Files
agent-skills/skills/pinia/references/features-composables.md
Jason Woltje f5792c40be feat: Complete fleet — 94 skills across 10+ domains
Pulled ALL skills from 15 source repositories:
- anthropics/skills: 16 (docs, design, MCP, testing)
- obra/superpowers: 14 (TDD, debugging, agents, planning)
- coreyhaines31/marketingskills: 25 (marketing, CRO, SEO, growth)
- better-auth/skills: 5 (auth patterns)
- vercel-labs/agent-skills: 5 (React, design, Vercel)
- antfu/skills: 16 (Vue, Vite, Vitest, pnpm, Turborepo)
- Plus 13 individual skills from various repos

Mosaic Stack is not limited to coding — the Orchestrator and
subagents serve coding, business, design, marketing, writing,
logistics, analysis, and more.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
2026-02-16 16:27:42 -06:00

115 lines
2.7 KiB
Markdown

---
name: composables-in-stores
description: Using Vue composables within Pinia stores
---
# Composables in Stores
Pinia stores can leverage Vue composables for reusable stateful logic.
## Option Stores
Call composables inside the `state` property, but only those returning writable refs:
```ts
import { defineStore } from 'pinia'
import { useLocalStorage } from '@vueuse/core'
export const useAuthStore = defineStore('auth', {
state: () => ({
user: useLocalStorage('pinia/auth/login', 'bob'),
}),
})
```
**Works:** Composables returning `ref()`:
- `useLocalStorage`
- `useAsyncState`
**Doesn't work in Option Stores:**
- Composables exposing functions
- Composables exposing readonly data
## Setup Stores
More flexible - can use almost any composable:
```ts
import { defineStore } from 'pinia'
import { useMediaControls } from '@vueuse/core'
import { ref } from 'vue'
export const useVideoPlayer = defineStore('video', () => {
const videoElement = ref<HTMLVideoElement>()
const src = ref('/data/video.mp4')
const { playing, volume, currentTime, togglePictureInPicture } =
useMediaControls(videoElement, { src })
function loadVideo(element: HTMLVideoElement, newSrc: string) {
videoElement.value = element
src.value = newSrc
}
return {
src,
playing,
volume,
currentTime,
loadVideo,
togglePictureInPicture,
}
})
```
**Note:** Don't return non-serializable DOM refs like `videoElement` - they're internal implementation details.
## SSR Considerations
### Option Stores with hydrate()
Define a `hydrate()` function to handle client-side hydration:
```ts
import { defineStore } from 'pinia'
import { useLocalStorage } from '@vueuse/core'
export const useAuthStore = defineStore('auth', {
state: () => ({
user: useLocalStorage('pinia/auth/login', 'bob'),
}),
hydrate(state, initialState) {
// Ignore server state, read from browser
state.user = useLocalStorage('pinia/auth/login', 'bob')
},
})
```
### Setup Stores with skipHydrate()
Mark state that shouldn't hydrate from server:
```ts
import { defineStore, skipHydrate } from 'pinia'
import { useEyeDropper, useLocalStorage } from '@vueuse/core'
export const useColorStore = defineStore('colors', () => {
const { isSupported, open, sRGBHex } = useEyeDropper()
const lastColor = useLocalStorage('lastColor', sRGBHex)
return {
// Skip hydration for client-only state
lastColor: skipHydrate(lastColor),
open, // Function - no hydration needed
isSupported, // Boolean - not reactive
}
})
```
`skipHydrate()` only applies to state properties (refs), not functions or non-reactive values.
<!--
Source references:
- https://pinia.vuejs.org/cookbook/composables.html
-->