Duplicate atom key when using Webpack Module Federation

We’re currently investigating how we could fully use the advantages Webpack’s Module Federation can offer.

However, when exposing an atom from one module to another, we get the Duplicate atom key warning.

Is this something that we should be worried about? Is there something we can do?

[andreawyss]

I was able to resolve the issue by having a single common federated bundle containing the app providers with the RecoilRoot and the atoms that need to be shared across federated bundles. All other federated bundles have this common federated bundle as a Remote dependency.

[liuyisnake]

met the same issue and i use snapshot_UNSTABLE() to avoid redefine

const snap = snapshot_UNSTABLE(); const current = Array.from(snap.getNodes_UNSTABLE()); function singletonAtom<T> (options: AtomOptions<T>) { const previous:RecoilState<T> = current.find((item) => item.key === options.key) as RecoilState<T>; return previous ?? atom(options); }