Split a growing Zustand store into slices

My one Zustand store file is pushing a thousand lines and I've lost track of which action touches what.

IntermediateRead 9 minDoing: an afternoon7 steps

What you'll have at the end

One store file split into slice files that combine back into the same public store

Before you start

You need

A single store already shared by more than one screen, grown large enough to cover more than one clearly separate concern in the same file.

Not covered

Reaching for a namespacing helper library instead of the plain interface-and-spread pattern this recipe builds by hand.

Leans on

7 steps

A Zustand selector triggers extra renders

for a component that re-renders on a field it never reads, a narrower symptom than a single store file grown too large to organize

Checked 22 Aug 2026