Angular JS for beginners

 Keyword: AngularJs


Discover the fundamentals of Angular for beginners with our comprehensive guide.  You will learn how to install AngularJS and create your first single-page apps. 

Introduction

Front-end development framework AngularJs, which is employed to produce single-page apps in Typescript, JavaScript, and HTML. A superset of JavaScript is Typescript. Unlike other JavaScript frameworks, Angular has a lot of features like HTTP services, materials, and animations that let developers create large-scale programs rapidly and effectively.


Angular History


Two developers, Adam Abrons and Misko Hevery, created Angular as a side project. They started the GetAngular project with the goal of enhancing web development and allowing web designers to engage with the frontend and backend. Because HTML employs angular brackets, Adam Abrons, a Google developer who worked on a project with Misko Hevery, named angular after HTML.


Angular Versions


The first to be made available was Angular in 2010. As a result, it is also referred to as angular 1X or the original Angular. The most recent version of Angular 16, version 16, was released in May 2023.


AngularJS features


The popularity of Angular as a software development framework can be attributed to a number of advantages. Among the necessary qualities are some of the following:

  • User Interface


Angular bases its user interface development on HTML, a declarative language that is simple to understand. As a result, AngularJS's user interfaces are sturdy, fluid, and well-structured. The HTML-based user interface also contributes to the success of the web application's deployment.  

  • Simple Routing


The act of routing involves moving to a different page or view. One of the limitations of single-page programs is that they frequently direct the user to a new view each time he clicks on a subcategory. One of the challenges that web developers encounter is this. However, Angular simplifies routing by allowing web designers to construct unique views for unique URLs.

  • Two-Way Binding


Web designers can use Angular to construct templates that make it simple to bind different components with different models. This is an essential feature offered by AngularJS since it constantly updates the model linked to it whenever the values of an HTML or view component change.

Elements for Angular


Before starting with Angular, it would be helpful if you have a firm grasp of the following concepts and programming languages:


  • being comfortable with HTML, CSS, and JavaScript

  • JavaScript events, methods, and error handling

  • fundamental understanding of the Document Object Model (DOM).

  • Model-View-Controller (MVC) concepts

  • Knowledge of Node JS and Node Package Manager (npm)

  • Toggle CLI

  • Rx and JS libraries


Step-1: Installing Angular CLI


You can install Angular CLI by typing the following command in the console or terminal window.

Npm install -g @angular/cli


Using the Angular CLI, you can create library codes, projects, and applications, as well as perform different activities including testing, bundling, and deploying the applications. You can determine the version of your Angular CLI by using the ng-version command.


Step-2: Create a workspace


There are files, programs, libraries, and projects in an angular workspace. Enter the following command in the CLI command to create a new workspace:

ng new my-app


This command ng new creates a workspace with the name "my-app" and installs all necessary packages, files, and dependencies. The following project files are created in this workspace:


  • The root folder is named my-app

  • Skeleton project in the src directory

  • End-to-end test project

  • Other configuration files


The workspace includes the first project and a welcome program. You may now start building your first Angular component and deploying the application.

Concepts of AngularJS


Before beginning to use Angular, there are a few things you need to know:


  • Modules - A module is a container that houses different application components, according to one definition. A collection of functions contained in a JavaScript file make up the module. A module separates an application into manageable, reusable parts.

  • Directives - Directives tell the compiler to change or assign a behavior to a DOM element. Numerous directives are included in Angular JS, including ng-app, ng-controller, ng-view, ng-if, etc.

  • Expressions in Angular JS are written with the symbol, which in HTML denotes a data binding. The HTML templates can incorporate these expressions. While filters are supported by expressions, control flow statements are not.

  • Controller - The JavaScript object constructor method known as "Controller" is used to manage Angular applications.

  • Scope - The JavaScript object known as Scope serves as a link between the Controller and the View. It serves as AngularJS's data source. The Scope object is used for all data assignment and modification.

  • Data binding -  This technique ties both of them together and coordinates the model.

  • Validations -  Angular forms and controls are used to perform validations.

  • Filters - These enable you to expand the functionality of directives and binding expressions as well as display the formatting of data on the DOM in Angular. Filters apply special formatting to the values.

  • Services - Singletons that are used by controllers, directives, and other services.

  • Routing - The service of routing The Routing actions are handled by $routeProvider. It separates the map into different views. It assists in dividing Single applications into various views.

  • Dependency Injection - is a design approach that manages the dependencies of different program components. You can create loosely organized architectures using it.

  • Testing - Dependency Injections' code is put to the test. Karma and some other well-known testing frameworks are two frequently utilized technologies.




Conclusion

After completing this blog, you should have a basic knowledge of Angular. For you to learn Angular the right way, this blog covers Introduction, Installation, MVC, Angular First Application, Directives, Controllers, Expressions, Filters, Tables, DOM, Modules, Forms, Events, Validation, Dependency Injection, Angular API, Includes, Custom Directives, and Angular Application. Additionally, this Angular blog covers real-world Angular use examples. Your first step towards learning Angular is to use it. This blog helps to start basic knowledge of Angular for beginners.

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