You flip on cacheComponents: true expecting a quick performance win, and instead your build explodes with red errors about dynamic, revalidate, and fetchCache not being allowed anymore. Then, once those clear, the dev overlay starts flagging routes t...

Every time you type your email and password into a login form, something is quietly deciding whether you actually get in. That decision — proving you are who you say you are — is called authentication, and it's one of those concepts every developer t...

You're building a Next.js app that needs to store files — user avatars, product photos, PDFs, whatever — and you hit the same wall every developer hits: where do the actual files go? For most apps, storing large user-uploaded files directly in Postg...

You're starting a new Next.js project and you need auth. A year ago the answer was simple: "just use NextAuth." That's not simple anymore. NextAuth is now called Auth.js, it's sitting in maintenance mode, and the team that used to build it has folded...

Sooner or later, every Stripe integration hits the same wall: a customer wants their money back, or worse, their bank files a chargeback before they even email you. Most Stripe tutorials stop at "payment succeeded" and leave you to figure out refunds...

If you followed our original MDX blog setup guidehttps://devstacked.tech/blog/mdx-remote-nextjs-16-guide, you already have a working blog powered by next-mdx-remote. There's just one problem: HashiCorp archived that repo on April 9, 2026. The package...

You add "use client" to the top of a file, TypeScript stops complaining, and everything just... works. So you start adding it everywhere — every component, just in case. A few weeks later your bundle size has crept up, your pages feel sluggish, and y...

You're building a login flow in Next.js 16, and you hit the question every auth tutorial glosses over: should the logged-in state live in a session or a JWT? Half the guides you find use one, half use the other, and almost none of them tell you why —...

You've probably seen a stray llms.txt link in someone's site footer, or noticed a new file sitting next to robots.txt and sitemap.xml on a docs site you visited. Maybe you've even been told "you need this or ChatGPT won't recommend your site." Before...

You just shipped a new billing page. It works perfectly in your local environment, QA gives it a thumbs up, and you deploy on a Friday afternoon bold choice. Twenty minutes later, support tickets start rolling in — the new checkout flow is broken for...

You've got a signup form. Email, password, maybe a checkbox for terms and conditions. Simple, right? Then someone submits email: 123 and your API route crashes with a cryptic error three files deep, because nothing ever checked that the data coming i...

You finally got Google Search Console wired uphttps://devstacked.tech/blog/google-search-console-setup-nextjs and Google is crawling your site properly. Great — now you have zero idea what any of those visitors actually do once they land. Which pages...

You're starting a new Next.js project, and before you write a single feature, you have to answer one boring but critical question: who's going to handle login? Two names keep showing up at the top of every list — Supabase Auth and Firebase Auth. Bot...

Ever shipped a Next.js app, then watched one bad API response take down the entire page — header, sidebar, footer, everything — just because one component threw an error? You're not alone. It's one of the most common "gotchas" for developers moving f...

Logging a user in is the easy part. The hard part shows up right after — when your "admin" and your "customer" both hit /dashboard and somehow need to see completely different things. Or worse, when a regular user figures out they can just type /admi...

You just shipped your Next.js site. Metadata's wired up, Open Graph tags look great, JSON-LD is in place — and yet Google has no idea your site exists. Weeks go by, you check your analytics, and organic traffic is basically zero. Here's the thing no...

If you've ever built a newsletter with Resend, you've probably hit this wall: everything works great for your first handful of subscribers, and then one day you're manually exporting a list from your CMS and pasting emails one by one because your "se...

You've built pages, you've built layouts, and now you need something that isn't a page at all — a webhook endpoint for Stripe, a JSON API for a mobile app, or a route that generates a CSV file on demand. None of that fits inside a page.tsx. That's ex...

If you've ever shipped a page with a 2.5MB hero image and watched your Lighthouse score crash to single digits, you already know why this matters. A slow, unoptimized image is one of the fastest ways to lose a visitor — most people won't wait more th...

If you followed our guide on integrating Stripe Payment Element with Next.js 16https://devstacked.tech/blog/stripe-payment-element-nextjs-16-guide, you already have a working checkout flow — a Payment Intent gets created, the user pays, and everyone'...