API Reference

Configuration

Export	Description
`initFirekit(config)`	Initialize Firebase. Call once before your app renders.
`getFirekitConfig()`	Return the active Firebase config object.
`isFirekitConfigured()`	Return `true` if `initFirekit` has been called.

Authentication

`firekitAuth`

Singleton service for auth operations.

Method	Signature	Description
`signInWithEmail`	`(email, password) → Promise<UserCredential>`	Sign in with email & password
`signInWithGoogle`	`() → Promise<UserCredential>`	Sign in with Google (popup)
`signInWithGithub`	`() → Promise<UserCredential>`	Sign in with GitHub (popup)
`signInWithFacebook`	`() → Promise<UserCredential>`	Sign in with Facebook (popup)
`signInWithApple`	`() → Promise<UserCredential>`	Sign in with Apple (popup)
`signInWithTwitter`	`() → Promise<UserCredential>`	Sign in with Twitter (popup)
`signInWithMicrosoft`	`() → Promise<UserCredential>`	Sign in with Microsoft (popup)
`signInWithGoogleRedirect`	`() → Promise<void>`	Sign in with Google (redirect)
`getRedirectResult`	`() → Promise<UserCredential \| null>`	Resolve pending redirect
`signInWithSAML`	`(providerId) → Promise<UserCredential>`	Sign in with SAML provider
`signInWithOIDC`	`(providerId, scopes?) → Promise<UserCredential>`	Sign in with OIDC provider
`signInWithPhoneNumber`	`(phone, containerId) → Promise<{ confirm }>`	Start phone sign-in
`signInAnonymously`	`() → Promise<UserCredential>`	Anonymous sign-in
`signInWithCustomToken`	`(token) → Promise<UserCredential>`	Sign in with a custom token
`registerWithEmail`	`(email, password, displayName?) → Promise<UserCredential>`	Create an account
`updateUserProfile`	`(profile) → Promise<void>`	Update display name / photo URL
`updateEmail`	`(newEmail) → Promise<void>`	Change email address
`updatePassword`	`(newPassword, currentPassword) → Promise<void>`	Change password
`sendPasswordReset`	`(email) → Promise<void>`	Send password reset email
`sendEmailVerification`	`() → Promise<void>`	Send verification email
`signOut`	`() → Promise<void>`	Sign out
`deleteAccount`	`(password?) → Promise<void>`	Delete the current account
`startPhoneMFAEnrollment`	`(phone, containerId) → Promise<string>`	Begin phone MFA enrollment
`completeMFAEnrollment`	`(verificationId, code, displayName?) → Promise<void>`	Finish MFA enrollment
`getMFAEnrolledFactors`	`() → MultiFactorInfo[]`	List enrolled MFA factors
`unenrollMFA`	`(factor) → Promise<void>`	Remove an MFA factor
`getMFAResolver`	`(error) → MultiFactorResolver`	Get resolver from MFA error
`startMFASignIn`	`(resolver, factorIndex, containerId) → Promise<string>`	Start MFA sign-in challenge
`completeMFASignIn`	`(resolver, verificationId, code) → Promise<UserCredential>`	Complete MFA sign-in

`firekitUser`

Reactive singleton reflecting the current auth state.

Property	Type	Description
`user`	`UserProfile \| null`	Current user profile
`loading`	`boolean`	`true` until the first auth state is received
`isAuthenticated`	`boolean`	Signed in and not anonymous
`isAnonymous`	`boolean`	Anonymous session
`initialized`	`boolean`	`true` after the first auth state

Method	Signature	Description
`waitForAuth`	`() → Promise<UserProfile \| null>`	Resolves when auth state is known

Firestore

`firekitDoc(path, constraints?, options?)`

Returns a FirekitDoc<T> instance.

Property	Type	Description
`data`	`T \| null`	Document data
`loading`	`boolean`	Loading state
`error`	`Error \| null`	Error state
`exists`	`boolean`	Whether the document exists
`metadata`	`SnapshotMetadata \| null`	Firestore snapshot metadata

Method	Signature	Description
`setPath`	`(path: string) → void`	Switch to a new document path

`firekitDocOnce(path, constraints?, options?)`

One-time fetch. Same properties as firekitDoc, no live listener.

`firekitCollection(path, constraints?, options?)`

Returns a FirekitCollection<T> instance.

Property	Type	Description
`data`	`T[]`	Document array
`loading`	`boolean`	Loading state
`error`	`Error \| null`	Error state
`count`	`number`	Number of documents
`currentPage`	`number`	Active page (when paginated)
`hasMore`	`boolean`	Whether more pages exist

Method	Signature	Description
`setPagination`	`(pageSize: number) → Promise<void>`	Enable pagination
`nextPage`	`() → Promise<void>`	Load next page
`prevPage`	`() → Promise<void>`	Load previous page
`loadMore`	`() → Promise<void>`	Append next page
`resetPagination`	`() → Promise<void>`	Return to page 1

`firekitCollectionOnce(path, constraints?, options?)`

One-time collection fetch.

`firekitCollectionGroup(collectionId, constraints?, options?)`

Reactive collection group query. Same interface as firekitCollection.

