Blog

A green test suite tells you that the tests you wrote pass. It doesn't tell you what you didn't write tests for. That untested error branch, the co

Server Components make it easy to forget where the server ends. You query the database right inside a component, the code never ships to the browser,

"use client" is one line at the top of a file, and it's responsible for a surprising amount of confusion. Developers add it to silence an error and

React Server Components (RSC) are the default in the Next.js App Router, which means you're using them whether you've thought about them or not. Ever

Link is probably the component you use most in a Next.js app, and the one you think about least. You import it from next/link, give it an href,

Unit tests should be fast, deterministic, and isolated. Real code, unfortunately, talks to things that are none of those: HTTP APIs that are slow or