Worked on the pretix/pretix repository to refactor the widget’s mobile detection logic, focusing on simplifying and stabilizing its behavior across devices. The approach involved adopting ResizeObserver as the sole method for mobile detection, removing legacy fallback logic and outdated browser branches. This update reduced code complexity and technical debt, resulting in a more maintainable and predictable user interface. By consolidating the detection logic, the widget now aligns better with modern browser capabilities and supports faster future iterations. The work was implemented using Vue.js and JavaScript, emphasizing front end development best practices and improving consistency across supported environments.