ניהול מדינה באסטרו: צלילה עמוקה לננו-סטורס

import { atom, map, computed } from 'nanostores'

// Atom
const count = atom(0)

// Map
const user = map({ name: 'Astro Fan', isLoggedIn: false })

// Computed Store
const greeting = computed([user], (user) => 
  user.isLoggedIn ? `Welcome back, ${user.name}!` : 'Hello, guest!'
)

# Using npm
npm install nanostores
npm install @nanostores/react  # For React
npm install @nanostores/vue    # For Vue

# Using yarn
yarn add nanostores
yarn add @nanostores/react     # For React
yarn add @nanostores/vue       # For Vue

# Using pnpm
pnpm add nanostores
pnpm add @nanostores/react     # For React
pnpm add @nanostores/vue       # For Vue

# Note: Svelte doesn't require a separate integration

import { atom } from 'nanostores'

export const count = atom(0)

export function increment() {
  count.set(count.get() + 1)
}

export function decrement() {
  count.set(count.get() - 1)
}

---
import { count, increment, decrement } from '../stores/counterStore'
---

<div>
  <button onclick={decrement}>-</button>
  <span>{count.get()}</span>
  <button onclick={increment}>+</button>
</div>

<script>
  import { count } from '../stores/counterStore'

  count.subscribe(value => {
    document.querySelector('span').textContent = value
  })
</script>

// src/stores/independentCounterStore.js
import { atom } from 'nanostores'

export const reactCount = atom(0)
export const vueCount = atom(0)
export const svelteCount = atom(0)
export const astroCount = atom(0)

export function increment(store) {
  store.set(store.get() + 1)
}

export function decrement(store) {
  store.set(store.get() - 1)
}

// src/components/ReactCounter.jsx
import { useStore } from '@nanostores/react'
import { reactCount, increment, decrement } from '../stores/independentCounterStore'

export function ReactCounter() {
  const count = useStore(reactCount)

  return (
    <div>
      <button onClick={() => decrement(reactCount)}>-</button>
      <span>{count}</span>
      <button onClick={() => increment(reactCount)}>+</button>
    </div>
  )
}

<!-- src/components/VueCounter.vue -->
<template>
  <div>
    <button @click="decrement(vueCount)">-</button>
    <span>{{ count }}</span>
    <button @click="increment(vueCount)">+</button>
  </div>
</template>

<script setup>
import { useStore } from '@nanostores/vue'
import { vueCount, increment, decrement } from '../stores/independentCounterStore'

const count = useStore(vueCount)
</script>

<!-- src/components/SvelteCounter.svelte -->
<script>
import { svelteCount, increment, decrement } from '../stores/independentCounterStore'
</script>

<div>
  <button on:click={() => decrement(svelteCount)}>-</button>
  <span>{$svelteCount}</span>
  <button on:click={() => increment(svelteCount)}>+</button>
</div>

---
import { astroCount, increment, decrement } from '../stores/independentCounterStore'
---

<div>
  <button id="decrement">-</button>
  <span id="count">{astroCount.get()}</span>
  <button id="increment">+</button>
</div>

<script>
  import { astroCount, increment, decrement } from '../stores/independentCounterStore'

  document.getElementById('decrement').addEventListener('click', () => decrement(astroCount))
  document.getElementById('increment').addEventListener('click', () => increment(astroCount))

  astroCount.subscribe(value => {
    document.getElementById('count').textContent = value
  })
</script>

// src/stores/sharedCounterStore.js
import { atom } from 'nanostores'

export const sharedCount = atom(0)

export function increment() {
  sharedCount.set(sharedCount.get() + 1)
}

export function decrement() {
  sharedCount.set(sharedCount.get() - 1)
}

// src/components/ReactSharedCounter.jsx
import { useStore } from '@nanostores/react'
import { sharedCount, increment, decrement } from '../stores/sharedCounterStore'

export function ReactSharedCounter() {
  const count = useStore(sharedCount)

  return (
    <div>
      <h2>React Shared Counter</h2>
      <button onClick={decrement}>-</button>
      <span>{count}</span>
      <button onClick={increment}>+</button>
    </div>
  )
}

<!-- src/components/VueSharedCounter.vue -->
<template>
  <div>
    <h2>Vue Shared Counter</h2>
    <button @click="decrement">-</button>
    <span>{{ count }}</span>
    <button @click="increment">+</button>
  </div>
</template>

<script setup>
import { useStore } from '@nanostores/vue'
import { sharedCount, increment, decrement } from '../stores/sharedCounterStore'

const count = useStore(sharedCount)
</script>

<!-- src/components/SvelteSharedCounter.svelte -->
<script>
import { sharedCount, increment, decrement } from '../stores/sharedCounterStore'
</script>

<div>
  <h2>Svelte Shared Counter</h2>
  <button on:click={decrement}>-</button>
  <span>{$sharedCount}</span>
  <button on:click={increment}>+</button>
</div>

