Worked on stabilizing scroll-based interactions in the NervJS/taro repository by addressing a core reliability issue in the VirtualWaterfall component. Focused on ensuring that onScrollToLower and onScrollToUpper events trigger correctly, regardless of renderTop or renderBottom configurations, which improved the consistency of infinite scrolling in production applications. The solution involved targeted changes to event handling logic and careful documentation to align with existing render configuration APIs. Utilized JavaScript, TypeScript, and React to deliver a clean, maintainable bug fix that reduced edge-case failures in virtualized list rendering, enhancing the user experience for applications relying on large, scrollable data sets.