The Server Action resolves, the toast says "saved," and the UI still shows the old data for a beat. That beat is the gap setQueryData closes without waiting for the full server roundtrip.
Sep 08 2026 · 7′ · Tutorials · Next.js · React
I confused revalidatePath with revalidateTag on a small project and ended up invalidating pages that had nothing to do with the change. Here's the real difference between the two cache granularities in Next.js 16, with a decision checklist.
Sep 04 2026 · 7′ · Tutorials · Next.js · React
The difference between npm and pnpm isn't install speed. It's a different storage model — content-addressable store vs a folder tree — and that model matters based on project size, not on what's trendy.
Aug 29 2026 · 8′ · Tutorials · Next.js · pnpm
fp-ts is a university, not a production framework for most teams. But ignoring it completely means leaving genuinely valuable concepts on the table. An honest walkthrough of Option, Either, and pipe from the perspective of strict TypeScript in the real world — plus the uncomfortable question of whether you actually need it.
Aug 07 2026 · 10′ · Tutorials · Next.js · TypeScript
Compiler says OK. Runtime explodes anyway. Here are the 4 patterns where strict null checks isn't enough: assertion functions, untyped libraries, Prisma ORM, and JSON.parse — with real code from a Next.js/Prisma stack.
Jul 23 2026 · 8′ · Tutorials · Next.js · TypeScript
The README on juanchi.dev says "portfolio landing". The code says something else: an editorial system with repo ingestion, quality gate, automatic rewriting, and crons on Railway. The technical story the README doesn't tell.
Jun 22 2026 · 6′ · Next.js · TypeScript
tsgo is real and the performance jump is verifiable — but the beta has documented limits that most posts quietly ignore. Here's the concrete criteria for deciding whether to explore it today or wait for stable.
Jun 02 2026 · 8′ · Tutorials · Next.js · TypeScript
Before you install any rate limiting middleware in Next.js, you need to define what asset you're protecting, what abuse you're expecting, and what a false positive actually costs you. The library is the last decision. The policy is the first.
May 21 2026 · 8′ · Tutorials · Next.js · TypeScript
I ran all three package managers on the same Next.js 16 + strict TypeScript monorepo with Shadcn/ui and Radix UI. pnpm wins on disk and CI — but there's a real compatibility cost the migration guides never tell you about.
May 10 2026 · 8′ · Experiments · Next.js · TypeScript
Architecture, real systems, product decisions and technical lessons. Everything reviewed with my own judgment before it ships.
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