During January 2025, this developer enhanced the primer/react repository by implementing an onDismiss feature for the critical variant of the Banner component. The work focused on improving user experience for critical alerts, allowing users to dismiss banners as needed. Using React with both JavaScript and TypeScript, the developer updated and expanded test coverage to ensure that dismiss behavior was accurately reflected across all banner variants, thereby strengthening regression safety. No major bugs were addressed during this period, but the contribution resulted in a more robust and user-friendly UI component, demonstrating attention to both functionality and maintainability in front-end development.