Worked on enhancing the checkout confirmation flow in the stripe/stripe-js repository by introducing the onRequiresApproval parameter, enabling asynchronous approval handling during transaction confirmation. Focused on refining the confirmation logic to support scenarios where approval is required before proceeding, which improved the flexibility of API integration for downstream merchants. Utilized JavaScript and TypeScript to implement these changes, emphasizing front end development and robust API design. The work reduced manual friction in the checkout process and laid the foundation for more seamless integration of approval gating. No critical bugs were reported during this period, allowing for concentrated effort on feature delivery.