Building Web Apps That Keep Working Through Network Failures

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Reliable web applications should be judged by how they behave when connectivity drops mid-save, a mobile tab is suspended, or a server response is lost. Offline tolerance means preserving work and avoiding duplicate or misleading operations, not merely caching the interface so it can open without a network. The article recommends separating confirmed server state, optimistic local state, and pending mutations so the interface can always explain where a value came from. It also suggests mapping each key action to a capability level, such as offline-available, locally durable, or server-only, and recommends storing durable browser data in IndexedDB rather than component state or localStorage. The author draws on game development experience to argue that explicit state transitions are central to this kind of resilience.

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