To answer what is react js in the realm of web development, React JS technology emerges as a powerful force, revolutionizing the way user interfaces are built and experienced. Developed by Facebook, React JS stands as a JavaScript library that holds the key to crafting dynamic and engaging user interfaces. Its primary focus lies in providing a seamless way to create interactive components, ensuring a smoother and more responsive user experience. As we dive into the depths of React JS, we uncover its significance in modern development and how it serves as the bedrock for creating captivating digital interactions.