Understanding the Contrast Between Angular 2 and Angular 4

Jone marco
3 min readMay 27, 2024


Angular, the popular front-end framework, has evolved significantly over the years, with each version introducing new features and improvements. In this article, we’ll dissect the key differences between Angular 2 and Angular 4, shedding light on their unique characteristics and functionalities.

Angular 2: The Foundation of Modern Web Development

Angular 2 marked a major overhaul of the Angular framework, introducing a plethora of enhancements and innovations. Here are some key highlights of Angular 2:

  • Component-Based Architecture: Angular 2 embraced a component-based architecture, making it easier to build complex applications by breaking them down into smaller, reusable components.
  • Improved Performance: Angular 2 boasted significant performance improvements compared to its predecessor, thanks to features like ahead-of-time (AOT) compilation and a streamlined change detection mechanism.
  • Enhanced Dependency Injection: Dependency injection in Angular 2 was revamped to provide better support for modularization and code organization, making it easier to manage dependencies within an application.

Angular 4: Building on the Foundation

Angular 4, while not a complete overhaul like Angular 2, introduced several noteworthy features and optimizations. Here’s what sets Angular 4 apart:

  • Smaller Bundle Sizes: One of the key focuses of Angular 4 was to reduce bundle sizes and improve load times. This was achieved through various optimizations, including better tree-shaking and the introduction of the ngIf structural directive.
  • Animation Package: Angular 4 introduced the @angular/animations package, providing a robust platform for creating animations within Angular applications. This package simplified the process of adding animations to components and UI elements.
  • HttpClient Module: Angular 4 replaced the deprecated Http module with the new HttpClient module, offering a more streamlined API for making HTTP requests. This module provided improved error handling, support for interceptors, and other advanced features.

Angular 2 vs. Angular 4: A Quick Comparison

To summarize the differences between Angular 2 and Angular 4, let’s take a look at a comparison table:

## Comparison of Angular 2 and Angular 4 Features

| Feature | Angular 2 | Angular 4 |
| Component-Based Architecture | Introduced | Continued |
| Performance | Significant improvements | Bundle size optimizations, faster load times |
| Dependency Injection | Enhanced support | Continued improvements |
| Animation Package | Not included | Introduced |
| HttpClient Module | Not included | Introduced |

Conclusion: Choosing the Right Angular Training

Understanding the differences between Angular 2 and Angular 4 is crucial for developers looking to stay up-to-date with the latest trends in web development.

Whether you’re embarking on Angular training or seeking the best Angular course, it’s essential to choose resources that cover the latest version of the framework to ensure you’re equipped with the most relevant skills and knowledge.

By staying informed about the evolution of Angular and continuously updating your skills, you can position yourself as a proficient Angular developer capable of building modern and efficient web applications.