AngularJs is a JavaScript-based front-end development framework, which is used to build single-page applications in HTML, JavaScript, and in a superset of JavaScript called Typescript. Compared to other JavaScript frameworks, Angular provides various features like HTTP service, materials, and animations which helps the developer to create large applications and saves their time writing lengthy codes.

This part of AngularJS tutorials will be covering the following topics:

AngularJS for Beginners

This AngularJS tutorial includes Introduction, Installation, MVC, AngularJS First Application, Directives, Controllers, Expressions, Filters, Tables, DOM, Modules, Forms, Events, Validation, Dependency Injection, AngularJS API, Includes, Custom Directives, AngularJS Application so you learn AngularJS the right way. This AngularJS tutorial also includes practical use cases of AngularJS. This AngularJS is your first step to learn AngularJS.

This technology has gained immense popularity because of the following reasons:

  • AngularJS applications are supported by different browsers
  • Uses data-binding for providing synchronization between model and view layers
  • Incorporates the concepts of various languages including JavaScript and server-side languages.

Angular History

Angular was created by two developers named Adam Abrons and Misko Hevery as a side project. They envisioned the project GetAngular with an aim to simplify web development and allow web designers to interact with both backend and frontend. Misko Hevery was a developer at Google, while Adam Abrons who was working with Hevery on a Google project, named angular after HTML as  HTML contains angular brackets.

Hevery was working on a Google project named Google Feedback with two more developers in the team. Over 6 months, they’ve written 17000 lines of code. However, with the increased code size, it became very difficult to modify and test the code which the team has written. So, Henry bet his manager that he can write the entire project with his side project in just two weeks. 

He lost the bet and took three weeks to finish writing the code, but he was able to squeeze the 17000 lines code down to 1500. His manager took notice of his achievement and the development of Angular.js began to accelerate. 

Why Angular?

Angular is one of the most popular JavaScript-based web development frameworks and used by many software engineers to create web applications. According to the Stack-Overflow developers survey from 2017, more than 44% of web designers and developers use Angular for creating user interfaces. But why is Angular so popular? Well, below are some of the reason why is it so:

  • Angular apps are built using the TypweScript language, which eliminates the errors while writing the codes and ensures high performance and security.
  • Provides two-way binding that provides a seamless synchronization between the modes and the view. It updates these components in real-time, in case the data is modified. 
  • The time investment in Angular for the projects is less as compared to other web development frameworks. The Angular CLI tool allows the developers to create initial projects, perform testing, and integrate features in the same.
  • The Angular view engine takes templates you’ve written and compiles them into HTML and JavaScript files so that the browser can read them. 
  • Reduce development time as Angular uses HTML to define the User-interface of an application, which is less complex as compared to JavaScript.

Check out the Angular Interview Questions if you’re preparing for a job interview.

Angular vs. Node.js

Below are the key differences between Angular and Node.js frameworks:

Angular Node.js
It’s an open-source web development framework from Google. It’s a cross-platform environment for applications written in JavaScript. 
Written entirely in JavaScript, but allows extending HTML syntax in the applications. Written in C, C++, and JavaScript but supports event-driven architecture and non-blocking APIs.
Angular is best suited for building single-page web applications.  Used for building fast and scalable server-side applications.
Angular is itself a JavaScript web application development framework. Has different frameworks like Express.js, Sails.js, and Partal.js.
Used to create interactive web applications Used in the development of small-scale projects
Useful for creating real-time applications like messengers Used in situations where fast and scalable development is required

How is AngularJS better than jQuery?

This is quite a common comparison while jQuery is a DOM manipulation library that uses JavaScript, AngularJS is a JavaScript framework designed to generate SPAs for web development. Both the technologies have gained immense popularity, but before opting for technology for web development the programmer should have a clear knowledge about these two concepts. Let’s get to know which technology should you opt for and when:

Criteria AngularJS jQuery
Built for Built  for Single Page Apps Built mainly for DOM Manipulation
Interactivity Provides a lot of interactivity Provides little interactivity
Structure Has a framework No structure

Watch this insightful video on Angular vs React vs Vue:

AngularJS Tutorial - Learn Programming with AngularJS from Experts

Versions of Angular 

Angular1.0 was the first version of Angular and was released in the year 2010. After that, Angular2.0 was introduced in 2014 and it was a complete rewrite of the previous version, but it created a controversy among the developers. In April 2015, the developers moved angularly from the alpha to the developer’s preview and launched a beta version in December 2015. 

