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@daveyplate/better-auth-tanstack

Tanstack Query hooks for Better Auth. Provides tighter control of when requests are made, optimistic mutations, and supports offline caching for offline auth via Persist Cients.

More to come soon... (e.g. more SSR prefetches, organization & stripe plugin hooks, SWR port...)

Prerequisites

First, you need to install and integrate Better Auth & Tanstack Query.

Installation

pnpm

pnpm add @daveyplate/better-auth-tanstack@latest

npm

npm install @daveyplate/better-auth-tanstack@latest

For the useSession hook to refresh on sign in, sign out, and sign up without email verification, you must manually call refetch or queryClient.resetQueries() for ["session"] in the onSuccess callback of each of those functions or after awaiting and checking for an error.

If you are using Next.js App Router with protected middleware routes, router.refresh() is required as well to clear the router cache.

@daveyplate/better-auth-ui Better Auth UI supports better-auth-tanstack out of the box! You simply need to use the AuthUIProviderTanstack.

Setting up the AuthQueryProvider

First, you need to set up the AuthQueryProvider in your application. This provider will supply the necessary context for the hooks to function. Requires "use client" directive for Next.js App Router.

app/providers.tsx

"use client"

import { AuthQueryProvider } from "@daveyplate/better-auth-tanstack"

export default function Providers({
  children,
}: {
  children: React.ReactNode
}) {
    return (
        <AuthQueryProvider>
            {children}
        </AuthQueryProvider>
    )
}

app/layout.tsx

import { Providers } from "./providers"

export default function RootLayout({
  children,
}: {
  children: React.ReactNode
}) {
    return (
        <Providers>
            {children}
        </Providers>
    )
}

AuthQueryProvider Props

The AuthQueryProvider component accepts the following props. The default staleTime for sessions is 30 seconds and for JWT tokens is 10 minutes.

Prop Type Description
queryOptions? UseQueryOptions Optional query options for the provider.
sessionQueryOptions? UseQueryOptions Optional query options for the session query.
tokenQueryOptions? UseQueryOptions Optional query options for the token query.
sessionKey? string[] Optional key for the session query. The default is ["session"].
tokenKey? string[] Optional key for the token query. The default is ["token"].
listAccountsKey? string[] Optional key for the listAccounts query. The default is ["list-accounts"].
listSessionsKey? string[] Optional key for the listSessions query. The default is ["list-sessions"].
optimistic? boolean Whether to perform optimistic updates. The default is true.
refetchOnMutate? boolean Whether to refetch after mutates. The default is true.

Creating use-auth-hooks.ts

Create a file named use-auth-hooks.ts and set up the hooks using createAuthHooks function. This function takes the authClient instance and returns the hooks with full type safety and inference from your authClient.

import { createAuthClient } from "better-auth/react"
import { createAuthHooks } from "@daveyplate/better-auth-tanstack"
import { authClient } from "@/lib/auth-client"

export const { 
    useSession, 
    usePrefetchSession, 
    useToken,
    useListAccounts,
    useListSessions,
    useListPasskeys
} = createAuthHooks(authClient)

Using the Hooks

useSession

The useSession hook is used to fetch the session.

Props

Prop Type Description
options? UseQueryOptions Optional query options for the session query.

Example

import { useSession } from "@/hooks/use-auth-hooks"

function MyComponent() {
    const { 
        data: sessionData, 
        session, 
        user, 
        isPending, 
        refetch, 
        error, 
        updateUser, 
        updateError 
    } = useSession()

    if (isPending) return <div>Loading...</div>

    return <div>Welcome, {user?.email}</div>
}

useToken

The useToken hook is used to fetch the JWT token if better-auth JWT plugin is enabled.

Props

Prop Type Description
options? UseQueryOptions Optional query options for the token query.

