TypeScript Coffee

Reviving a 12K+ Star Abandoned Library: toastr-next v3 🍞

This is a submission for the GitHub Finish-Up-A-Thon Challenge What I... Read More

Next.js 16 Broke My App in 4 Places and None of Them Threw an Error

The CI was green. Build passed. No TypeScript errors. No warnings. Everything looked clean. I... Read More

You’re a Real TypeScript Developer Only If...

A few months ago, I published You're a Real JavaScript Developer Only If... It was just a post for... Read More

After 7 Next.js 16 Caching Bugs, I Stopped Guessing and Built a System

There's a specific feeling you get after your third production caching incident. It's not panic.... Read More

Why My Analytics Was Logging Every Page Visit Twice (And How I Fixed It)

I built a custom analytics system into my portfolio backend — a Django REST API that records page... Read More

API Calls Done Right: From Messy Fetch to Clean Data Layer

I've seen this file in almost every frontend project I've ever touched. It's usually called api.js... Read More

Which OpenAPI Codegen Should You Choose? openapi-typescript vs hey-api vs Orval vs Kubb

Hoi hoi! I'm @nyaomaru, a frontend engineer who thought OpenAPI codegen would make API clients... Read More

I Built a Desktop App That Ends My “Open 7 Terminals and Pray” Routine

Every developer has that one painfully stupid ritual. Mine was opening multiple terminal tabs every... Read More

Mastering the Latest TypeScript: What's New in 6.0 (and a Peek at 7)

TypeScript 6.0 has been out for a few months now, and it's a bit of an unusual release. It's the last... Read More

7 Next.js 16 Caching Bugs That Compile Fine and Break Silently in Production

I lost hours debugging a Next.js 16 caching issue that had no error, no warning, and only showed up... Read More

CHANGELOG.md is for Both Humans and AI Now, So Let’s Automate It

Hoi hoi! I’m @nyaomaru, a frontend engineer who recently discovered the deliciousness of a cheese... Read More

Build your first MCP server in TypeScript: the 2026 setup that takes 30 minutes.

Build your first MCP server in TypeScript: the 2026 setup that takes 30 minutes. I had... Read More

We Are Leaving Bun… For Now

For the past two years, Bun has been one of the most exciting technologies in our stack. Fast... Read More

Building MCP Servers in TypeScript That Don't Fall Apart

A post by Mudassir Khan Read More

I was sick of InversifyJS after 3 years in production, so I built a better DI container

Three years. That's how long we ran InversifyJS in production at a medium-sized Typescript SaaS. It... Read More

Stop building AI inboxes. Build decision layers instead.

I spent six months building an AI-powered email tool. Then I deleted half of it. Not because the... Read More

I built a 20 kB React hook that doesn't care which AI you use — here's how streaming actually works

`--- Most React AI chat libraries are secretly backend libraries. They stream directly from... Read More

The Bug That Passes Every Toolchain Check: Circular Dependencies in JavaScript

Circular dependencies compile cleanly, pass tests, and ship to production. Here are the 3 patterns that create them, what Node.js, webpack, Rollup, and esbuild actually do with them, and how to stop them before they compound. Read More

Prisma vs JDBC: the benchmark that almost made me blame the wrong ORM

I built a reproducible lab to compare Prisma 5 against Spring Boot JdbcTemplate on the same PostgreSQL 16. What I found wasn't a winner: it was that query shape and N+1 explain almost everything, and blaming the ORM is too easy. Read More

Desconstruindo o Build: Como o Tree-Shaking realmente funciona (e por que o Bundle importa)

Fala, comunidade dev! 👋 No primeiro artigo da nossa série sobre a migração do YMS (do Angular 16... Read More

I Built an AI Issue Triage Bot in 500 Lines of TypeScript — Here's How

Every open-source maintainer knows the feeling. You wake up, check your repo, and there are 12 new... Read More

Is Datacentre Sovereignty Important? Why I Built a 38,000-Ticker FinTech App with No Database

Why developers are rethinking platform lock-in and heavy database clusters. How we built a zero-DB, zero-dependency Next.js 15 utility for 38,000 tickers. Read More

pnpm vs npm vs yarn in 2026: I ran all three on my real monorepo and it forced me to change my mind

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. Read More

Reincarnating a Decade-Old jQuery Project

Cleaning my old drive, I found burger.zip dated 2015. Inside: one of my first paid web gigs, a burger... Read More