Tarwin developed cross-compatibility for the Map drawing UI between Mapbox GL and MapLibre within the maplibre/maplibre-gl-js repository. By updating CSS classes in the Mapbox draw example, Tarwin addressed mismatches that previously caused interaction issues with drawing tools in MapLibre-enabled environments. This work, using CSS, HTML, and JavaScript, improved interoperability and reduced the need for manual user workarounds. Tarwin documented the compatibility approach to support ongoing maintenance as MapLibre and Mapbox evolve. The contribution focused on a single feature over one month, demonstrating targeted problem-solving and a clear understanding of front end development challenges in open-source mapping libraries.