AngularJS vs Angular 2 vs Angular 4 vs Angular 5 : The difference? Which one to use and when?

 

angularjs development company

If you're considering constructing a dynamic web application, Selecting the right scheme is crucial.

An AngularJS development company can assist you adopt the best rendition for your project. But with so many versions, which one should you use?

Let's burst it down clearly.

What is AngularJS?

Angular Development Company

AngularJS, launched in 2010 by Google, was the first form of the Angular scheme. It is an open-source JavaScript scheme

mostly used for producing single-page applications (SPAs). However, as innovation acquired, its damper led to the

development of newer Angular versions.

What Changed in Angular 2, 4, and 5?

Each new Angular version introduced enhancements for performance, structure, and usability:

  • Angular 2 (2016):A conclusive revision of AngularJS, using TypeScript alternative of JavaScript.

  • Angular 4 (2017): better fulfillment, abate bundle size, and better enliven features.

  • Angular 5 (2017): Optimized build processes, faster execution, and enhanced progressive web app (PWA) support.

Key Differences Between Angular Versions

Feature

AngularJS

Angular 2

Angular 4

Angular 5

Language

JavaScript

TypeScript

TypeScript

TypeScript

Architecture

MVC

Component-based

Component-based

Component-based

Speed

Slower

Faster

Faster

Faster

Mobile Support

No

Yes

Yes

Yes

SEO Friendly

Limited

Better

Improved

Best

Which One to Use and When?

  • Use AngularJS if you have an old project that needs minor updates without a complete rewrite.

  • Use Angular 2 for projects requiring modern architecture but not the latest features.

  • Use Angular 4 if you need improved speed and reduced bundle sizes.

  • Use Angular 5 if you want top performance, SEO benefits, and PWA support.

Pros and Cons of Each Angular Version

AngularJS

Pros:

  • Easy to learn for beginners.

  • Simple MVC architecture.

Cons:

  • Performance issues with large applications.

  • Limited mobile and SEO support.

Angular 2

Pros:

  • Component-based architecture for better maintainability.

  • TypeScript integration improves development speed.

Cons:

  • Steep learning curve compared to AngularJS.

  • No backward compatibility with AngularJS.

Angular 4 & 5

Pros:

  • Faster, more efficient applications.

  • Reduced bundle sizes and improved performance.

  • Built-in PWA support (Angular 5).

Cons:

  • Requires migration effort from AngularJS.

  • Learning curve for new developers.

How to Migrate from AngularJS to Angular 5

Migrating from AngularJS to Angular 5 is a multi-step process:

  1. Analyze Your Codebase – Identify dependencies and outdated libraries.

  2. Use Angular Upgrade Module – The ngUpgrade library helps run AngularJS and Angular side by side.

  3. Rewrite Components – Convert AngularJS controllers and directives to Angular components.

  4. Migrate Services and Routing – Update the dependency injection system and use Angular’s RouterModule.

  5. Test and Optimize – Ensure functionality remains intact and optimize performance.

Benefits of Using the Latest Angular Versions

  • Improved Performance – Faster loading and optimized execution.

  • Better Security – Regular updates and patches.

  • Scalability – Easy to manage and expand projects.

Conclusion

Choosing the right Angular version depends on your project requirements. An AngularJS development company can lead you

through the best options. Whether you’re keep an old app or building a new one, acceptable to the latest

Angular version assure better performance and scalability. Looking for expert guidance?

Contact an Angular Development Company today! For top-notch Angular solutions, trust Imenso software to bring your vision to life.


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