Why is React JS popular?

React is a popular JavaScript library for building user interfaces and web applications. It is widely used by developers and companies worldwide because it provides a powerful and flexible way to create interactive and dynamic user interfaces.

Some of the reasons why React is so popular include:

• It is highly efficient and fast. React uses a virtual DOM (Document Object Model) to efficiently update and render components, which makes it much faster than other UI libraries that manipulate the actual DOM.
• It is declarative. React uses a declarative approach to programming, which means that developers specify what they want the UI to look like, and React takes care of the rest. This makes it easier to reason about and understand the code, and it also makes it easier to debug and maintain.
• It is flexible and modular. React is built around the concept of components, which are self-contained units of UI that can be composed and reused in different parts of the application. This makes it easy to create and maintain large, complex UI applications.
• It has a large and active community. React has a large and active community of developers and companies who contribute to the project, share their knowledge and expertise, and create third-party libraries and tools that extend React's capabilities. This makes it easier for developers to learn and use React, and it also helps to ensure that the project continues to evolve and improve.

Overall, React is popular because it provides a powerful and flexible way to create dynamic and interactive user interfaces. It has a large and active community of developers and companies who support and contribute to the project.