Writing from the workshop
202 articles on the parts that actually hurt.
The Search Highlight That Deletes Your Selection
A search-highlight feature that rebuilds its DOM on every keystroke can wipe out a user's own text selection with no warning. The CSS Custom Highlight API fixes it by styling text ranges without ever touching a DOM node.
Sep 13, 2026 · 6 min
My .catch() Never Ran. The Bug Was Two Lines Above It
A function that sometimes throws synchronously instead of returning a promise will skip every .catch() chained to it — because the promise never gets created. Promise.try() fixes it, and does one thing try/catch can't.
Sep 13, 2026 · 5 min
NestJS Module Encapsulation Explained (with Cheat Sheet)
How NestJS module boundaries actually work: what exports really cross, why @Global() isn't a shortcut, and how forwardRef breaks circular module dependencies.
Sep 13, 2026 · 15 min
NestJS Dependency Injection Explained (with Cheat Sheet)
How the NestJS DI container resolves providers: tokens, module scope, singleton vs request vs transient, and why 'singleton' can still mean two instances.
Sep 13, 2026 · 14 min
Stop Regex-Parsing document.cookie. Use CookieStore
document.cookie hands you one flat string and no way to know when it changes. The Cookie Store API gives you async get/set/delete and a change event — but its set() defaults to a stricter SameSite than the one you're used to.
Sep 13, 2026 · 6 min
addDays() Mutated a Date Three Components Away From Where I Called It
A date utility that calls .setDate() and returns the same object looks pure. It isn't — Date is mutable, so the caller and everyone else holding that reference get changed out from under them. Temporal, now shipping in real browsers, fixes it by making dates immutable.
Sep 12, 2026 · 5 min
React Form Actions: useActionState & useFormStatus Guide
How React 19 form Actions manage pending state automatically — useActionState, useFormStatus, and useOptimistic explained with the bug they replace.
Sep 12, 2026 · 13 min
I Shipped 'Passwordless Login.' It Still Asked for a Username.
WebAuthn's own demo code creates a credential the browser can't find on its own — so your passkey button quietly turns into a fancier security key instead of an actual passwordless sign-in. One option fixes it.
Sep 10, 2026 · 6 min
Stop Hardcoding Share Buttons — Use the Web Share API
Every blog footer hardcodes the same row of share icons — X, Facebook, copy link — and none of them know what's actually installed on your phone. The Web Share API hands the job to the OS instead, and it can do something a custom row never could: share an actual file.
Sep 9, 2026 · 6 min
Next.js Server Actions: Mutations & Security (Cheat Sheet)
Next.js Server Actions look like plain functions but compile to public POST endpoints. Learn the mutation flow, built-in CSRF checks, and the auth you owe.
Sep 8, 2026 · 15 min
Your Required Field Turns Red Before You Type Anything
A signup form's email input shows a red border the instant the page loads — before the visitor has typed a single character. The obvious CSS causes it, and the obvious fix is a native pseudo-class nobody reaches for first.
Sep 8, 2026 · 5 min
Web Workers in JavaScript: The Complete Guide
Learn JavaScript Web Workers step by step: message passing, transferable objects, error handling, and a copy-paste cheat sheet for offloading work.
Sep 7, 2026 · 13 min