This is a high-quality technical tutorial that guides developers through building their own React library from scratch. Author Rodrigo Pombo breaks it down into 8 detailed steps, starting with the createElement function and progressively explaining React’s core concepts and implementation principles, including concurrent mode, Fiber architecture, render and commit phases, reconciliation algorithm, functional components, and Hooks. The article provides complete code implementations, allowing readers to build their own version of React step by step and try it out directly on CodeSandbox. For frontend developers looking to deeply understand React’s internal workings, this is an extremely valuable learning resource.
