What is Angular and how is it different from AngularJS?

Angular is a JavaScript-based open-source framework for building web applications. It was developed and maintained by Google and is used for creating single-page applications (SPAs) and dynamic web pages.

AngularJS, on the other hand, is the first version of Angular. AngularJS was released in 2010 and was designed for creating dynamic web pages. It uses a declarative approach for building user interfaces, which makes it easier to understand and maintain the code compared to traditional JavaScript code.

The major difference between Angular and AngularJS is that Angular is a complete rewrite of AngularJS and offers a number of improvements and new features. Some of the key differences include:

1. Architecture: Angular uses a component-based architecture, while AngularJS uses a directive-based architecture. This makes Angular more modular and scalable.
2. Performance: Angular has been optimized for performance and offers improved loading times compared to AngularJS.
3. Mobile support: Angular was designed with mobile devices in mind, while AngularJS was not optimized for mobile devices.
4. Typescript support: Angular is written in TypeScript, a statically typed superset of JavaScript, while AngularJS is written in JavaScript.
5. Testing: Angular offers improved testing capabilities, making it easier to write and run tests for the application.

In conclusion, Angular is a more modern and advanced framework compared to AngularJS, and it is the preferred choice for building web applications today.