Channel surfing for Expo Updates: How to switch update channels at runtime
Blog post from Expo
Channel surfing in app development allows developers to dynamically switch update channels within an installed app without requiring a new build installation, enabling targeted updates and quick feedback loops. This approach is facilitated by EAS Update and involves setting a channel header through a simple API call, which determines the update stream an app will follow until an override or uninstall occurs. By allowing an app to shift between channels like production and preview, developers can test changes with specific users, such as QA or non-technical stakeholders, without distributing updates to the entire user base. This process, which requires configuring projects with EAS Update and implementing a channel switcher UI, provides flexibility in testing and feedback, enhancing iteration speed by letting updates be reviewed in a production environment before broad deployment. However, developers must consider potential risks, such as runtime version mismatches or data incompatibilities when switching channels, and ensure updates are safe to toggle between or restrict channel changes accordingly.
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