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useFirestore

Category @Firebase
Export Size 631 B
Package @vueuse/firebase
Last Changed 2 weeks ago

Reactive Firestore binding. Making it straightforward to always keep your local data in sync with remotes databases. Available in the @vueuse/firebase add-on.

Usage 

import { computed, ref } from 'vue'
import { initializeApp } from 'firebase/app'
import { collection, doc, getFirestore, limit, orderBy, query } from 'firebase/firestore'
import { useFirestore } from '@vueuse/firebase/useFirestore'

const app = initializeApp({ projectId: 'MY PROJECT ID' })
const db = getFirestore(app)

const todos = useFirestore(collection(db, 'todos'))

// or for doc reference
const user = useFirestore(doc(db, 'users', 'my-user-id'))

// you can also use ref value for reactive query
const postsLimit = ref(10)
const postsQuery = computed(() => query(collection(db, 'posts'), orderBy('createdAt', 'desc'), limit(postsLimit.value)))
const posts = useFirestore(postsQuery)

// you can use the boolean value to tell a query when it is ready to run
// when it gets falsy value, return the initial value
const userId = ref('')
const userQuery = computed(() => userId.value && doc(db, 'users', userId.value))
const userData = useFirestore(userQuery, null)

Share across instances

You can reuse the db reference by passing autoDispose: false. You can also set an amount of milliseconds before auto disposing the db reference.

Note : Getting a not disposed db reference again don't cost a Firestore read.

const todos = useFirestore(collection(db, 'todos'), undefined, { autoDispose: false })

or use createGlobalState from the core package

// store.js
import { createGlobalState } from '@vueuse/core'
import { useFirestore } from '@vueuse/firebase/useFirestore'

export const useTodos = createGlobalState(
  () => useFirestore(collection(db, 'todos')),
)
// app.js
import { useTodos } from './store'

export default {
  setup() {
    const todos = useTodos()
    return { todos }
  },
}

Type Declarations 

export interface UseFirestoreOptions {
  errorHandler?: (err: Error) => void
  autoDispose?: boolean | number
}
export type FirebaseDocRef<T> = Query<T> | DocumentReference<T>
type Falsy = false | 0 | "" | null | undefined
export declare function useFirestore<T extends DocumentData>(
  maybeDocRef: MaybeRef<DocumentReference<T> | Falsy>,
  initialValue: T,
  options?: UseFirestoreOptions
): Ref<T | null>
export declare function useFirestore<T extends DocumentData>(
  maybeDocRef: MaybeRef<Query<T> | Falsy>,
  initialValue: T[],
  options?: UseFirestoreOptions
): Ref<T[]>
export declare function useFirestore<T extends DocumentData>(
  maybeDocRef: MaybeRef<DocumentReference<T> | Falsy>,
  initialValue?: T | undefined | null,
  options?: UseFirestoreOptions
): Ref<T | undefined | null>
export declare function useFirestore<T extends DocumentData>(
  maybeDocRef: MaybeRef<Query<T> | Falsy>,
  initialValue?: T[],
  options?: UseFirestoreOptions
): Ref<T[] | undefined>

Source

Source • Docs

© 2019-present Anthony Fu
Licensed under the MIT License.
https://vueuse.org/firebase/useFirestore/