Mariela Tihova worked on the IgniteUI/grid-demos-react repository, focusing on enhancing fullscreen user experience and modernizing dependencies. She implemented cross-browser fullscreen support, adding event listeners and resize handling to ensure consistent behavior across platforms. Her approach included refactoring fullscreen logic for clarity and applying targeted CSS and SCSS styles for both standard and WebKit fullscreen modes, resulting in a more polished and stable UI. Additionally, Mariela upgraded Ignite UI React packages to the latest versions, improving overall functionality and performance. Her work demonstrated solid proficiency in React, TypeScript, and UI design, delivering two features with attention to maintainability and usability.