Angular 3 was skipped due to some confusion and Angular 4 was released in the year 2017. 

It was smaller in size and came with additional features like HttpClient and also supported conditionally disabled animations. Angular 5 was released at the end of 2017 with a minor update. 

The next version, Angular 6 was released on May 4th, 2018. It came with major updates and features like CLI workspace, library support, ng add, ng update, Angular material starter components, Angular element, etc. However, Angular 7 was released in October 2018 which improved both the performance and efficiency of the framework. 

Following the trend, Angular 8 was released in May 2019, Angular 9 in February 2010, Angular 10 in June 2020, and Angular 11 in November 2020, which is the latest version of Angular. 

Features of Angular

Angular framework supports multiple platforms which help the developers to create different types of applications Desktop, Native, and Progressive web applications. Angular provides great performance for the following reasons:

  • Code Splitting: With the help of component routing, the user can perform automatic code-splitting. So, only the code required to render is loaded.
  • Universal Support: Angular can be used with various programming languages for front-end development and servers for near-instant rendering in HTML.
  • Productivity: Angular provides powerful templates for quick UI creation and Angular CLI offers command-line tools for faster development and deployment.
  • Accessibility: Angular provides ARIA-enabled components, built-in testing architecture, and developer guides to create accessible applications.
  • Animation Support: Create high-performance animation timelines by writing less code.
  • Testing: Check your codes using the Angular testing runners, Karma and Jasmine. In Angular, Jasmine is used for unit testing, whereas Karma is a JavaScript test runner. 

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AngularJS vs. Angular

Below are the key differences between AngularJS and Angular:

Key AngularJS Angular
Language Written in Javascript Written in typescript
Architecture Based on MVC, Model View Controller architecture Use components and derivatives
Dependency Injection(DI) DI is not used  Angular uses Hierarchical DI
Mobile Developed applications are not mobile-friendly. Developed applications are mobile-friendly.
Management Difficult to manage projects with huge source codes The codes are well structured, which makes bigger projects easy to manage.

Watch the Youtube video to learn more about Angular JS vs. Angular:

AngularJS Tutorial - Learn Programming with AngularJS from Experts

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Getting Started with Angular

Angular is used to build single-page applications and features with declarative templates. The developers can build the applications and reuse the code to build other applications. Angular has a learning curve similar to a hockey stick, which means starting with the framework is easy. However, building complex applications require more effort and understanding of Angular’s framework. 

Let’s check the prerequisites to install and start using the Angular framework:

Prerequisites for Angular

Before starting with Angular, it’s better if you have sound knowledge of the following concepts and languages:

  • Knowledge of HTML, CSS, and JavaScript
  • JavaScript functions, error handling, and events
  • Basic knowledge of the Document Object Model(DOM)
  • Model-View-Controller(MVC) concepts
  • Knowledge of Node JS and Node Package Manager(npm)
  • Angular CLI
  • Libraries such as Rx and JS
  • Error handling

System Requirements

  • Windows 10 or similar Operating System
  • At least 10GB of free storage space
  • Minimum 4GB of RAM
  • An editor like VSCode to write ad edit your codes
  • Node JS version 8 or 10, preinstalled in your system. You can check the Node.js version using the node -v command

Step-1: Installing Angular CLI

You can install Angular CLI using the console/terminal window by entering the following command:

Npm install -g @angular/cli

The angular CLI is used to create library codes, projects, and applications and perform various tasks like testing, bundling, and deploying the applications. You can verify the version of your Angular CLI with the ng –version command. 

Step-2: Create a workspace

An angular workspace contains the files, codes, libraries, and projects. To create a new workspace, type in the following statement in the CLI command:

ng new my-app

This command ng new installs all the necessary packages, files, and dependencies and creates a workspace by the name ‘my-app.’ In this workspace, the following project files are created:

  • Root folder names my-app
  • Skeleton project in the src directory
  • End-to-end test project
  • Other configuration files

The workspace contains the initial project with a welcome application. Now, you’re ready to create your first Angular component and serve the application. 

Check our Web Technology Community if you have any doubts or queries in Angular.

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