The article provides a comprehensive guide on implementing a tooltip controller component in React, emphasizing its utility for creating cleaner and more interactive user interfaces. It explains the basic requirements for such a component, including seamless integration into JSX markup, maintaining visibility over all other elements, and ensuring interactivity when necessary. The author introduces the concept of compound components using two main components: `<Controller>` and `<Select>`, which manage the tooltip and the selected element, respectively. Key React APIs like React.Children, React.cloneElement, and ReactDOM.createPortal are used to handle children props, clone elements, and manage the DOM hierarchy effectively. The article also covers positioning the tooltip relative to a selected element, toggling its visibility, and preventing event bubbling to enhance user interaction. Through detailed code examples, it demonstrates how to create a dynamic and flexible tooltip system, offering insights into React's capabilities for building modular and maintainable components.