---
import { sharedCount, increment, decrement } from '../stores/sharedCounterStore'
---

<div>
  <h2>Astro Shared Counter</h2>
  <button id="shared-decrement">-</button>
  <span id="shared-count">{sharedCount.get()}</span>
  <button id="shared-increment">+</button>
</div>

<script>
  import { sharedCount, increment, decrement } from '../stores/sharedCounterStore'

  document.getElementById('shared-decrement').addEventListener('click', decrement)
  document.getElementById('shared-increment').addEventListener('click', increment)

  sharedCount.subscribe(value => {
    document.getElementById('shared-count').textContent = value
  })
</script>

# Using npm
npm install @nanostores/persistent

# Using yarn
yarn add @nanostores/persistent

# Using pnpm
pnpm add @nanostores/persistent

// src/stores/persistentCounterStore.js
import { persistentAtom } from '@nanostores/persistent'

export const persistentCount = persistentAtom('persistentCount', 0)

export function increment() {
  persistentCount.set(persistentCount.get() + 1)
}

export function decrement() {
  persistentCount.set(persistentCount.get() - 1)
}

export function reset() {
  persistentCount.set(0)
}

// src/components/ReactPersistentIncrement.jsx
import { useStore } from '@nanostores/react'
import { persistentCount, increment } from '../stores/persistentCounterStore'

export function ReactPersistentIncrement() {
  const count = useStore(persistentCount)

  return (
    <button onClick={increment}>
      React Increment: {count}
    </button>
  )
}

<!-- src/components/VuePersistentDecrement.vue -->
<template>
  <button @click="decrement">
    Vue Decrement: {{ count }}
  </button>
</template>

<script setup>
import { useStore } from '@nanostores/vue'
import { persistentCount, decrement } from '../stores/persistentCounterStore'

const count = useStore(persistentCount)
</script>

<!-- src/components/SveltePersistentDisplay.svelte -->
<script>
import { persistentCount } from '../stores/persistentCounterStore'
</script>

<div>
  Svelte Display: {$persistentCount}
</div>

---
import { reset } from '../stores/persistentCounterStore'
---

<button id="reset-button">Astro Reset</button>

<script>
  import { persistentCount, reset } from '../stores/persistentCounterStore'

  document.getElementById('reset-button').addEventListener('click', reset)

  persistentCount.subscribe(value => {
    console.log('Persistent count updated:', value)
  })
</script>

---
import ReactPersistentIncrement from '../components/ReactPersistentIncrement'
import VuePersistentDecrement from '../components/VuePersistentDecrement.vue'
import SveltePersistentDisplay from '../components/SveltePersistentDisplay.svelte'
---

<div>
  <h2>Persistent Counter Across Frameworks</h2>
  <ReactPersistentIncrement client:load />
  <VuePersistentDecrement client:load />
  <SveltePersistentDisplay client:load />
  <button id="reset-button">Astro Reset</button>
</div>

<script>
  import { persistentCount, reset } from '../stores/persistentCounterStore'

  document.getElementById('reset-button').addEventListener('click', reset)

  persistentCount.subscribe(value => {
    console.log('Persistent count updated:', value)
  })
</script>

// Prefer this:
const userProfile = map({ name: '', email: '' })
const userPreferences = map({ theme: 'light', language: 'en' })

// Over this:
const user = map({ name: '', email: '', theme: 'light', language: 'en' })

import { atom, computed } from 'nanostores'

const firstName = atom('John')
const lastName = atom('Doe')

const fullName = computed(
  [firstName, lastName],
  (first, last) => `${first} ${last}`
)

import { atom } from 'nanostores'

interface User {
  id: number
  name: string
}

const currentUser = atom<User | null>(null)

import { atom, batched } from 'nanostores'

const count1 = atom(0)
const count2 = atom(0)

export const incrementBoth = batched(() => {
  count1.set(count1.get() + 1)
  count2.set(count2.get() + 1)
})

// stores/themeStore.js
import { atom } from 'nanostores'

export const theme = atom('light')

export function toggleTheme() {
  theme.set(theme.get() === 'light' ? 'dark' : 'light')
}

// React component
import { useStore } from '@nanostores/react'
import { theme, toggleTheme } from '../stores/themeStore'

function ThemeToggle() {
  const currentTheme = useStore(theme)
  return <button onClick={toggleTheme}>{currentTheme}</button>
}

import { atom, onMount } from 'nanostores'

const count = atom(0)

if (import.meta.env.DEV) {
  onMount(count, () => {
    count.listen((value) => {
      console.log('Count changed:', value)
    })
  })
}

import { useEffect } from 'react'
import { count } from '../stores/countStore'

function Counter() {
  useEffect(() => {
    const unsubscribe = count.subscribe(() => {
      // Do something
    })
    return unsubscribe
  }, [])

  // Rest of the component
}