Blog

Conditional types and mapped types let you write types that compute — filtering keys, extracting nested types, and deriving new shapes from old ones without duplication.

Node.js is single-threaded — but Worker Threads let you move CPU-heavy tasks off the event loop so your server stays responsive under real load.

React 18+ lets you mark state updates as non-urgent so expensive re-renders stop blocking inputs. Here's exactly when to use startTransition, useTransition, and useDeferredValue.

TypeScript ships with 15+ utility types that let you derive new types from existing ones. Here's the full toolkit with the production patterns you'll actually reach for.

Stop writing the same function for every type or reaching for `any`. TypeScript generics let you write it once — with full type inference, constraints, and zero casting.

Stop casting with `as` and `!`. Discriminated unions give TypeScript enough information to narrow types automatically — making impossible states unrepresentable and exhaustiveness checking free.

Most teams hit 'use client' everywhere and wonder why their bundle explodes. The fix is a single mental model: keep the boundary as low as possible, and use composition to thread server-rendered content through client islands.

React Context is great for static config but a footgun for dynamic state. Learn how to split contexts by update frequency and separate state from dispatch.

Learn how React.lazy, Suspense boundaries, and React 19 concurrent features (useTransition, useDeferredValue) eliminate bundle bloat and loading jank.