Worked on the mui/base-ui repository to enhance the accessibility and semantic correctness of the Select component’s trigger element. Focused on front end development using React and TypeScript, the developer refactored Select.Trigger to render as a button instead of a div, aligning with HTML standards and improving keyboard accessibility. This change addressed both WCAG compliance and maintainability by ensuring correct focus behavior and semantic structure. The implementation involved careful adjustment of the component’s base type and rendering logic, utilizing JSON for configuration where needed. The work contributed to more consistent, accessible UI components within the base-ui library, supporting best practices.