Type-Level Narrowing: How TypeScript Decides What You Meant
Control flow analysis is a graph walk over your code. Knowing what widens a type again explains most of the errors that look wrong.
javascript
5 posts
The Event Loop You Think You Know
Microtasks, rendering opportunities and starvation — what the loop actually does between your callbacks, in the browser and in Node.
What Actually Happens When Vite Serves a Module
A walk through one request to a Vite dev server: resolution, the transform pipeline, import rewriting, pre-bundling, and why production differs.
Signals Are Not Magic: The Dependency Graph Underneath
Every signals library is the same forty lines of bookkeeping. Here is what those lines do, and where the four popular implementations diverge.
How V8 Decides to Optimize Your Function
Two functions that look identical can run at very different speeds. The difference is usually shapes, inline caches, and a deoptimization you never saw.