How to set active tab style with AngularJS ?
In this article, we will see how to set an active tab style using AngularJS, & will also understand its implementation through the example. This task can be accomplished by implementing the isActive and the ng-controller method. We will perform this task with 2 different methods.
Method 1: The ng-controller Directive in AngularJS is used to add a controller to the application. It can be used to add methods, functions, and variables that can be called on some event like click, etc to perform certain actions.
Syntax:
<element ng-controller="expression">
Contents...
</element>The below example implements the above approach.
Example 1: This example describes setting the active tab style using AngularJS.
<!DOCTYPE html>
<html>
<head>
<title>
How to set active tab style with AngularJS?
</title>
</head>
<body>
<div class="collapse navbar-collapse"
ng-controller="HeaderController">
<ul class="nav navbar-nav">
<li ng-class="{ active: isActive('/')}">
<a href="/">Geeks For Geeks</a>
</li>
<li ng-class="{ active: isActive('/html')}">
<a href="/html">HTML</a>
</li>
<li ng-class="{ active: isActive('/js')}">
<a href="/js">JAVASCRIPT</a>
</li>
</ul>
</div>
<div ng-view></div>
<script>
function HeaderController($scope, $location) {
$scope.isActive = function(viewLocation) {
return viewLocation === $location.path();
};
}
</script>
</body>
</html>
Output:
Method 2: Here we will use the modular function in Angular JS to create a module. A module is created by using the AngularJS function angular.module.
Syntax: for creating a module:
<div ng-app="myFirstApp">...</div>
<script>
var app = angular.module("myFirstApp", []);
//myFirstApp refers to HTML element in which application runs.
</script>
Syntax: for adding a directive to the module:
<div ng-app="myApp"></div>
<script>
var my_app = angular.module("myFirstApp", []);
my_app.directive("DirectiveApp", function() {
return {
template : "Hello Geeks!!!"
};
});
</script>
Example 2: This is another example that describes setting the active tab style using AngularJS.
<!DOCTYPE html>
<html>
<head>
<title>How to set active tab style with AngularJS?</title>
</head>
<body>
<div ng-app="link">
<a href="#Geeks For Geeks" active-link="active">
Geeks For Geeks
</a>
<a href="#HTML" active-link="active">HTML</a>
<a href="#JAVASCRIPT" active-link="active">JAVASCRIPT</a>
</div>
<script>
angular.module('link', []).directive('Link',
['$location', function(location) {
return {
link: function(scope, element, attrs) {
var active = attrs.activeLink;
var path = attrs.href;
path = path.substring(1);
scope.location = location;
scope.$watch('location.path()', function(newPath) {
if(path === newPath) {
element.addClass(active);
} else {
element.removeClass(active);
}
});
}
};
}]);
</script>
</body>
</html>
Output:
