Worked on the Leaflet/Leaflet repository to deliver an internal refactor and targeted performance improvements for the TileLayer component. The approach centered on enhancing modularity by removing dependencies on the global L object, instead favoring direct class references to improve code maintainability and testability. Additionally, optimized TileLayer image source handling by replacing data URIs with empty strings, which reduced memory usage and improved rendering performance. This JavaScript-based work focused on front end and library development, laying a foundation for easier future enhancements and clearer module boundaries while addressing both code health and performance within the project’s primary codebase.