React Under the Hood: Building a Tiny Virtual DOM Renderer

React looks magical until you remove the parts that make it production-ready. JSX is just function calls. Components are just functions. Virtual DOM nodes are just plain JavaScript objects. Rendering is "just" comparing two trees and patching the DOM. Of course, real React is much more than that: hooks, scheduling, Fiber, context, refs, synthetic events, hydration, concurrent rendering, and many other things. This article is not about cloning React. The goal is much smaller: to build a tiny Reac