The Internet of Things (IoT) has become an integral part of our present, with its growth showing no signs of slowing down. React.js is a popular JavaScript library used to develop IoT applications easily and efficiently. It offers several features such as compositional structure, lifecycle methods, and separation of concerns that make it a good choice for IoT projects. These features enable developers to create lean and small components, manage data in one place, and forward it to children's components when needed. React also uses props to pass on data to components, making the application flawless and updated with the latest data. However, React has some challenges such as lack of proper support, unpredictable behavior, and limited scalability for large IoT projects. Despite these challenges, its features like faster rendering process, compositional structure, and component-based structure make it a consideration for IoT applications.