Avolve

Next.js 15

v15.5.4
Production Ready

React framework for building full-stack web applications with built-in server-side rendering, routing, and performance optimization.

Official Resources
Authoritative documentation and source code from the official maintainers.
Stack Compatibility (Oct 2025)
Verified versions tested together in production
DependencyVersionStatus
React19.2.0 Compatible
TypeScript5.9.2 Compatible
Node.js24.8.0 Compatible
Vercel AI SDK5.0.48 Compatible

Getting Started

Create a new Next.js app in 30 seconds with our verified stack configuration.

terminalbash
# Create new Next.js app with Turbopack
npx create-next-app@latest my-app --turbo

# Navigate to your project
cd my-app

# Start development server
npm run dev

Integration Patterns

Next.js + Vercel AI SDK

Stream AI responses directly to React components with Server Actions.

app/api/chat/route.tstypescript
1import { streamText } from 'ai';
2import { openai } from '@ai-sdk/openai';
3
4export async function POST(req: Request) {
5  const { messages } = await req.json();
6
7  const result = streamText({
8    model: openai('gpt-4'),
9    messages,
10  });
11
12  return result.toDataStreamResponse();
13}

Next.js + Supabase Auth

Server-side authentication with Supabase cookies and middleware.

lib/auth.tstypescript
1import { createServerClient } from '@supabase/ssr';
2import { cookies } from 'next/headers';
3
4export async function getUser() {
5  const cookieStore = await cookies();
6
7  const supabase = createServerClient(
8    process.env.NEXT_PUBLIC_SUPABASE_URL!,
9    process.env.NEXT_PUBLIC_SUPABASE_ANON_KEY!,
10    {
11      cookies: {
12        getAll() {
13          return cookieStore.getAll();
14        },
15      },
16    }
17  );
18
19  const { data: { user } } = await supabase.auth.getUser();
20  return user;
21}

What Breaks in Production

Real issues we've encountered and how to fix them.

Missing environment variables

Symptom: Build succeeds locally, fails in production with "process.env.X is undefined"

Cause: Environment variables not prefixed with NEXT_PUBLIC_ are only available server-side

Fix: Use NEXT_PUBLIC_ prefix for client-side variables, or access them only in Server Components/API routes

// ❌ Wrong - undefined on client
const apiKey = process.env.API_KEY;

// ✅ Right - available on client
const publicKey = process.env.NEXT_PUBLIC_API_KEY;

// ✅ Right - server-side only
export async function getServerSideProps() {
  const apiKey = process.env.API_KEY; // Works in server context
  // ...
}
Hydration mismatches with useEffect

Symptom: Console warning "Text content does not match server-rendered HTML"

Cause: Client state (localStorage, Date.now()) differs from server render

Fix: Use suppressHydrationWarning or useState with useEffect

// ✅ Right - prevents hydration mismatch
'use client';

import { useState, useEffect } from 'react';

export function ClientTime() {
  const [time, setTime] = useState<string | null>(null);

  useEffect(() => {
    setTime(new Date().toLocaleTimeString());
  }, []);

  return <div>{time ?? 'Loading...'}</div>;
}
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