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I'm happily using Phoenix+LiveView for a website that works as a PWA. This also includes offline mode with sync-when-internet-is-available functionality (thanks PouchDB!). This covers online/offline/mobile usecases, with no explicit RPC, and no requirements for the end device that the app would run on, other than a _capable_ browser.

(Admittedly, browsers on iOS are gimped, but that's part of the Apple tax).

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I don’t understand. How is the app working in offline mode when the Phoenix server is not reachable, since the interactions are managed server-side with LiveView?

Sorry, my statement indeed got confusing. I'm using LiveView for online interactions. I'm using PouchDB + JS for data synchronization and enabling offline work. You are right that LiveView itself does need to be online, since it's whole point is to move (back) the UI logic to the server side.

Thanks for clarifying!

what is gimped about iOS browsers?

WebPush is the feature that I'm missing. See https://developer.apple.com/forums/thread/114503

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