How to Build a Desync-Free Next.js Shop Inside Telegram Mini Apps

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Developers building e-commerce experiences inside Telegram Mini Apps using Next.js frequently encounter state desynchronization, iOS viewport bugs, and client-side security vulnerabilities. The core issue arises when React state updates are not properly synced with Telegram's native MainButton, a global SDK element, causing stale cart data or duplicate transactions. A secure checkout flow requires routing invoice generation through a Next.js Route Handler that validates Telegram's initData server-side, preventing bot token exposure. iOS WebView also mishandles viewport height when the keyboard appears or the MainButton toggles, pushing UI elements off-screen. A React Context Provider wrapping the Telegram WebApp SDK helps manage SSR compatibility and ensures the SDK is safely initialized only on the client side.

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ProgrammingDEV Community ·

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ProgrammingDEV Community ·

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