Nano Stores
Tiny (334 bytes), framework-agnostic state management library for JavaScript. Provides atom (single value), computed (derived values), and map (key-value object) stores that work with React, Vue, Svelte, Angular, and vanilla JS. Designed as the minimal alternative to Redux, Zustand, or Pinia when you need shared state across framework components without bundle size overhead.
Score Breakdown
⚙ Agent Friendliness
🔒 Security
Minimal dependency footprint. No external calls. Client-side only.
⚡ Reliability
Best When
You need minimal, framework-agnostic state management with near-zero bundle impact — perfect for micro-frontends or libraries that need to share state across frameworks.
Avoid When
You need Redux DevTools, complex middleware, or framework-specific optimizations — Zustand or Jotai offer more ecosystem support.
Use Cases
- • Share state between React, Vue, and Svelte components in a multi-framework micro-frontend architecture
- • Manage global application state in any JavaScript project with near-zero bundle size impact
- • Create derived computed stores that automatically update when atom dependencies change
- • Implement lightweight pub/sub state sharing between agent UI components without framework-specific state solutions
- • Replace Redux or Zustand in small-to-medium apps where the feature set is sufficient and bundle size matters
Not For
- • Complex state with middleware, time-travel debugging, or Redux DevTools — Zustand or Redux Toolkit offer richer DevTools
- • Large applications requiring complex state normalization — Zustand or Jotai have better ecosystem for complex state
- • Teams needing framework-specific optimizations — Pinia is better for Vue-only, Jotai for React-only
Interface
Authentication
Client-side library. No authentication required.
Pricing
MIT license.
Agent Metadata
Known Gotchas
- ⚠ Framework bindings are separate packages — @nanostores/react, @nanostores/vue, @nanostores/solid must be installed separately from the core nanostores package
- ⚠ Stores are module-level singletons — in SSR contexts, stores may share state between requests unless reset per-request
- ⚠ Computed stores are lazy — they only compute when subscribed; first subscription triggers initial computation which may cause unexpected rendering
- ⚠ onMount and onStop lifecycle hooks run on first/last subscriber — not on initial store creation; initialization logic placement matters
- ⚠ Map stores (.setKey) do not trigger on same-value updates — deep equality is not checked; same value assignment skips subscribers
- ⚠ No built-in persistence — localStorage/sessionStorage integration requires manual setup or @nanostores/persistent package
Alternatives
Full Evaluation Report
Detailed scoring breakdown, competitive positioning, security analysis, and improvement recommendations for Nano Stores.
Scores are editorial opinions as of 2026-03-06.