Example

import { useToken } from "@/hooks/use-auth-hooks"

function MyComponent() {
    const { token, payload, isPending } = useToken()

    if (isPending) return <div>Loading...</div>

    return <div>JWT: {token}</div>
}

useListAccounts

The useListAccounts hook allows you to list and manage user accounts linked to different providers.

Usage

import { useListAccounts } from "@/hooks/use-auth-hooks"

function AccountList() {
  const { accounts, unlinkAccount, unlinkAccountError, isPending, error } = useListAccounts()

  if (isPending) return <div>Loading...</div>;
  if (error) return <div>Error: {error.message}</div>

  return (
    <div>
      <h2>Linked Accounts</h2>
      <ul>
        {accounts?.map(account => (
          <li key={account.id}>
            {account.provider}
            <button onClick={() => unlinkAccount(account.provider)}>Unlink</button>
          </li>
        ))}
      </ul>
    </div>
  )
}

Use the unlinkAccount function to unlink an account by provider ID. This is the optimistic example. See below for non-optimistic examples.

unlinkAccount({ providerId: "github" })

useListSessions

import { useListSessions } from "@/hooks/use-auth-hooks"

function SessionList() {
  const { 
    sessions, 
    isPending,
    error
    revokeSession, 
    revokeSessionPending,
    revokeSessionError,
    revokeSessions,
    revokeSessionsPending,
    revokeSessionsError,
    revokeOtherSessions,
    revokeOtherSessionsPending,
    revokeOtherSessionsError,
   } = useListSessions()

  if (isPending) return <div>Loading...</div>;
  if (error) return <div>Error: {error.message}</div>

  return (
    <div>
      <h2>Active Sessions</h2>
      <ul>
        {sessions?.map(session => (
          <li key={session.id}>
            {session.userAgent}
            <button onClick={() => revokeSession(session.token)}>Revoke</button>
          </li>
        ))}
      </ul>
    </div>
  )
}

useListDeviceSessions

  const { 
    deviceSessions, 
    isPending,
    error,
    revokeDeviceSession, 
    revokeDeviceSessionPending,
    revokeDeviceSessionError,
    setActiveSession,
    setActiveSessionPending,
    setActiveSessionError
   } = useListDeviceSessions()

useListPasskeys

const {
    passkeys,
    isPending,
    error
    deletePasskey,
    deletePasskeyPending,
    deletePasskeyError
} = useListPasskeys()

Mutations - updateUser

Optimistic example

Optimistic example to update user's name with no loaders. Optimistically updates the user in the Tanstack Query cache instantly. Revalidates on success, reverts on error. Uses the default setting for optimistic (true) prop on AuthQueryProvider.

This package supports the Tanstack Query global error configuration:

queryClient.getQueryCache().config.onError gets called automatically, so you can set up global error toasts to show error.message || error.statusText. Tanstack Query Global Error Callbacks

"use client"

import { useState } from "react"

import { Button } from "@/components/ui/button"
import { Card, CardContent, CardHeader, CardTitle } from "@/components/ui/card"
import { Input } from "@/components/ui/input"
import { Label } from "@/components/ui/label"
import { useSession } from "@/hooks/use-auth-hooks"

export default function SettingsPage() {
    const { user, isPending, updateUser, updateError } = useSession()
    const [disabled, setDisabled] = useState(true)

    const updateProfile = (formData: FormData) => {
        const name = formData.get("name") as string

        setDisabled(true)
        updateUser({ name: name })
    }

    useEffect(() => {
        if (updateError) {
            // Show an error Toast
        }
    }, [updateError])

    if (isPending || !user) {
        return (
            <div>
                Loading...
            </div>
        )
    }

    return (
        <div className="flex flex-col items-center gap-4 my-auto">
            <Card className="w-full max-w-md">
                <CardHeader>
                    <CardTitle>
                        Change Name
                    </CardTitle>
                </CardHeader>

                <CardContent>
                    <form
                        action={updateProfile}
                        className="flex flex-col gap-4 items-start"
                    >
                        <Label htmlFor="name">
                            Name
                        </Label>

