Angular Trending Frameworks of Mobile and Web-based

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General Features
The general features of AngularJS are as follows:

AngularJS is a efficient framework that can create Rich Internet Applications
> AngularJS provides developers an options to write client side applications using
JavaScript in a clean Model View Controller (MVC) way.
> Applications written in AngularJS are cross-browser compliant. AngularJS
automatically handles JavaScript code suitable for each browser.
> AngularJS is open source, completely free, and used by thousands of

Overall, AngularJS is a framework to build large scale, high-performance, and easyto-maintain web applications.


Core Features

Data-binding: It is the automatic synchronization of data between model and
view components.

Scope: These are objects that refer to the model. They act as a glue between
controller and view.
Controller: These are JavaScript functions bound to a particular scope.
Services: AngularJS comes with several built-in services such as $http to
make a XMLHttpRequests. These are singleton objects which are instantiated
only once in app.
Filters: These select a subset of items from an array and returns a new array.
Directives: Directives are markers on DOM elements such as elements,
attributes, css, and more. These can be used to create custom HTML tags that
serve as new, custom widgets. AngularJS has built-in directives such as
ngBind, ngModel, etc.
Templates: These are the rendered view with information from the controller
and model. These can be a single file (such as index.html) or multiple views in
one page using partials.

Routing: It is concept of switching views.
Model View Whatever: MVW is a design pattern for dividing an application
into different parts called Model, View, and Controller, each with distinct
responsibilities. AngularJS does not implement MVC in the traditional sense,
but rather something closer to MVVM (Model-View-ViewModel). The Angular
JS team refers it humorously as Model View Whatever.
Deep Linking: Deep linking allows to encode the state of application in the
URL so that it can be bookmarked. The application can then be restored from
the URL to the same state.
Dependency Injection: AngularJS has a built-in dependency injection
subsystem that helps the developer to create, understand, and test the
applications easily.

The following diagram depicts some important parts of AngularJS which we will
discuss in detail in the subsequent chapters.

Advantages of AngularJS

The advantages of AngularJS are:
> It provides the capability to create Single Page Application in a very clean and
maintainable way.
> It provides data binding capability to HTML. Thus, it gives user a rich and
responsive experience.
> AngularJS code is unit testable.
> AngularJS uses dependency injection and make use of separation of concerns.
> AngularJS provides reusable components.

> With AngularJS, the developers can achieve more functionality with short code.
> In AngularJS, views are pure html pages, and controllers written in JavaScript
do the business processing.
On the top of everything, AngularJS applications can run on all major browsers and
smart phones, including Android and iOS based phones/tablets.


Disadvantages of AngularJS

Though AngularJS comes with a lot of merits, here are some points of concern:

Not secure : Being JavaScript only framework, application written in
AngularJS are not safe. Server side authentication and authorization is must
to keep an application secure.

Not degradable: If the user of your application disables JavaScript, then
nothing would be visible, except the basic page.

AngularJS Directives
The AngularJS framework can be divided into three major 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 binds the AngularJS application data to HTML tags.

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