AngularJS supports single page applications via multiple views on a single page. To do this AngularJS provides ng-view and ng-template directives, as well as the $routeProvider service.
ng-view
ng-view tag simply creates a placeholder for a corresponding view (HTML or ng-template view) that can be placed according to the configuration.
Use
Define a div and ng-view in the main module.
<div ng-app="mainApp"> ... <div ng-view></div> </div>
ng-template
Theng-template directive is used to create HTML views using script tags. It contains an "id" attribute for the controller view mapped by $routeProvider.
Use
Define the type as a script block for ng-template in the main module.
<div ng-app="mainApp">
...
<script type="text/ng-template" id="addStudent.html">
<h2 id="Add-Student"> Add Student </h2>
{{message}}
</script>
</div>
$routeProvider
$routeProvider is a configuration that groups URLs, maps them to the corresponding HTML page or ng-template, and attaches a controller to the service using the same key.
Use
Define the type as a script block for ng-template in the main module.
<div ng-app="mainApp">
...
<script type="text/ng-template" id="addStudent.html">
<h2 id="Add-Student"> Add Student </h2>
{{message}}
</script>
</div>
Use
Define the script block of the main module and set the routing configuration.
var mainApp = angular.module("mainApp", ['ngRoute']);
mainApp.config(['$routeProvider',
function($routeProvider) {
$routeProvider.
when('/addStudent', {
templateUrl: 'addStudent.html',
controller: 'AddStudentController'
}).
when('/viewStudents', {
templateUrl: 'viewStudents.html',
controller: 'ViewStudentsController'
}).
otherwise({
redirectTo: '/addStudent'
});
}]);
The following are important issues to consider in the above example
- $routeProvider is defined as a configuration function of the mainApp module under '$routeProvider' using keywords;
- $routeProvider maps the URL "/addStudent" to "addStudent.html" when it is defined. addStudent.html should exist in the same path as the main html page. If the htm page is not defined, then ng-template is used with id="addStudent.html". We have used ng-template;
- “otherwise” is the default view used to set;
- “conlloer” is used to set the controller corresponding to the view;
Example
The following example will demonstrate all the above commands.
testAngularJS.html
<html>
<head>
<title>Angular JS Views</title>
<script src="http://ajax.googleapis.com/ajax/libs/angularjs/1.2.15/angular.min.js"></script>
<script src="http://ajax.googleapis.com/ajax/libs/angularjs/1.2.25/angular-route.min.js"></script>
</head>
<body>
<h2 id="AngularJS-Sample-Application">AngularJS Sample Application</h2>
<div ng-app="mainApp">
<p><a href="#addStudent">Add Student</a></p>
<p><a href="#viewStudents">View Students</a></p>
<div ng-view></div>
<script type="text/ng-template" id="addStudent.html">
<h2 id="Add-Student"> Add Student </h2>
{{message}}
</script>
<script type="text/ng-template" id="viewStudents.html">
<h2 id="View-Students"> View Students </h2>
{{message}}
</script>
</div>
<script>
var mainApp = angular.module("mainApp", ['ngRoute']);
mainApp.config(['$routeProvider',
function($routeProvider) {
$routeProvider.
when('/addStudent', {
templateUrl: 'addStudent.html',
controller: 'AddStudentController'
}).
when('/viewStudents', {
templateUrl: 'viewStudents.html',
controller: 'ViewStudentsController'
}).
otherwise({
redirectTo: '/addStudent'
});
}]);
mainApp.controller('AddStudentController', function($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>
Results
Open textAngularJS.html in your web browser. See the results as follows:
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