What is the purpose of JavaScript frameworks like React or Angular?

JavaScript frameworks like React and Angular are specifically designed to facilitate the development of dynamic and interactive user interfaces. They provide developers with a structured and organized way to build web applications by offering a set of tools, libraries, and best practices that streamline the development process.

These frameworks allow for the separation of concerns in web applications by enabling developers to create reusable components, manage state effectively, and handle events in a more efficient manner. This structure enhances maintainability, encourages code reuse, and improves collaboration among developers working on the same project.

In contrast, enhancing server performance, creating static websites, and optimizing database queries fall outside the primary scope of what JavaScript frameworks are intended to address. While these aspects are important in the overall development of a web application, they do not directly relate to the user interface and client-side functionality that frameworks like React and Angular aim to optimize.