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.
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.
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.
Advantage of AngularJS
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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