MCQ

AngularJS Module

In AngularJS, a module defines an application. It is a container for the different parts of your application like controller, services, filters, directives etc.

A module is used as a Main() method. Controller always belongs to a module.

How to create a module

The angular object's module() method is used to create a module. It is also called AngularJS function angular.module

 <div ng-app="myApp">...</div>
<script>
var app = angular.module("myApp", []); 
</script>

Here, "myApp" specifies an HTML element in which the application will run.

Now we can add controllers, directives, filters, and more, to AngularJS application.

How to add controller to a module

If you want to add a controller to your application refer to the controller with the ng-controller directive.

See this example:

<!DOCTYPE html>
<html>
<script src="http://ajax.googleapis.com/ajax/libs/angularjs/1.4.8/angular.min.js"></script>
<body>
<div ng-app="myApp" ng-controller="myCtrl">
{{ firstName + " " + lastName }}
</div>
<script>
var app = angular.module("myApp", []);
app.controller("myCtrl", function($scope) {
    $scope.firstName = "Ajeet";
    $scope.lastName = "Maurya";
});
</script>
</body>
</html>

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How to add directive to a module

AnglarJS directives are used to add functionality to your application. You can also add your own directives for your applications.

Following is a list of AngularJS directives:

Directive	Description
ng-app	It defines the root element of an application.
ng-bind	It binds the content of an html element to application data.
ng-bind-html	Itbinds the innerhtml of an html element to application data, and also removes dangerous code from the html string.
ng-bind-template	It specifies that the text content should be replaced with a template.
ng-blur	It specifies a behavior on blur events.
ng-change	It specifies an expression to evaluate when content is being changed by the user.
ng-checked	It specifies if an element is checked or not.
ng-class	It specifies css classes on html elements.
ng-class-even	It is same as ng-class, but will only take effect on even rows.
ng-class-odd	It is same as ng-class, but will only take effect on odd rows.
ng-click	It specifies an expression to evaluate when an element is being clicked.
ng-cloak	It prevents flickering when your application is being loaded.
ng-controller	It defines the controller object for an application.
ng-copy	It specifies a behavior on copy events.
ng-csp	It changes the content security policy.
ng-cut	It specifies a behavior on cut events.
ng-dblclick	It specifies a behavior on double-click events.
ng-disabled	It specifies if an element is disabled or not.
ng-focus	It specifies a behavior on focus events.
ng-form	It specifies an html form to inherit controls from.
ng-hide	It hides or shows html elements.
ng-href	It specifies a URL for the <a> element.
ng-if	It removes the html element if a condition is false.
ng-include	It includes html in an application.
ng-init	It defines initial values for an application.
ng-jq	It specifies that the application must use a library, like jQuery.
ng-keydown	It specifies a behavior on keydown events.
ng-keypress	It specifies a behavior on keypress events.
ng-keyup	It specifies a behavior on keyup events.
ng-list	It converts text into a list (array).
ng-model	It binds the value of html controls to application data.
ng-model-options	It specifies how updates in the model are done.
ng-mousedown	It specifies a behavior on mousedown events.
ng-mouseenter	It specifies a behavior on mouseenter events.
ng-mouseleave	It specifies a behavior on mouseleave events.
ng-mousemove	It specifies a behavior on mousemove events.
ng-mouseover	It specifies a behavior on mouseover events.
ng-mouseup	It specifies a behavior on mouseup events.
ng-non-bindable	It specifies that no data binding can happen in this element, or it's children.
ng-open	It specifies the open attribute of an element.
ng-options	It specifies <options> in a <select> list.
ng-paste	It specifies a behavior on paste events.
ng-pluralize	It specifies a message to display according to en-us localization rules.
ng-readonly	It specifies the readonly attribute of an element.
ng-repeat	It defines a template for each data in a collection.
ng-required	It specifies the required attribute of an element.
ng-selected	It specifies the selected attribute of an element.
ng-show	It shows or hides html elements.
ng-src	It specifies the src attribute for the <img> element.
ng-srcset	It specifies the srcset attribute for the <img> element.
ng-style	It specifies the style attribute for an element.
ng-submit	It specifies expressions to run on onsubmit events.
ng-switch	It specifies a condition that will be used to show/hide child elements.
ng-transclude	It specifies a point to insert transcluded elements.
ng-value	It specifies the value of an input element.

How to add directives

See this example:

<!DOCTYPE html>
<html>
<script src="http://ajax.googleapis.com/ajax/libs/angularjs/1.4.8/angular.min.js"></script>
<body>

<div ng-app="myApp" w3-test-directive></div>
<script>
var app = angular.module("myApp", []);
app.directive("w3TestDirective", function() {
    return {
        template : "This is a directive constructor. "
    };
});
</script>
</body>
</html>

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Modules and controllers in file

In AngularJS applications, you can put the module and the controllers in JavaScript files.

In this example, "myApp.js" contains an application module definition, while "myCtrl.js" contains the controller:

See this example:

<!DOCTYPE html>
<html>
<script src="http://ajax.googleapis.com/ajax/libs/angularjs/1.4.8/angular.min.js"></script>
<body>
<script src="myApp.js"></script>
<script src="myCtrl.js"></script>
</body>
</html>

Here "myApp.js" contains:

app.controller("myCtrl", function($scope) {
    $scope.firstName	= "Ajeet";
    $scope.lastName= "Maurya";
}); 

Here "myCtrl.js" contains:

<div ng-app="myApp" ng-controller="myCtrl">
{{ firstName + " " + lastName }}
</div>

This example can also be written as:

<!DOCTYPE html>
<html>
<body>
<script src="http://ajax.googleapis.com/ajax/libs/angularjs/1.4.8/angular.min.js"></script>
<div ng-app="myApp" ng-controller="myCtrl">
{{ firstName + " " + lastName }}
</div>
<script>
var app = angular.module("myApp", []);
app.controller("myCtrl", function($scope) {
    $scope.firstName = "Ajeet";
    $scope.lastName = "Maurya";
});
</script>
</body>
</html>

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