Uses of Angular JS
Angular JS is a JavaScript-based open-source front-end web application framework, maintained by Google and by a community of individuals and corporations to address many of the challenges encountered in developing single-page applications.
Before learning why it is used for and some of its functionalities we will discuss few things about Uses of AngularJS which one should know. Angular JS was created in 2009 as a side project by two developers, Misko Hevery and Adam Abrons.
The two had originally started the project to build an end-to-end tool that allowed web designers to interact with both the frontend and the backend. It is written in JavaScript.
Angular JS is not a programming language, but rather a JavaScript framework for single-page applications. By SINGLE PAGE APPLICATION (SPA) it means that Angular JS is a powerful JavaScript framework for building dynamic web applications. The good thing and the reason about Angular to be popular in the market is that it has a set of ready-to-use modules to simplify building of single page applications.
Angular JS follows the MVC structure. We all know MVC stands for Model View Controller and is one of the popular software design patterns for developing web applications. Now there comes a question that what is Model View and Controller actually represents in Angular JS.
Model − It is the lowest level of the pattern responsible for maintaining data.
Controller –It is the components and directives. We will discuss this in later sections.
View – The template (HTML) processed by Angular and the browser comes under the view.
Angular JS has many features which we are going to discuss later in the section. Out of its many features, features like data binding and dependency injection eliminate much of the code currently one has to write without using Angular JS and it all happens within the browser, which makes it an ideal partner with any server technology.
A pictorial representation some important parts of Angular JS.
Source: Internet
Features and uses of Angular JS
There are several benefits of using Angular JS. Please find the below sections, where Angular JS has been used widely and effectively. Below is the list of top uses of Angular JS.
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Directives
Directives are markers on DOM elements (such as elements, attributes, CSS, and more). Angular JS has a set of built-in directives which offers functionality to your applications. We can also create our own directives in Angular JS. Some of the built-in directives are as follows:
ng-app, ng-init, ng-model.
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Data-binding
It is the synchronization between the model and the view. ng-bind and ng-model directives provide the functionality of data-binding.
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Scope
These are objects that refer to the model.
The scope is the binding part between the HTML (view) and the JavaScript (controller). It is an object with the available properties and methods and is available for both the view and the controller. So, in short, it is the connecting part between a controller and the view. A scope is used with $scope in Angular JS.
Note: if we make a controller and an argument to be passed, it is possible with a $scope. Then only the view (HTML) gets access to these properties.
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Controller
Angular JS controllers control the data of Angular JS applications. Controllers are regular JavaScript Objects. applications of Angular JS are controlled by controllers. In Angular JS the controller is defined with ng-controller
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Services
A service is a function, or object, that comes with Angular JS. We can also make out service for the application of Angular JS. The scope of the service is limited to the application of Angular JS.
There are almost 30 inbuilt services available with Angular JS.
Examples:
$location: It is nothing but an alternative to “widow.location” what we do in HTML.
$http: It makes a request to the server, and lets the application handle the response.
Let’s move to another use of Angular JS.
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Filters
Filters are used in Angular JS to format data. We can also create our own filters by registering a new filter factory function with your module. Followings are few filters provided by Angular JS:
currency, date, filter, json, limitTo, lowercase, number, orderBy, uppercase.
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Templates
It provides the viewer with information from the controller and model.
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Routing
It helps to switch views. In Angular JS application with ngRoute modules helps the application to switch to different pages without loading the entire application.
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Model View
As it is already explained above that Model the lowest level of the pattern responsible for maintaining data and View represents the template (HTML) processed by the angular application and the browser.
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Deep Linking
It allows encoding the state of an application in the URL so that it can be bookmarked. The application of Angular JS can then be restored from the URL to the same state
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Dependency Injection
Dependency Injection is a software designing pattern which deals with how components get hold of their dependencies.
In Angular JS, injector subsystem is responsible for creating the component, resolving their dependencies and providing the dependencies to other components as required.
Advantages of Angular JS
Angular JS has the following are the few advantages which could be beneficial of choosing Angular JS rather than some other alternatives:
- Simple and Improved Design Architecture.
- DOM manipulation.
- Lesser code to write.
- Improve Development Efficiency.
- Code Reusability.
- A code is Unit Testable.
- Allow Dependency Injection.
- Two-way data binding.
- Ability to create custom directives.
- Provision for filters.
Disadvantages of Angular JS
As a coin has two sides, similarly it has some disadvantages along with it many advantages.
Following are the few disadvantages of Angular JS which one should keep in mind before choosing Angular JS.
- Not Secure. Server-side authentication and authorization are required to keep the application secure.
- Not degradable. It means that if the JavaScript is disabled then the viewer will see the basic pages.
- JavaScript support is mandatory.
- Difficulty in learning.
Conclusion – Uses Of Angular JS
So we have learned uses of Angular JS and some basics information about Angular JS. We have also come across its few of the many parts of it, which help us to learn some knowledge about it. We have also come across its pros and cons of it which one should keep in mind which choosing Angular JS for the application. It is one of the trending market technologies in today’s world.
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