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Two runnable browser examples: cancellable CPU work, then transferable buffers with equivalent JavaScript and auditable WebAssembly kernels.

One pagination behavior built four ways — as a higher-order component, a render prop, a custom hook, and a headless hook with prop getters — to show what each pattern really costs and how to choose between them in React 19.

A full walk through React rendering, from the moment you call a state setter to the moment the browser paints. What a fiber is, what is really stored on one, how the two trees work, what the commit phase does, and how lanes decide what runs first. Checked line by line against React 19.3.

Node.js runs your code on a single thread and still serves many requests at the same time. This post follows one HTTP request from the socket to the response, and uses measurements to show which work needs a thread and which work the operating system does for free.

React Server Components are powerful and extremely important new application architecture for building scalable, smart, and complex React applications. This post will cover everything you need to know about RSCs, and how to use Suspense for data fetching.