AngularJS vs. Angular 2 Vs. Angular 4: Key Differences

AngularJS vs. Angular 2 Vs. Angular 4 Key Differences

AngularJS vs. Angular 2 Vs. Angular 4: Key Differences

AngularJS, Angular 2, and Angular 4 are three different types of Angular frameworks.

As we can see, there are a growing number of frameworks in the Web Development sector. The majority of these are regularly updated. In the case of Angular, several upgrades have already been released in the last several years. Google created the original version of AngularJS, which was released in 2009. Angular is the most popular JavaScript framework, with support and adoption from both individuals and businesses. As a result, Angular has improved its versions, such as AngularJS 1.0, Angular 2.0, Angular 4, and others, to accommodate the growing user base. The distinctions between AngularJS, Angular 2, and Angular 4 are discussed in this article on ‘AngularJS versus Angular 2 vs Angular 4.’

Choosing a framework for creating dynamic web and mobile applications is quite difficult. Before we get into the comparison of AngularJS, Angular 2, and Angular 4, it’s important to understand what AngularJS is. ‘What are the different versions, and what are the benefits and downsides of each?’ Continue reading!


  1. What is AngularJS?

AngularJS, often known as Angular 1, is a JavaScript framework that is open-source. This framework is intended for the development of single-page apps. It addresses HTML’s drawbacks while simultaneously implementing library best practices. The following are some of AngularJS’s features:

Model-View-Controller: The MVC architecture is supported by AngularJS, making it simple for developers to create client-side web applications.

Data model binding: It is not necessary to write code to link data to HTML. This will be accomplished by Angular adding a few code lines.

Requires less code: Before Angular, designing an application required a lot of JavaScript code to manipulate the Document Object Model (DOM). For DOM manipulation, Angular requires less code.

Unit testing: Performing testing for each component of an application used to take a long time. The testing method with AngularJS is fairly straightforward. It connects to the programmed via Dependency Injection, which handles and controls everything with ease.

The following are some of AngularJS’s Pros andCons.


  • AngularJS allows for both unit and integration testing.
  • It has a routing feature, which allows you to travel from one view to another.
  • It has two-way binding, so the display layer and data are always in sync.
  • It includes directives that aid the operation of HTML components, giving a web application additional strength.


  • Because AngularJS does not provide server authentication and authorisation, it is less secure.
  • It might create a memory leak, resulting in difficulties like excessive latency, crashing, and slowing down the operation.
  • It has several ways to complete the same work, making it difficult to determine which method is the best.
  • It is not universally supported and is entirely reliant on JavaScript.


  1. What is Angular 2?

The Angular 2 (Angular) framework is a full rewrite of the original AngularJS framework. The Angular team rewrote it from the ground up in TypeScript, with the goal of providing components with enhanced speed and functionality that would aid Web developers. The following are some of Angular 2’s important features:

  • TypeScript: TypeScript is a superset of JavaScript that uses the OOPs idea to boost code efficiency.
  • Components: Angular 2 prioritises components over controllers, which aids in the efficient maintenance of applications over time.
  • Services: It offers a set of code (services) that may be shared among other application components.
  • Cross-platform: We can use Angular to create and execute applications on desktops, iOS, and Android.

Here are some of the advantages and disadvantages of Angular 2.


  • Angular 2 has a simplified routing system and is mobile-friendly.
  • It supports a variety of languages, including TypeScript, Dart, ES6, and ES5.
  • It has improved modularity and dependency injection.


  • When compared to AngularJS, Angular 2 is more difficult to set up
  • It is ineffective for creating tiny, simple web apps.


  1. What is Angular 4?

Angular 4 is a revised version of AngularJS that differs significantly from Angular 2. There have been a few small updates, as well as some new features. TypeScript, which is compatible with JavaScript and produces the same results, is also supported by Angular 4.

Following are some of the key features of Angular 4:

  • Faster and smaller: Programs run faster and take up less space in this version than in previous ones.
  • Animation package: By importing the @angular/platform-browser/animations package, we can quickly locate documents and benefit from auto-completion.
  • Angular Universal: The majority of the universal code can be found in the @angular/platform server’s new render Module Factory function, which includes several code examples and documentation.
  • Compatibility of TypeScript 2.1 and 2.2: The TypeScript version has been improved by the Angular team, allowing for greater type checking across the application.

Following are some of the pros and cons of Angular 4.


  • It enables speedier application development procedures as well as the creation of simple testing.
  • It comes with an animation package that is modular.
  • It’s for single-page web apps that have a better view engine.
  • It has TypeScript support and aids in the development of massive apps.


  • When showing a large quantity of data, the processing is sluggish
  • Testing with Angular 4 is difficult.
  • It does not work with earlier browser versions.
  • Keeping server templating up to date is challenging.

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