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Architecture note for using EAS Update to deliver JavaScript and assets over the air in managed Expo apps, covering requirements, minimal design, trust boundaries, operational checks, failure modes and when to change the design.
Expo's OTA update feature lets you ship JavaScript fixes directly to devices, bypassing store review. This guide covers setup, a worked example, and key limitations.
Expo Updates OTA Fallback with Hermes The Expo SDK provides over‑the‑air JavaScript bundle updates via expo-updates . When an OTA update cannot be applied—such as a 404 response—the SDK falls back to the locally bundled JavaScript. The behavior of the cached failed bundle, especially in the presence of Hermes’ own caching mechanism, is not clearly documented
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