In May 2025, Yong Kim developed a new Popover API feature for the facebook/react repository, focusing on enhancing the visibility of TraceUpdates highlights in React DevTools. By leveraging JavaScript, React, and front end development skills, Yong ensured that update highlights consistently appear above all content, including dialogs and other top-layer elements. The implementation maintained backward compatibility for browsers lacking Popover API support, prioritizing a seamless developer experience with minimal runtime overhead. Although no bugs were fixed during this period, Yong concentrated on user experience polish and cross-browser reliability, demonstrating a thoughtful approach to both technical depth and usability.