mobileNavlogo
headerlogo

Angular Directive

Blog Author

Tekslate

Published Date

19th September, 2018

Ratings

Views

251

  • Share this blog :

AngularJS directives are used to extend HTML. These are special attributes starting with ng- prefix. AngularJS directives are what controls the rendering of the HTML inside an AngularJS application. Directives are a core AngularJS feature.

From the framework directives you will use every day like ng-model or ng-repeat, to your own custom directives that allow you to extend the vocabulary of the browser, if you are learning AngularJS, you need to have a solid understanding of Directives.

Directive types

AngularJS directives are extended HTML attributes with the prefix ng-.

The ng-app directive initializes an AngularJS application.

The ng-init directive initializes application data.

The ng-model directive binds the value of HTML controls (input, select, textarea) to application data.

The ng-repeat directive  repeats html elements for each item in a collection

ng-app:  The root element which automatically initializes or bootstraps the application when web page containing AngularJS Application is loaded. It is also used to load various AngularJS modules in AngularJS Application.

Example: In this example we have defined a default AngularJS application using ng-app attribute of a div element.

<div ng-app = "">

...

</div>

ng-init: It initializes an AngularJS Application data. It is used to put values to the variables to be used in the application.

Interested in mastering AngularJS Training? Enroll now for FREE demo on AngularJS Training.

Example: In this example we have initialize an array of countries. We're using JSON syntax to define array of countries.

<div ng-app = "" ng-init = "countries = [{locale:'en-US',name:'United States'}, {locale:'en-GB',name:'United Kingdom'}, {locale:'en-FR',name:'France'}]">
   ...
</div>

ng-repeat: This directive repeats html elements for each item in a collection.

Example: In this example we've iterated over array of countries.

<div ng-app = "">
   ...
   <p>List of Countries with locale:</p>
   
   <ol>
      <li ng-repeat = "country in countries">
         {{ 'Country: ' + country.name + ', Locale: ' + country.locale }}
      </li>
   </ol>
   
</div>

ng-model: The model/variable to be used in AngularJS Application.

Example: In this example we've defined a model named "name".

<div ng-app = "">

...

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

</div>

Example: In this example, we can see all the above mentioned directives

<html>
   
   <head>
      <title>AngularJS Directives</title>
   </head>
   
   <body>
      <h1>Sample Application</h1>
      
      <div ng-app = "" ng-init = "countries = [{locale:'en-US',name:'United States'}, {locale:'en-GB',name:'United Kingdom'}, {locale:'en-FR',name:'France'}]"> 
         <p>Enter your Name: <input type = "text" ng-model = "name"></p>
         <p>Hello <span ng-bind = "name"></span>!</p>
         <p>List of Countries with locale:</p>
      
         <ol>
            <li ng-repeat = "country in countries">
               {{ 'Country: ' + country.name + ', Locale: ' + country.locale }}
            </li>
         </ol>
      </div>
      
      <script src = "http://ajax.googleapis.com/ajax/libs/angularjs/1.3.14/angular.min.js"></script>
      
   </body>
</html>
 

For an Indepth knowledge on AngularJS, click on below

About Author
Authorlogo
Name

TekSlate

Author Bio

TekSlate is the best online training provider in delivering world-class IT skills to individuals and corporates from all parts of the globe. We are proven experts in accumulating every need of an IT skills upgrade aspirant and have delivered excellent services. We aim to bring you all the essentials to learn and master new technologies in the market with our articles, blogs, and videos. Build your career success with us, enhancing most in-demand skills .

Related Blogs

Write For Us