Worked on the primer/react repository to address a critical issue in data table pagination, focusing on the accuracy of the displayed range when handling edge cases such as when the total count exceeds the page size by one. Applied expertise in React and TypeScript to fix the zero-based end index calculation, ensuring that paginated views now reflect the correct item range and reducing potential user confusion. Enhanced reliability by adding targeted unit and integration tests to cover these scenarios, while maintaining backward compatibility with the existing pagination API. Collaborated through code review and version control to deliver a more consistent user experience.