nextjs-supabase-auth

Next.js + Supabase Auth

Expert integration of Supabase Auth with Next.js App Router

Capabilities

• nextjs-auth
• supabase-auth-nextjs
• auth-middleware
• auth-callback

Prerequisites

• Required skills: nextjs-app-router, supabase-backend

Patterns

Supabase Client Setup

Create properly configured Supabase clients for different contexts

When to use: Setting up auth in a Next.js project

// lib/supabase/client.ts (Browser client) 'use client' import { createBrowserClient } from '@supabase/ssr'

export function createClient() { return createBrowserClient( process.env.NEXT_PUBLIC_SUPABASE_URL!, process.env.NEXT_PUBLIC_SUPABASE_ANON_KEY! ) }

// lib/supabase/server.ts (Server client) import { createServerClient } from '@supabase/ssr' import { cookies } from 'next/headers'

export async function createClient() { const cookieStore = await cookies() return createServerClient( process.env.NEXT_PUBLIC_SUPABASE_URL!, process.env.NEXT_PUBLIC_SUPABASE_ANON_KEY!, { cookies: { getAll() { return cookieStore.getAll() }, setAll(cookiesToSet) { cookiesToSet.forEach(({ name, value, options }) => { cookieStore.set(name, value, options) }) }, }, } ) }

Auth Middleware

Protect routes and refresh sessions in middleware

When to use: You need route protection or session refresh

// middleware.ts import { createServerClient } from '@supabase/ssr' import { NextResponse, type NextRequest } from 'next/server'

export async function middleware(request: NextRequest) { let response = NextResponse.next({ request })

const supabase = createServerClient( process.env.NEXT_PUBLIC_SUPABASE_URL!, process.env.NEXT_PUBLIC_SUPABASE_ANON_KEY!, { cookies: { getAll() { return request.cookies.getAll() }, setAll(cookiesToSet) { cookiesToSet.forEach(({ name, value, options }) => { response.cookies.set(name, value, options) }) }, }, } )