`FirekitQueryBuilder<T>`

Method	Description
`.where(field, op, value)`	Add a where filter
`.orderBy(field, dir?)`	Sort by field
`.limit(n)`	Limit results
`.limitToLast(n)`	Last N results
`.startAt(...values)`	Cursor start (inclusive)
`.startAfter(...values)`	Cursor start (exclusive)
`.endAt(...values)`	Cursor end (inclusive)
`.endBefore(...values)`	Cursor end (exclusive)
`.build()`	Return `QueryConstraint[]`

`firekitMutations`

Method	Signature	Description
`add`	`(path, data, options?) → Promise<DocumentReference>`	Add document
`set`	`(path, data, options?) → Promise<void>`	Set document
`update`	`(path, data, options?) → Promise<void>`	Update fields
`delete`	`(path) → Promise<void>`	Delete document
`exists`	`(path) → Promise<boolean>`	Check existence
`batchOps`	`(ops: FirekitBatchOp[], options?) → Promise<FirekitBatchResult>`	Batch write
`transaction`	`(fn) → Promise<void>`	Run a transaction
`increment`	`(n) → FieldValue`	Atomic increment
`arrayUnion`	`(...values) → FieldValue`	Array union
`arrayRemove`	`(...values) → FieldValue`	Array remove
`deleteField`	`() → FieldValue`	Delete field
`serverTimestamp`	`() → FieldValue`	Server timestamp

Realtime Database

`firekitNode(path)`

Returns a FirekitNode<T> instance.

Property/Method	Type	Description
`data`	`T \| null`	Current value
`loading`	`boolean`	Loading state
`set(value)`	`Promise<void>`	Replace value
`update(partial)`	`Promise<void>`	Merge partial update
`fetchOnce()`	`Promise<T \| null>`	One-time fetch

`firekitNodeList(path)`

Returns a FirekitNodeList<T> instance.

Property/Method	Type	Description
`list`	`T[]`	Ordered list (each item has a `key`)
`loading`	`boolean`	Loading state
`push(data)`	`Promise<void>`	Push new item
`set(value)`	`Promise<void>`	Set entire node
`update(partial)`	`Promise<void>`	Merge partial update
`remove()`	`Promise<void>`	Delete node
`fetchOnce()`	`Promise<T[] \| null>`	One-time fetch

Helpers

Export	Description
`rtdbServerTimestamp()`	RTDB server timestamp
`rtdbIncrement(delta)`	Atomic RTDB increment

Storage

`firekitDownloadUrl(path)`

Property	Type	Description
`url`	`string \| null`	Resolved download URL
`loading`	`boolean`	Loading state
`error`	`Error \| null`	Error state

`firekitUploadTask(path, file, metadata?)`

Property/Method	Type	Description
`progress`	`number`	0–100
`state`	`UploadState`	Current upload state
`downloadURL`	`string \| null`	Available on success
`error`	`Error \| null`	Error state
`bytesTransferred`	`number`	Bytes uploaded
`totalBytes`	`number`	Total file size
`pause()`	`void`	Pause upload
`resume()`	`void`	Resume upload
`cancel()`	`void`	Cancel upload

`firekitStorageList(path)`

Property	Type	Description
`items`	`StorageReference[]`	Files in the directory
`prefixes`	`StorageReference[]`	Sub-directories
`loading`	`boolean`	Loading state

Utilities

Export	Signature	Description
`deleteFile`	`(path) → Promise<void>`	Delete a file
`getFileMetadata`	`(path) → Promise<FullMetadata>`	Read file metadata
`updateFileMetadata`	`(path, metadata) → Promise<FullMetadata>`	Update metadata

Firebase AI

`firekitGenerate(options)`

Property/Method	Type	Description
`text`	`string`	Generated text
`loading`	`boolean`	Generating
`error`	`Error \| null`	Error state
`generate(prompt)`	`Promise<void>`	Run generation

`firekitStream(options)`

Property/Method	Type	Description
`text`	`string`	Accumulated tokens
`streaming`	`boolean`	`true` while streaming
`error`	`Error \| null`	Error state
`generate(prompt)`	`Promise<void>`	Start streaming generation

`firekitChat(options)`

Property/Method	Type	Description
`history`	`ChatMessage[]`	Full conversation
`pendingText`	`string`	Partial streaming response
`streaming`	`boolean`	Streaming in progress
`error`	`Error \| null`	Error state
`send(message)`	`Promise<void>`	Send a message
`clearHistory()`	`void`	Reset conversation

Content helpers

Export	Description
`textPart(text)`	Create a text content part
`imagePart(base64, mimeType)`	Create an image content part from base64
`imageUrlPart(url)`	Create an image content part from URL

`FirekitAIOptions`

Field	Type	Description
`model`	`string`	Model ID (e.g. `'gemini-2.0-flash'`)
`backend`	`'googleai' \| 'vertexai'`	AI backend (default: `'googleai'`)
`generationConfig`	`GenerationConfig`	Temperature, topP, max tokens, etc.
`safetySettings`	`SafetySetting[]`	Safety thresholds

Cloud Functions

`firekitCallable<I, O>(name)`

Property/Method	Type	Description
`loading`	`boolean`	Call in flight
`error`	`Error \| null`	Error state
`result`	`O \| null`	Last successful result
`call(input)`	`Promise<O>`	Invoke the function

`firekitCallableFromURL<I, O>(url)`

Same interface as firekitCallable.

Platform services

Export	Key methods/properties
`firekitAnalytics`	`logEvent`, `setUserId`, `setUserProperties`, `logScreenView`, `setConsent`
`firekitMessaging`	`requestPermission`, `onMessage`, `token`, `permission`, `supported`
`firekitInAppMessaging`	`suppress`, `unsuppress`, `suppressed`, `supported`
`firekitRemoteConfig(options)`	`fetchAndActivate`, `getString`, `getBoolean`, `getNumber`, `getValue`
`firekitPerformance`	`startTrace`, `measure`
`firekitPresence`	`initialize`, `setPresence`, `getStats`, `dispose`
`firekitAppCheck`	`initialize`, `getToken`

Firestore Bundles

Export	Signature	Description
`loadFirestoreBundle`	`(stream: ReadableStream) → Promise<void>`	Load a bundle into the local cache
`getNamedQuery<T>`	`(name: string) → Promise<Query<T> \| null>`	Retrieve a named query