Difference Between Angular and AngularJS

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When it comes to web development, Angular and AngularJS are two popular frameworks that often confuse developers due to their similar names. While both frameworks are used for building dynamic web applications, there are significant differences between Angular and AngularJS. In this blog post, we will explore these differences and help you understand which framework might be the best fit for your project.


  • AngularJS follows MVC architecture, Angular follows a component-based architecture.
  • AngularJS uses JavaScript, Angular uses TypeScript.
  • Angular has better performance due to optimized mechanisms.
  • Angular provides more advanced tooling like Angular CLI.
  • Angular offers superior mobile support with Angular Universal and Mobile Toolkit.

What is AngularJS?

AngularJS, also known as Angular 1.x, was released by Google in 2010. It is a JavaScript-based open-source framework that allows developers to build dynamic web applications. AngularJS uses two-way data binding, which means that any changes made in the user interface are automatically reflected in the underlying data model, and vice versa.

One of the key features of AngularJS is its use of directives. Directives are HTML attributes or elements that extend the functionality of HTML and enable developers to create reusable components. AngularJS also provides built-in support for dependency injection, allowing for more modular and testable code.

What is Angular?

Angular, also known as Angular 2+, is a complete rewrite of AngularJS and was released in 2016. Unlike AngularJS, Angular is not backward compatible, meaning that applications built with AngularJS cannot be directly migrated to Angular without significant changes.

Angular is a TypeScript-based framework that focuses on component-based architecture. It uses a hierarchical dependency injection system and provides a more streamlined and efficient development experience. Angular also introduces a more modern and efficient change detection mechanism, resulting in improved performance.

Key Differences:

1. Language: AngularJS uses JavaScript, while Angular uses TypeScript. TypeScript is a superset of JavaScript that adds static typing and other features, making the code more robust and maintainable.

2. Architecture: AngularJS follows the MVC (Model-View-Controller) pattern, whereas Angular follows the component-based architecture.

3. Performance: Angular performs better than AngularJS due to its improved change detection mechanism and optimized rendering process.

4. Size: AngularJS is relatively smaller in size compared to Angular. Angular includes a lot of additional features and dependencies, which makes it larger in size.

5. Mobile Development: Angular has better support for mobile development, including features like native mobile app development, progressive web apps, and hybrid app development.

Which One to Choose?

The choice between Angular and AngularJS depends on various factors, such as project requirements, team expertise, and long-term goals. If you are starting a new project or looking to migrate an existing AngularJS project, it is recommended to choose Angular as it offers better performance, improved tooling, and a more modern development experience.

However, if you have an existing AngularJS project that is stable and does not require major updates, there may not be a strong need to migrate to Angular. AngularJS still has a large community and a vast number of resources available, making it a viable option for certain scenarios.

In summary, Angular and AngularJS are both powerful frameworks for building dynamic web applications. While AngularJS is the older version and uses JavaScript, Angular is a complete rewrite that uses TypeScript and provides better performance and a more modern development experience. The choice between the two frameworks depends on project requirements and long-term goals. It is important to carefully consider these factors before deciding which framework to use.

Regardless of your choice, both Angular and AngularJS have vibrant communities and extensive documentation, ensuring that you will have the support you need throughout your development journey.

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