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oranguru/llm/docs/zustandsyncstore.md
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# @warkypublic/zustandsyncstore v1.0.0
React library providing synchronized Zustand stores with prop-based state management and persistence support.
## Peer Dependencies
- `react` >= 19.0.0
- `zustand` >= 5.0.0
- `use-sync-external-store` >= 1.4.0
## Runtime Dependencies
- `@warkypublic/artemis-kit`
## API
Single export: `createSyncStore`
```typescript
import { createSyncStore } from '@warkypublic/zustandsyncstore';
```
### createSyncStore<TState, TProps>(createState?, useValue?)
**Parameters:**
- `createState` (optional): Zustand `StateCreator<TState>` function
- `useValue` (optional): Custom hook receiving `{ useStore, useStoreApi } & TProps`, returns additional state to merge
**Returns:** `SyncStoreReturn<TState, TProps>` containing:
- `Provider` — React context provider component
- `useStore` — Hook to access the store
### Provider Props
| Prop | Type | Description |
|---|---|---|
| `children` | `ReactNode` | Required |
| `firstSyncProps` | `string[]` | Props to sync only on first render |
| `persist` | `PersistOptions<Partial<TProps & TState>>` | Zustand persist config |
| `waitForSync` | `boolean` | Wait for sync before rendering children |
| `fallback` | `ReactNode` | Shown while waiting for sync |
| `...TProps` | `TProps` | Custom props synced to store state |
### useStore Hook
```typescript
const state = useStore(); // entire state (TState & TProps)
const count = useStore(state => state.count); // with selector
const count = useStore(state => state.count, (a, b) => a === b); // with equality fn
```
## Usage
### Basic
```tsx
interface MyState { count: number; increment: () => void; }
interface MyProps { initialCount: number; }
const { Provider, useStore } = createSyncStore<MyState, MyProps>(
(set) => ({
count: 0,
increment: () => set((state) => ({ count: state.count + 1 })),
})
);
function Counter() {
const { count, increment } = useStore();
return <button onClick={increment}>Count: {count}</button>;
}
function App() {
return (
<Provider initialCount={10}>
<Counter />
</Provider>
);
}
```
### With Custom Hook Logic
```tsx
const { Provider, useStore } = createSyncStore<MyState, MyProps>(
(set) => ({ count: 0, increment: () => set((s) => ({ count: s.count + 1 })) }),
({ useStore, useStoreApi, initialCount }) => {
const currentCount = useStore(state => state.count);
return { computedValue: initialCount * 2 };
}
);
```
### With Persistence
```tsx
<Provider initialCount={10} persist={{ name: 'my-store', storage: localStorage }}>
<Counter />
</Provider>
```
### Selective Prop Syncing
```tsx
<Provider initialCount={10} otherProp="value" firstSyncProps={['initialCount']}>
<Counter />
</Provider>
```
## Internal Types
```typescript
type LocalUseStore<TState, TProps> = TState & TProps;
// Store state includes a $sync method for internal prop syncing
type InternalStoreState<TState, TProps> = TState & TProps & {
$sync: (props: TProps) => void;
};
type SyncStoreReturn<TState, TProps> = {
Provider: (props: { children: ReactNode } & {
firstSyncProps?: string[];
persist?: PersistOptions<Partial<TProps & TState>>;
waitForSync?: boolean;
fallback?: ReactNode;
} & TProps) => React.ReactNode;
useStore: {
(): LocalUseStore<TState, TProps>;
<U>(selector: (state: LocalUseStore<TState, TProps>) => U, equalityFn?: (a: U, b: U) => boolean): U;
};
};
```