During March 2025, Greenblues1190 focused on enhancing the TanStack/virtual repository by addressing a nuanced edge case in the Virtualizer’s total size calculation for scenarios where a single item spans multiple lanes. Using JavaScript and TypeScript, Greenblues1190 carefully adjusted loop conditions to prevent negative or zero indices, ensuring accurate and stable total size computation. The solution included the addition of targeted unit and integration tests to validate correct behavior in single-item multi-lane layouts. This work demonstrated a strong command of frontend development and testing, improving the reliability and user experience of multi-lane grid virtualization through precise debugging and code refinement.