This repository contains a minimal application set up to reproduce a suspected bug with MobX-State-Tree (MST) in a React Native application. The bug is described in detail below.
The app simulates a simple RootStore with a model AppStateStore within the RootStore. We will get access to the RootStore using a getRoot() function. The AppStateStore has an action that has to call an async RootStore action.
Using typescript, the RootStore typings become any the moment we call a RootStore action using yield. See ./rootStore.ts:12 for the line that causes the issue. Try commenting out that line, and uncommenting the next one ./rootStore.ts:13 and the typescript typings will work as expected, but without any way to stop the execution.
Also worth noting, the flow() wrapper does not inherit the typings from the function it wraps. See ./rootStore.ts:23
None, just open the ./rootStore file in VSCode and see the typescript typings for the rootStore variable.