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Before creating actual Hello World ! application using AngularJS, let us see the parts of a AngularJS application. An AngularJS application consists of following three important parts −
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ng-app − This directive defines and links an AngularJS application to HTML.
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ng-model − This directive binds the values of AngularJS application data to HTML input controls.
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ng-bind − This directive binds the AngularJS Application data to HTML tags.
Creating AngularJS Application
Step 1: Load framework
Being a pure JavaScript framework, it can be added using <Script> tag.
<script src = "https://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 4: Bind the value of above model defined using ng-bind directive
<p>Hello <span ng-bind = "name"></span>!</p>
Executing AngularJS Application
Use the above-mentioned three steps in an HTML page.
testAngularJS.htm
<html> <head> <title>AngularJS First Application</title> </head> <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 = "https://ajax.googleapis.com/ajax/libs/angularjs/1.3.14/angular.min.js"> </script> </body> </html>
Output
Open the file testAngularJS.htm in a web browser. Enter your name and see the result.
How AngularJS Integrates with HTML
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The ng-app directive indicates the start of AngularJS application.
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The ng-model directive creates a model variable named name, which can be used with the HTML page and within the div having ng-app directive.
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The ng-bind then uses the name model to be displayed in the HTML <span> tag whenever user enters input in the text box.
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Closing</div> tag indicates the end of AngularJS application.
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