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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>
105 lines
3.1 KiB
Markdown
105 lines
3.1 KiB
Markdown
---
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category: '@Firebase'
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---
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# useFirestore
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Reactive [Firestore](https://firebase.google.com/docs/firestore) binding. Making it straightforward to **always keep your local data in sync** with remotes databases.
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## Usage
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```ts {9,12,17,22}
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import { useFirestore } from '@vueuse/firebase/useFirestore'
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import { initializeApp } from 'firebase/app'
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import { collection, doc, getFirestore, limit, orderBy, query } from 'firebase/firestore'
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import { computed, shallowRef } from 'vue'
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const app = initializeApp({ projectId: 'MY PROJECT ID' })
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const db = getFirestore(app)
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const todos = useFirestore(collection(db, 'todos'))
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// or for doc reference
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const user = useFirestore(doc(db, 'users', 'my-user-id'))
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// you can also use ref value for reactive query
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const postsLimit = shallowRef(10)
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const postsQuery = computed(() => query(collection(db, 'posts'), orderBy('createdAt', 'desc'), limit(postsLimit.value)))
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const posts = useFirestore(postsQuery)
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// you can use the boolean value to tell a query when it is ready to run
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// when it gets falsy value, return the initial value
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const userId = shallowRef('')
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const userQuery = computed(() => userId.value && doc(db, 'users', userId.value))
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const userData = useFirestore(userQuery, null)
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```
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## Share across instances
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You can reuse the db reference by passing `autoDispose: false`. You can also set an amount of milliseconds before auto disposing the db reference.
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Note : Getting a not disposed db reference again don't cost a Firestore read.
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```ts
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import { useFirestore } from '@vueuse/firebase/useFirestore'
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import { collection } from 'firebase/firestore'
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// ---cut---
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const todos = useFirestore(collection(db, 'todos'), undefined, { autoDispose: false })
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```
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or use `createGlobalState` from the core package
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```ts twoslash include store
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// @filename: store.ts
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// ---cut---
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// store.ts
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import { createGlobalState } from '@vueuse/core'
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import { useFirestore } from '@vueuse/firebase/useFirestore'
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export const useTodos = createGlobalState(
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() => useFirestore(collection(db, 'todos')),
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)
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```
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```vue
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<!-- app.vue -->
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<script setup lang="ts">
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// @include: store
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// ---cut---
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import { useTodos } from './store'
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const todos = useTodos()
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</script>
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```
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## Type Declarations
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```ts
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export interface UseFirestoreOptions {
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errorHandler?: (err: Error) => void
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autoDispose?: boolean | number
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}
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export type FirebaseDocRef<T> = Query<T> | DocumentReference<T>
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type Falsy = false | 0 | "" | null | undefined
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export declare function useFirestore<T extends DocumentData>(
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maybeDocRef: MaybeRef<DocumentReference<T> | Falsy>,
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initialValue: T,
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options?: UseFirestoreOptions,
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): Ref<T | null>
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export declare function useFirestore<T extends DocumentData>(
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maybeDocRef: MaybeRef<Query<T> | Falsy>,
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initialValue: T[],
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options?: UseFirestoreOptions,
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): Ref<T[]>
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export declare function useFirestore<T extends DocumentData>(
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maybeDocRef: MaybeRef<DocumentReference<T> | Falsy>,
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initialValue?: T | undefined | null,
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options?: UseFirestoreOptions,
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): Ref<T | undefined | null>
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export declare function useFirestore<T extends DocumentData>(
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maybeDocRef: MaybeRef<Query<T> | Falsy>,
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initialValue?: T[],
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options?: UseFirestoreOptions,
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): Ref<T[] | undefined>
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```
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