A custom hook that uses useRef to maintain stable references to values and functions, preventing stale closures in effects and callbacks. This isolated utility solves a common React problem with minimal code and could be extracted to any React project.

A hook for creating and managing DOM portals with proper cleanup and error handling. It encapsulates the complexity of portal lifecycle management, making it easy to render content outside the normal DOM flow while ensuring resources are cleaned up correctly.

A component that traps focus within its children, essential for accessible modal dialogs. It handles edge cases like focusing the first/last element and restoring focus when unmounted, demonstrating expertise in accessibility implementation.

A hook that detects clicks outside of a specified element, commonly used for implementing dropdowns, menus, and popovers. It properly manages event listeners with cleanup and provides a reliable way to handle external interactions.