Angular JS has emerged as one of the most popular front-end frameworks. Companies are hiring Angular JS Development Company and dedicated developers to create attractive and unique frond end designs that enhance user experience.
Here is a comprehensive guide to understanding Angular JS and its different components.
What is Angular JS?
- A cohesive set of features to build a CRUD app
- High-level testability with a range of tests including unit testing and end-to-end testing
What Makes Angular JS Popular?
Angular JS has been developed keeping the CRUD application in consideration, which is also a part of a majority of apps. Its framework revolves around the belief that declarative code is better than imperative code and helpful in building the user interface and interconnecting the software components. A large community of developers and designers is working together, adding to the reliability and credibility of the framework. Companies hire Angular JS developers to develop a unique user interface that attracts users.
A Sample Angular JS Program
Here is a simple ‘hello world’ Angular JS program to give you a basic idea of the app development framework:
Source url: AngularJS Tutorial | What is AngularJS in 2022 - Mindmajix
This program gives the output as ‘ hello world’
Angular JS sticks to HTML to execute data-binding and other features, unlike other frameworks. Let us get into some details of some of the components of the architecture.
1. MVC and MVVM
In Angular JS, we use a Model for data, View for rendering the HTML, and Controller is used to connect both the View and Controller. MVC and MVVM are slightly different, the latter being specifically used to develop the user interface. In MVVM, the presentation layer is part of the View, ViewModel has the presentation logic, and business logic is present in the Model along with the data. MVVM architecture is chosen to simplify data binding.
2. Two-way data-binding
Two-way data binding is responsible for synchronizing Model and View Layers. Changes in the Model are propagated to the View and vice-versa.
3. Dependency injection
It is the design pattern that defines the connection between components and their dependencies.
Angular JS Expressions
Angular JS Directives
These directives are used to extend the capabilities of HTML. They can be customized according to the requirements. Angular JS has many built-in directives including ng-init, ng-controller, ng-show, ng-if, ng-click, ng- disabled, and ng-bind.
Angular JS Scope
It is an in-built object containing the method and data of the application. It acts as the bridge between the controller and the View, facilitating data transfer between them. In Angular JS, various objects can be attached to every controller. This makes the data and objects of one controller different than the others, restricting access to other applications.
Angular JS Events
Every application has several HTML event directories which are used in application development. One or more than one directive is brought together to add HTML listeners to the HTML. The directives are responsible for executing and running different functionalities at every user event.
Angular JS Services
Angular JS Filters
The filters are used to format the available data to display them on the UI without interfering with the original format. A pipe ‘I’ sign is used with an expression or directive to use the filters. Names of some of the important filters are currency, Json, Number, and Date.
Angular JS Controllers
Controllers control the data flow in an application. To define the controller, we use the n-g controller directive. The functions and properties are part of the controller and $scope is the parameter for every controller.
Angular JS Routing
Routing is used to support the development of Single Page Applications and works on the URL. The routing engine catches the URL requested by the user and renders the view.
Testing and workflow
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