What framework is AlloyUI built on?

AlloyUI is built on YUI3, which is a JavaScript framework developed by Yahoo for building rich web applications. YUI3 provides a robust set of utilities and components that make it easier for developers to work with JavaScript in a modular and organized manner. AlloyUI extends the capabilities of YUI3 by providing additional UI components, widgets, and frameworks specifically designed for Liferay applications, enhancing the user experience with additional functionalities.

The integration of AlloyUI with YUI3 also enables developers to create more interactive and dynamic interfaces while leveraging the strengths of the underlying YUI libraries, such as better performance and enhanced compatibility across different browsers. This choice allows developers using Liferay to build applications with rich, user-friendly interfaces while maintaining a clean and maintainable codebase.

The other frameworks mentioned, like jQuery, React, and AngularJS, offer different paradigms and approaches to building web applications. jQuery is primarily a library that simplifies HTML document traversing and manipulation, while React and AngularJS are modern frameworks with their own architectures, focusing on building component-based user interfaces. However, these frameworks are not the foundation upon which AlloyUI is built, making YUI3 the correct answer.