• Utilized React's component-based architecture and virtual DOM to create a modular and reusable UI, promoting code maintainability and enabling efficient rendering and updating of the user interface.• Integrated React hooks to manage intra-component state, resulting in enhanced performance and smoother UX.• Employed Redux Toolkit to maintain and ensure consistent inter-component state, improving scalability & debugging.• Leveraged Puppeteer to serve a custom instance of Chrome, enabling cross-origin DOM and CSS retrieval via CDP.• Implemented custom functions to parse, store, and display the CSS styles of any clicked element.• Employed Node.js’ fs and regex modules to locate and modify CSS styles within the user’s repo source files.