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How Text Survives a Tunnel: Offline Queueing Deep Dive
Ever tapped send on a form just as your train entered a tunnel, and the message arrived perfectly on the other side? This episode unpacks the surprisingly intricate chain of events that makes that work for small text payloads. We trace the journey from a failed fetch through IndexedDB storage, service worker background sync, and Stripe-style idempotency keys on the backend. Along the way, we expose the traps: why navigator.onLine lies, the browser support gap for Background Sync, and the five failure modes that turn a simple queue into a debugging nightmare. If you've ever wondered where the…
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