During April 2025, this developer enhanced the web-platform-tests/wpt repository by building comprehensive pointer drag tests for input type='range' elements. Focusing on both mouse and touch interactions, the work validated horizontal and vertical drag behaviors, ensuring accurate value updates and proper touch-action handling. Using HTML and JavaScript, the developer expanded test automation and cross-device coverage, porting existing assets to reinforce regression readiness and cross-browser consistency. The approach emphasized front end development and JavaScript testing, targeting improved reliability for drag interactions. No bugs were fixed during this period, as efforts centered on strengthening validation and early detection of potential regressions.