Fix and explain flaws in vanilla JS code, then justify changes to CTO. Simulation Details: Tradewell is a mid-sized e-commerce company generating $5 million in monthly revenue, with its checkout process responsible for over 70% of sales. As mobile traffic has surged, the legacy JavaScript powering the checkout has become a bottleneck, causing slow load times and increased cart abandonment—especially during peak periods. Competitors have gained ground by offering faster, more adaptive mobile checkouts. To maintain its edge, Tradewell is prioritizing a modernization of its checkout flow, aiming to cut load times and ensure compatibility with both modern and older browsers. Leadership is committed to balancing cutting-edge improvements with the need to support legacy environments, making this refactor critical to Tradewell’s continued growth and reputation. You take on the role of Tradewell’s Front-End Developer, tasked with refactoring the legacy JavaScript file that drives the company’s checkout process. Your mission is to identify and address code issues—such as deeply nested callbacks, global variables, and inefficient loops—while updating the code to modern ES6+ standards and maintaining backward compatibility for older browsers. You’ll collaborate one-on-one with the Senior JavaScript Developer, who reviews your changes, challenges your decisions, and provides feedback on clarity, best practices, and edge case handling. Once your refactor is complete, you’ll communicate directly with the CTO, providing a concise, high-level summary of the original code’s weaknesses and explaining how your improvements enhance performance, maintainability, and business reliability. Your ability to justify technical decisions and reassure leadership about risk mitigation and launch readiness will be key to success. - Review and refactor the legacy JavaScript checkout file in the simulation editor, addressing major code issues while preserving functionality and compatibility. - Discuss your approach and code changes with the Senior JavaScript Developer, responding to feedback and refining your solution. - Provide the CTO with a clear, business-focused explanation of the improvements and how they support Tradewell’s goals. - Demonstrate strong skills in code refactoring, JavaScript expertise, and technical communication to complete the simulation.