Server Cache React

---
name: server-cache-react
description: Per-Request Deduplication with React.cache(). Use when you need help with server cache react.
license: CC-BY-NC-SA-4.0
metadata:
  risk: unknown
  source: community
  kind: mode
  category: rules
---

## Per-Request Deduplication with React.cache()

Use `React.cache()` for server-side request deduplication. Authentication and database queries benefit most.

**Usage:**

```typescript
import { cache } from "react";

export const getCurrentUser = cache(async () => {
  const session = await auth();
  if (!session?.user?.id) return null;
  return await db.user.findUnique({
    where: { id: session.user.id },
  });
});
```

Within a single request, multiple calls to `getCurrentUser()` execute the query only once.