                        <Input
                            defaultValue={user.name}
                            name="name"
                            placeholder="Name"
                            onChange={() => setDisabled(false)}
                        />

                        <Button disabled={disabled}>
                            Save
                        </Button>
                    </form>
                </CardContent>
            </Card>
        </div>
    )
}

Unoptimistic example

Unoptimistic example with useActionState to show loaders for updating a user's name. Set optimistic to false in the AuthQueryProvider props to disable optimistic cache updates. Sends a request to /api/auth/update-user then updates the user in the Tanstack Query cache after the request is successful. Then revalidates the session by refetching.

Note that we use updateUserAsync

"use client"

import { Loader2 } from "lucide-react"
import { useActionState } from "react"

import { Button } from "@/components/ui/button"
import { Card, CardContent, CardHeader, CardTitle } from "@/components/ui/card"
import { Input } from "@/components/ui/input"
import { Label } from "@/components/ui/label"
import { useSession } from "@/hooks/use-auth-hooks"
import { cn } from "@/lib/utils"

export default function SettingsPage() {
    const { user, isPending, updateUserAsync, updateError } = useSession()
    const [disabled, setDisabled] = useState(true)

    type ActionState = Parameters<typeof updateUser>[0]

    const updateProfile = async (_: ActionState, formData: FormData) => {
        const name = formData.get("name") as string

        setDisabled(true)

        const { error } = await updateUserAsync({ name, fetchOptions: { throw: false } })

        if (error) {
            // Show an error Toast or throw an error to an ErrorBoundary

            setDisabled(false)
        }

        return { name } as ActionState
    }

    const [state, action, isSubmitting] = useActionState(updateProfile, {})

    // useEffect(() => {
    //     if (updateError) {
    //          setDisabled(false)
    //         // Show an error Toast
    //     }
    // }, [updateError])

    if (isPending || !user) {
        return (
            <div>
                Loading...
            </div>
        )
    }

    return (
        <div className="flex flex-col items-center gap-4 my-auto">
            <Card className="w-full max-w-md">
                <CardHeader>
                    <CardTitle>
                        Change Name
                    </CardTitle>
                </CardHeader>

                <CardContent>
                    <form
                        action={action}
                        className="flex flex-col gap-4 items-start"
                    >
                        <Label htmlFor="name">
                            Name
                        </Label>

                        <Input
                            defaultValue={state?.name ?? user.name}
                            name="name"
                            placeholder="Name"
                            onChange={() => setDisabled(false)}
                        />

                        <Button disabled={isSubmitting || disabled}>
                            <span className={cn(isSubmitting && "opacity-0")}>
                                Save
                            </span>

                            {isSubmitting && <Loader2 className="animate-spin absolute" />}
                        </Button>
                    </form>
                </CardContent>
            </Card>
        </div>
    )
}

Server-Side Prefetch - Advanced Usage

If you want to use a hybrid prefetching strategy, this is totally supported.

Tanstack Query - Advanced Server Rendering

SSR prefetchSession

The prefetchSession function is used in the server to prefetch session data and store it in the query client.

Props

Prop Type Description
auth Auth The server auth instance.
queryClient QueryClient The query client instance.
headers Headers The headers object from the server request.
queryKey? string[] Optional key for the session query. Default is ["session"].

RSC Example

import { prefetchSession } from "@daveyplate/better-auth-tanstack/server"
import { HydrationBoundary, QueryClient, dehydrate } from "@tanstack/react-query"
import { headers } from "next/headers"

import { betterAuth } from "better-auth"
import { auth } from "@/lib/auth"

export default async function Page() {
    const queryClient = new QueryClient()

    const { data, session, user } = await prefetchSession(
        auth, queryClient, await headers()
    )

    return (
        <HydrationBoundary state={dehydrate(queryClient)}>
            <ClientPage />
        </HydrationBoundary>
    )
}

License

This project is licensed under the MIT License. See the LICENSE file for details.

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