Link to project: https://elaborate-horse-df22ad.netlify.app
Tech used: HTML, CSS, JavaScript, React, Paypal API
This project uses React, add to the cart the amout of items that you want to buy, complete the form and pay the merch with Paypal, to test the payment you can create a fake account.
Could be responsive and form validations can be added
More understanding of React and how to use the Paypal API
Take a look at these couple examples that I have in my own portfolio:
PlatziPunks-Backend: https://github.com/Jsebas1198/PlatziPunks-Backend-SmartContracts-WEB3
PlatziPunks-Frontend: https://github.com/Jsebas1198/PlatziPunks-Frontend-WEB3
Wave-Portal-Interface: https://github.com/Jsebas1198/Wave-Portal-Interface-WEB3