AngularJS supports Single Page Application via multiple views on a
single page. To do this AngularJS has provided ng-view and ng-template
directives and $routeProvider services.
testAngularJS.htm
ng-view
ng-view tag simply creates a place holder where a corresponding view (html or ng-template view) can be placed based on the configuration.Usage
Define a div with ng-view within the main module.<div ng-app = "mainApp"> ... <div ng-view></div> </div>
ng-template
ng-template directive is used to create an html view using script tag. It contains "id" attribute which is used by $routeProvider to map a view with a controller.Usage
Define a script block with type as ng-template within the main module.<div ng-app = "mainApp"> ... <script type = "text/ng-template" id = "addStudent.htm"> <h2> Add Student </h2> {{message}} </script> </div>
$routeProvider
$routeProvider is the key service which set the configuration of urls, map them with the corresponding html page or ng-template, and attach a controller with the same.Usage
Define a script block with main module and set the routing configuration.var mainApp = angular.module("mainApp", ['ngRoute']); mainApp.config(['$routeProvider', function($routeProvider) { $routeProvider. when('/addStudent', { templateUrl: 'addStudent.htm', controller: 'AddStudentController' }). when('/viewStudents', { templateUrl: 'viewStudents.htm', controller: 'ViewStudentsController' }). otherwise({ redirectTo: '/addStudent' }); }]);Following are the important points to be considered in above example.
- $routeProvider is defined as a function under config of mainApp module using key as '$routeProvider'.
- $routeProvider.when defines a url "/addStudent" which then is mapped to "addStudent.htm". addStudent.htm should be present in the same path as main html page.If htm page is not defined then ng-template to be used with id="addStudent.htm". We've used ng-template.
- "otherwise" is used to set the default view.
- "controller" is used to set the corresponding controller for the view.
Example
Following example will showcase all the above mentioned directives.testAngularJS.htm
<html> <head> <title>Angular JS Views</title> <script src = "https://ajax.googleapis.com/ajax/libs/angularjs/1.3.14/angular.min.js"></script> <script src = "https://ajax.googleapis.com/ajax/libs/angularjs/1.3.14/angular-route.min.js"></script> </head> <body> <h2>AngularJS Sample Application</h2> <div ng-app = "mainApp"> <p><a href = "#addStudent">Add Student</a></p> <p><a href = "#viewStudents">View Students</a></p> <div ng-view></div> <script type = "text/ng-template" id = "addStudent.htm"> <h2> Add Student </h2> {{message}} </script> <script type = "text/ng-template" id = "viewStudents.htm"> <h2> View Students </h2> {{message}} </script> </div> <script> var mainApp = angular.module("mainApp", ['ngRoute']); mainApp.config(['$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) { $scope.message = "This page will be used to display add student form"; }); mainApp.controller('ViewStudentsController', function($scope) { $scope.message = "This page will be used to display all the students"; }); </script> </body> </html>
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