
<ion-nav-view ng-class="selectedTheme.theme" name="menuContent" class="view-container" nav-view-transition="ios" nav-view-direction="none" nav-swipe="">></ion-nav-view>

Any suggestions or insights would be greatly appreciated!

PS: Just using class directly works without any issues.

javascript angularjs ionic-framework

Answer 1

Answer №1

When it comes to Angular, ng-class allows you to use either an expression or a plain string. This means you have the flexibility to:

Add or remove classes based on Angular variables
Add or remove classes based on evaluated expressions
Bind single or multiple classes based on dynamic data

If you simply add an Angular variable to ng-class, that variable will determine the class to be used for the element. For example, if selectedTheme.theme returns the exact name of the class you want to apply, then it should work seamlessly.

<ion-nav-view ng-class="varHoldingClassName" name="menuContent"></ion-nav-view>

Here's a comprehensive example showcasing how this works:

var myApp = angular.module('myApp',[]);

function MyCtrl($scope) {
    $scope.name = 'Angular!';
    $scope.selectedTheme = {
         'coalTheme': 'textColor'
    };
}

.textColor{
    color: red;  
}

<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.2.23/angular.min.js"></script>

<div ng-app="myApp">
<div ng-controller="MyCtrl">
    <div ng-class="selectedTheme.coalTheme">Hello, {{name}}!</div>
</div>
</div>

Answer 2

When it comes to Angular, ng-class allows you to use either an expression or a plain string. This means you have the flexibility to:

Add or remove classes based on Angular variables
Add or remove classes based on evaluated expressions
Bind single or multiple classes based on dynamic data

If you simply add an Angular variable to ng-class, that variable will determine the class to be used for the element. For example, if selectedTheme.theme returns the exact name of the class you want to apply, then it should work seamlessly.

<ion-nav-view ng-class="varHoldingClassName" name="menuContent"></ion-nav-view>

Here's a comprehensive example showcasing how this works:

var myApp = angular.module('myApp',[]);

function MyCtrl($scope) {
    $scope.name = 'Angular!';
    $scope.selectedTheme = {
         'coalTheme': 'textColor'
    };
}

.textColor{
    color: red;  
}

<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.2.23/angular.min.js"></script>

<div ng-app="myApp">
<div ng-controller="MyCtrl">
    <div ng-class="selectedTheme.coalTheme">Hello, {{name}}!</div>
</div>
</div>

What is the best way to associate this local variable with an ng-class directive?

Answer №1

Similar questions

Ensure that each item rendered in a VUE.js v-for loop is distinct and not repetitive

Transforming Google Maps from using jQuery to AngularJS

What is the best way to remove a MySQL entry with the help of Ajax and Jquery?

What is the best method for initializing the value of ng-model as an empty string in AngularJS?

Discover the correct steps to transition from using particles.js to the react-tsparticles package

Xcode 12.4 error: 'Notifications cannot be enabled' in Ionic 5

Can you always rely on promises being fulfilled?

When dealing with async actions in NUXT, Vuex properties may fail to reflect changes in the DOM

What is the easiest way to include a copyright symbol in a React component?

What steps should I take with my Android PWA manifest and service workers?

Pass the result of the callback function from the service to the component

"Deactivate the escaping feature in PHP when using heredoc syntax

Error: Mapping values to cards resulted in a TypeError: Property 'map' cannot be read from undefined source

Using an AJAX request to edit a record directly without the need for a

AngularJS will not reload the page when the link clicked has the same URL as the current page

The local time displayed by Moment JS is not accurate and matches the time stored in the database

Guide on displaying data from a list in aspx with javascript/Jquery from aspx.cs

Collection of components displayed in a row - Bootstrap 4

Having Multiple File Inputs [type=file] in one webpage

Error: Unable to execute map() function on commands.options? while configuring slash commands