Worked on accessibility enhancements for the dropdown component in the zendesk/copenhagen_theme repository, focusing on improving usability for keyboard and screen-reader users. Implemented ARIA attributes such as aria-expanded and aria-haspopup using HTML and JavaScript, ensuring accurate state management and initialization within the Dropdown class. Updated template files and expanded automated tests to validate dynamic ARIA behavior during user interaction. Addressed inconsistencies by guaranteeing required attributes were present and maintained throughout component updates. Rebuilt the project’s script.js to incorporate these changes, supporting reliable deployments. This work reduced accessibility defects and strengthened the overall front end reliability for Copenhagen Theme users.