ANGULARJS FIRST APPLICATION ~ Web Tech

Before we start with creating actual HelloWorld application using AngularJS, let us see what are the actual parts of a AngularJS application. An AngularJS application consists of following three important parts

ng-app : This directive defines and links an AngularJS application to HTML.
ng-model : This directive binds the values of AngularJS application data to HTML input controls.
ng-bind : This directive bidns the AngularJS Application data to HTML tags.

Steps to create AngularJS Application

Step 1: Load framework

Being a pure JavaScript framework, It can be added using <Script> tag.

<script src="http://ajax.googleapis.com/ajax/libs/angularjs/1.3.14/angular.min.js">
</script>

Step 2: Define AngularJS Application using ng-app directive

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

Step 3: Define a model name using ng-model directive

<p>Enter your Name: <input type="text" ng-model="name"></p>

Step 3: Bind the value of above model defined using ng-bind directive.

<p>Hello <span ng-bind="name"></span>!</p>

Steps to run AngularJS Application

Use above mentioned three stpes in an HTML page.

testAngularJS.htm

<html>
<title>AngularJS First Application</title>
<body>
<h1>Sample Application</h1>
<div ng-app="">
   <p>Enter your Name: <input type="text" ng-model="name"></p>
   <p>Hello <span ng-bind="name"></span>!</p>
</div>
<script src="http://ajax.googleapis.com/ajax/libs/angularjs/1.3.14/angular.min.js"></script>
</body>
</html>

Output

Open textAngularJS.htm in a web browser. Enter your name and see the result.

How AngularJS integrates with HTML

ng-app directive indicates the start of AngularJS application.
ng-model directive then creates a model variable named "name" which can be used with the html page and within the div having ng-app directive.
ng-bind then uses the name model to be displayed in the html span tag whenever user input something in the text box.
Closing</div> tag indicates the end of AngularJS application.

Web Tech

Thursday, 21 May 2015

ANGULARJS FIRST APPLICATION