Accept E-Commerce Payments Easily with PayPal’s Buttons Component

This guide demonstrates how to integrate PayPal's Standard Checkout Payment Buttons component into an e-commerce app using HTML and Node.js.

• •Requires PayPal REST API credentials (Client ID and Secret) from the Developer Dashboard, with sandbox mode enabled for development
• •Basic integration involves three files: server.js for the backend server, app.js for client-side logic, and checkout.html for the UI
• •For security, transaction amounts are never passed from the frontend; only product SKU/ID and quantity are sent, with totals calculated server-side
• •Custom integration adds a product catalog styled with TailwindCSS, demonstrating a full shopping cart and checkout flow
• •The PayPal JS SDK is loaded via a script tag in checkout.html with the Client ID embedded in the URL