Web Development using AngularJS in Quintet, India

AngularJS is a javascript framework which is maintained by Google and it is one of the most popular javascript framework comparable to Backbone JS and EmberJS. AngularJS is mainly used to develop single page web applications and mobile web applications. Javascript being the main client side scripting our expertise in AngularJS becomes relevant and we have developed several web applications using AngularJS. Here we focus on optimizing memory usage and thereby increasing the app performance. When it comes to web app with dynamic content we use all the benefits of AngularJS.

Notable features

• Teach your browser new tricks by adding behavior to HTML tags/attributes
• Controllers provide code-behind DOM with clear separation from the view
• Two-way data binding without the need to extend or wrap the model objects
• Dependency injection assembles the application without ‘main’ method
• Promises/futures remove many callbacks from code when communicating with server
• Form validation
• Strong focus on testability
• Extend HTML with your own behavior

Web Development with AngularJS service at Quintet

The two ways in which we create apps are as follows :

Loading all resources while the app loads.

All javascript and css are included in the main page and will load all necessary files while initializing the app. Once the initialization is done all the required modules are loaded and from there on the loading speed is much faster.

Loading resources dynamically based on the user requested module.

This method will reduce app initialization time. Whenever the app requests for a particular module, resources for that module will be fetched from server thereby increasing the overall speed.

Benefits of using AngularJS

• AngularJS is Flexible with filters.
• AngularJS benefits you, so that you write less and maintainable code
• AngularJS makes web development more fun
• AngularJS does a context aware communication
• AngularJS is unit testing ready thereby beating the traditional way of testing web apps
• With AngularJS your MVC is done right. Angular manages your MVC components for you and serves as the pipeline that connects them.
• AngularJS uses HTML to define the app’s user interface.
• AngularJS makes your code look much cleaner and more intuitive, the way mother nature intended.

Top Features of AngularJS

Two Way Data-Binding

Normal Javascript developers needs to manually update DOM elements and attributes based on model changes. AngularJS has a two-way data-binding which handles the synchronization between the DOM and the model, and vice versa. Developers don’t have to write any code to update the DOM based on model change.

Templates

The Template consists of HTML, CSS and AngularJS directives, Developers can create separate html file to display the data to the users. Template is a dynamic view that user sees in the browser. One of the greatest advantage of this method is designers can work with HTML as they normally would, and then developers take the baton and hook in functionality via bindings with very little effort.

MVC

MVC offers architectural benefits over standard JavaScript — it helps you write better organized, and therefore more maintainable code. AngularJS does not implement MVC in the traditional sense, but rather something closer to MVVM (Model-View-ViewModel).

• Model:- The model is responsible for managing the data of the application. It responds to the request from the view and it also responds to instructions from the controller to update itself.
• View:- A presentation of data in a particular format, triggered by a controller’s decision to present the data. Mainly HTML markup and AngularJS directives.
• ViewModel:- A viewmodel is an object that provides specific data and methods to maintain specific views. In AngularJS viewmodel is scope object that lives within AngularJS applications. The controller sets properties on the scope, and the view binds to those properties. AngularJS takes responsibility for keeping the two in sync.
• Controller:- Controller is responsible for setup the initial state of $scope object, add behaviour to the scope object. And a view will communicate with only controller.

Dependency Injection

Dependency injection is a style of object configuration in which an object fields and collaborators are set by an external entity.

To access a service from AngularJS controller, simply add that service as parameter to the controller. AngularJS will detect that service and will provide an instance of that service to the controller. Dependency injection in AngularJS helps developers to develop application easy with neat code.

Directives

Directives are the most exciting feature of AngularJS. Directives can be used to create custom HTML tags that serve as new, custom widgets. They can also be used to “decorate” elements with behavior and manipulate DOM attributes in interesting ways.

Our Expertise in AngularJS is in

• Filters
• Directives
• Scope changes
• Catching Errors
• Inline Templates
• Form Validation
• Controllers and Routes
• Extending functionalities
• Internationalization
• HTML Views
• Localization
• Data Binding
• Understanding server communication
• Keeping Track of the URL
• Breaking down into components; controllers, views, models, and services