AngularJS (also written as angularjs) is a front-end framework for open source web applications based on JavaScript, mainly maintained by Google and a community of individuals and legal entities to solve many of the challenges encountered in developing one-page applications. JavaScript compliment Apache Cordova, a framework used to develop cross-platform mobile applications. Its purpose is to simplify both the development and testing of such applications by providing a framework for the MVC (MVC) and view-model view (MVVM) client-side architectures, along with components commonly used in rich Internet applications. (This flexibility led to the acronym MVW, which means “model-view-whatever” and can also encompass model-view-presenter and model-view-adapter). In 2014, the original team of AngularJS began working on the application of the Angular platform.
The AngularJS framework works by first reading the HTML page, which has additional custom tag attributes embedded. Angular interprets these attributes as directives to join parts of the page’s input or output to a template represented by standard JavaScript variables. The values of these JavaScript variables can be set manually in code or retrieved from static or dynamic JSON resources.
According to the Libscore JavaScript analytics service, AngularJS used Wolfram Alpha sites, NBC, Walgreens, Intel, Sprint, ABC News and other sites a proven 12,000 million in October 2016.
AngularJS is the front of the Mean stack, consisting of a MongoDB database, under the Express.js web application server, the angularjs itself and the Node.js. server execution environment.
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Features of AngularJS
The following are the most important features of AngularJS:
Data link: Automatic data synchronization between model and view components. When the model changes, it is automatically reflected in the view and vice versa. DOM manipulation is easy because of the data link.
Scope: Scope is an object that refers to the application template. Scope act as a link between the controller and the view.
Driver: Javascript functions are linked to a specific scope and the view is linked to a specific driver. Each view must be bound to a particular controller.
Services: AngularJS has many integrated services. For example, $ http to make an AJAX request. We can create our own services according to our needs and access this service throughout our application. The service must be injected while in use.
Filters: Filters are used to transform data. They select a subset of elements from an array and return a new array.
Policies: Policies are one of the best features of AngularJS. We can create custom HTML tags and provide custom behaviour for tags. ngModel, ngShow, ngHide are the example of angular-based directives.
Templates: rendered views with controller and model information. These can be a single file or multiple views on a page using “partial”.
Routing: To change views, routing is used. Integrated services are available for routing.
Model View: MVC is a design pattern for splitting an application into different parts (called Model, View, and Controller), each with different responsibilities. not AngularJS implement MVC in the traditional sense, but something closer to MVVM (Model-View-ViewModel). The Angular JS team refers to her with humour as Model View Whatever.
Dependency Injection: AngularJS has built-in dependency injection support. Help the developer to reuse components. We can create our module and inject it into our application.
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Advantage of AngularJS
There are many JavaScript frameworks for building web applications. So, it’s a genuine question, why use the AngularJS.
The following are the advantages of AngularJS over other JavaScript frameworks:
Bidirectional Data Link: AngularJS creates a bidirectional data link between the selected element and the orderProp model. orderprop is used as input for the orderBy filter.
Test: Angular JS is designed so we can perform tests from the beginning. Therefore, it is very easy to test any of its components through unit testing and extreme testing.
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