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Angularjs routing tutorial


AngularJS Routing:

In AngularJS we can create Single Page Application which loads a single HTML page via multiple views i.e. dynamically updates that page as the user interacts with the web app. AngularJS provides ng-view and ng-template directives and $routeProvider services to achieve this.

ng-view directive:

It creates a place holder where a corresponding view (html or ng-template view) can be placed based on the configuration.

<div ng-app = "testApp">
   ...
   <div ng-view></div>
 
</div>

ng-template directive:

It creates an html view using script tag. Its id attribute is used by $routeProvider to map a view with a controller.

<div ng-app = "mainApp">
   ...
 
   <script type = "text/ng-template" id = "addStudent.htm">
      <h2> Add Student </h2>
      {{message}}
   </script>
 
</div>

$routeProvider service:

The $routeProvider service sets the configuration of urls. Map the urls with the corresponding html page or ng-template and attach a controller.

var mainApp = angular.module("mainApp", ['ngRoute']);
 
mainApp.config(['$routeProvider', function($routeProvider) {
   $routeProvider.
 
   when('/addStudent', {
      templateUrl: 'addStudent.htm', controller: 'AddStudentController'
   }).
 
   when('/viewStudents', {
      templateUrl: 'viewStudents.htm', controller: 'ViewStudentsController'
   }).
 
   otherwise({
      redirectTo: '/addStudent'
   });
 
}]);

Example:

<html>   
   <head>
      <title>AngularJS Routing Example</title>
      <script src="http://ajax.googleapis.com/ajax/libs/angularjs/1.4.8/angular.min.js"></script>
      <script src = "http://ajax.googleapis.com/ajax/libs/angularjs/1.4.8/angular-route.min.js"></script>
   </head>
 
   <body>
      <h2>AngularJS Routing Example</h2>
      <div ng-app = "mainApp">
         <p><a href = "#addStudent">Add Student</a></p>
         <p><a href = "#viewStudents">View Students</a></p>
         <div ng-view></div>
 
         <script type = "text/ng-template" id = "addStudent.htm">
            <h2> Add Student </h2>
            {{message}}
         </script>
 
         <script type = "text/ng-template" id = "viewStudents.htm">
            <h2> View Students </h2>
            {{message}}
         </script>
      </div>
 
      <script>
         var mainApp = angular.module("mainApp", ['ngRoute']);
         mainApp.config(['$routeProvider', function($routeProvider) {
            $routeProvider.
 
            when('/addStudent', {
               templateUrl: 'addStudent.htm',
               controller: 'AddStudentController'
            }).
 
            when('/viewStudents', {
               templateUrl: 'viewStudents.htm',
               controller: 'ViewStudentsController'
            }).
 
            otherwise({
               redirectTo: '/addStudent'
            });
         }]);
 
         mainApp.controller('AddStudentController', function($scope) {
            $scope.message = "Add Student page will be used to display add student form";
         });
 
         mainApp.controller('ViewStudentsController', function($scope) {
            $scope.message = "View Students page will be used to display all the students";
         });
 
      </script>
 
   </body>
</html>

Try it:

AngularJS Routing Example on jsbin.com

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