Worked on the ant-design/x repository to improve the reliability of React hooks, specifically addressing a crash in the useActive hook when provided with empty or invalid items arrays. Applied defensive programming techniques in TypeScript and JavaScript to guard the initialization of active paths, ensuring the hook handles edge cases gracefully. Added targeted regression tests to verify correct behavior and prevent future regressions, supporting a more stable experience for both developers and end users. This work enhanced the resilience of the codebase, demonstrated a test-driven approach, and contributed to the ongoing stability and maintainability of React-based features within the project.