Adding a class to the body element in an HTML file using AngularJS

Greetings! Currently I am in the process of developing a web application using AngularJS SPA, which supports both English and Arabic languages. I am facing an issue with adding RTL and LTR properties by applying classes to the body HTML element in my app.js file as seen below:

 $scope.changeLanguage = function (lang) {
        $scope.lang = lang == 'de_AR' ? 'de_AR' : 'de_EN';
        var myEl = angular.element(document.querySelector('#body'));
        myEl.addClass('rtl');
}

Despite implementing the above code snippet, I have not been able to successfully add the class. The rendered HTML in the browser displays the following:

<body ng-controller="RoslpAppController" class="ng-scope">

I am seeking assistance on the correct method to apply CSS classes using AngularJS. Could you please provide insights on this matter?

javascriptangularjs

Answer №1

Here are some examples of using ternary checks and multiple cases in ng class:

<div ng-class="(language === 'de_AR') ? 'rtl' : 'ltr'"></div>

This is an example of handling multiple cases in ng class based on one condition:

<div ng-class="{'de_AR':'rtl', 'de_EN':'ltr'}[language]"></div>

Code snippet to implement the changes inside a controller:

$scope.changeLanguage = function (language) {
        $scope.language = language == 'de_AR' ? 'de_AR' : 'de_EN';
        var element = angular.element(document.querySelector('#body'));
        element.addClass('rtl');
}

Answer №2

If you need to incorporate the ngClass directive into your AngularJS project, look no further. By utilizing a scope variable like $scope.rtl to control the display of content, you can leverage ng-class for adding dynamic classes:

 <body ng-controller="MainCtrl" ng-class="{'rtl'}">

Check out this DEMO for a live example.

Answer №3

To apply conditional classes in AngularJS, you can utilize the ng-class directive

<div ng-controller="MyAppController" ng-class="{'highlight': condition == true, 'bold-text': condition != false}">

Answer №4

Why your code is ineffective:

angular.element(document.querySelector('#body'));

This snippet is searching for an element with the id 'body'. To access the body itself, you should use:

angular.element(document.querySelector('body'));

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