Worked on the vega/vega-lite repository to address an accessibility issue affecting data visualizations. Focused on improving ARIA attribute handling for the Voronoi layer, the developer implemented a targeted fix that disables ARIA attributes when the nearest property is set to true. This change prevented the addition of inaccessible, description-less ARIA attributes, resolving related accessibility test failures and enhancing the end-user experience for screen readers. The solution was developed using JavaScript and TypeScript within the Vega-Lite codebase, leveraging accessibility (a11y) best practices, ARIA patterns, and continuous integration testing to ensure robust and compliant front-end functionality.