nanostores

Nano Stores

A tiny state manager for React, React Native, Preact, Vue, Svelte, Solid, Lit, Angular, and vanilla JS. It uses many atomic stores and direct manipulation.

• Small. Between 286 and 818 bytes (minified and brotlied). Zero dependencies. It uses Size Limit to control size.
• Fast. With small atomic and derived stores, you do not need to call the selector function for all components on every store change.
• Tree Shakable. A chunk contains only stores used by components in the chunk.
• Designed to move logic from components to stores.
• Good TypeScript support.

// store/users.ts
import { atom } from 'nanostores'

export const $users = atom<User[]>([])

export function addUser(user: User) {
  $users.set([...$users.get(), user]);
}

// store/admins.ts
import { computed } from 'nanostores'
import { $users } from './users.js'

export const $admins = computed($users, users => users.filter(i => i.isAdmin))

// components/admins.tsx
import { useStore } from '@nanostores/react'
import { $admins } from '../stores/admins.js'

export const Admins = () => {
  const admins = useStore($admins)
  return (
    <ul>
      {admins.map(user => <UserItem user={user} />)}
    </ul>
  )
}

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  Made in Evil Martians, product consulting for developer tools.

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Docs

Read full docs here.

Changelog

0.10.3

• Fixed incorrect previous value when listening deep store (by @euaaaio).